$TSVT
2Seventy Bio Inc Stock $tsvt

$tsvt Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000186078222000005 Filed on March 22, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$16.03M	$54.52M	$248.1M
YoY Change	-93.54%	-78.03%
Cost Of Revenue	$406.0K	$2.517M	$5.396M
YoY Change	-92.48%	-53.35%
Gross Profit	$15.63M	$52.01M	$242.7M
YoY Change	-93.56%	-78.57%
Gross Profit Margin	97.47%	95.38%	97.83%
Selling, General & Admin	$24.48M	$93.51M	$90.90M
YoY Change	-73.07%	2.87%
% of Gross Profit	156.65%	179.8%	37.45%
Research & Development	$59.54M	$261.9M	$296.5M
YoY Change	-79.92%	-11.65%
% of Gross Profit	381.0%	503.68%	122.14%
Depreciation & Amortization	$3.535M	$16.35M	$6.657M
YoY Change	-46.9%	23.98%
% of Gross Profit	22.62%	31.44%	2.74%
Operating Expenses	$84.00M	$355.4M	$380.9M
YoY Change	-77.95%	-8.24%
Operating Profit	-$68.37M	-$313.9M	-$138.2M
YoY Change	-50.52%	127.22%
Interest Expense	$88.00K	$88.00K	$0.00
YoY Change
% of Operating Profit
Other Income/Expense, Net	$7.307M	$21.65M	$18.06M
YoY Change	-59.53%	19.89%
Pretax Income	-$60.98M	-$292.2M	-$120.1M
YoY Change	-49.23%	143.28%
Income Tax	$0.00	$0.00	$0.00
% Of Pretax Income
Net Earnings	-$60.98M	-$292.2M	-$120.1M
YoY Change	-49.23%	143.27%
Net Earnings / Revenue	-380.29%	-535.93%	-48.41%
Basic Earnings Per Share		-$12.44
Diluted Earnings Per Share	-$2.552M	-$12.44	-$5.140M
COMMON SHARES
Basic Shares Outstanding	23.37M shares	23.50M shares
Diluted Shares Outstanding		23.50M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$265.1M	$265.1M
YoY Change
Cash & Equivalents	$130.4M	$130.4M	$0.00
Short-Term Investments	$134.6M	$134.6M
Other Short-Term Assets	$9.512M	$9.512M
YoY Change		-34.0%
Inventory
Prepaid Expenses	$9.512M		$14.41M
Receivables	$17.00M	$17.00M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$291.6M	$291.6M	$25.10M
YoY Change	1061.42%	1061.42%
LONG-TERM ASSETS
Property, Plant & Equipment	$34.91M	$310.4M	$144.0M
YoY Change	-75.76%	19.18%
Goodwill	$12.06M		$13.13M
YoY Change	-8.17%
Intangibles	$9.892M		$5.644M
YoY Change	75.27%
Long-Term Investments	$97.12M	$97.12M
YoY Change
Other Assets	$38.59M	$38.59M	$8.263M
YoY Change	367.05%	367.05%
Total Long-Term Assets	$468.1M	$468.1M	$287.5M
YoY Change	62.81%	62.81%
TOTAL ASSETS
Total Short-Term Assets	$291.6M	$291.6M	$25.10M
Total Long-Term Assets	$468.1M	$468.1M	$287.5M
Total Assets	$759.7M	$759.7M	$312.6M
YoY Change	143.0%	143.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$6.024M	$6.024M	$7.152M
YoY Change	-15.77%	-15.77%
Accrued Expenses	$65.18M	$65.18M
YoY Change		11.11%
Deferred Revenue	$5.000M		$820.0K
YoY Change	509.76%
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$98.39M	$98.39M	$75.87M
YoY Change	29.68%	29.68%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$2.122M	$301.5M	$2.490M
YoY Change	-14.78%	85.95%
Total Long-Term Liabilities	$2.122M	$301.5M	$2.490M
YoY Change	-14.78%	85.95%
TOTAL LIABILITIES
Total Short-Term Liabilities	$98.39M	$98.39M	$75.87M
Total Long-Term Liabilities	$2.122M	$301.5M	$2.490M
Total Liabilities	$399.9M	$399.9M	$238.0M
YoY Change	68.01%	68.01%
SHAREHOLDERS EQUITY
Retained Earnings	-$39.49M		$0.00
YoY Change
Common Stock	$2.000K		$0.00
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$359.8M	$359.8M	$74.63M
YoY Change
Total Liabilities & Shareholders Equity	$759.7M	$759.7M	$312.6M
YoY Change	143.0%	143.0%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	-$60.98M	-$292.2M	-$120.1M
YoY Change	-49.23%	143.27%
Depreciation, Depletion And Amortization	$3.535M	$16.35M	$6.657M
YoY Change	-46.9%	23.98%
Cash From Operating Activities	-$57.44M	-$207.0M	-$116.7M
YoY Change	-50.8%	205.34%
INVESTING ACTIVITIES
Capital Expenditures	-$975.0K	$11.58M	-$10.67M
YoY Change	-90.86%	-48.0%
Acquisitions
YoY Change
Other Investing Activities	$34.99M	$34.99M
YoY Change
Cash From Investing Activities	$34.01M	$15.41M	-$10.67M
YoY Change	-418.72%	-169.23%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	186.7M	$354.9M	127.4M
YoY Change	46.53%	294.08%
NET CHANGE
Cash From Operating Activities	-57.44M	-$207.0M	-116.7M
Cash From Investing Activities	34.01M	$15.41M	-10.67M
Cash From Financing Activities	186.7M	$354.9M	127.4M
Net Change In Cash	163.3M	$163.3M	0.000
YoY Change
FREE CASH FLOW
Cash From Operating Activities	-$57.44M	-$207.0M	-$116.7M
Capital Expenditures	-$975.0K	$11.58M	-$10.67M
Free Cash Flow	-$56.46M	-$218.6M	-$106.1M
YoY Change	-46.77%	142.72%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001860782
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CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-40791
CY2021	dei	Entity Registrant Name EntityRegistrantName	2seventy bio, Inc.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	86-3658454
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	60 Binney Street
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Cambridge
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	MA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	02142
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CY2021	dei	Local Phone Number LocalPhoneNumber	499-9300
CY2021	dei	Security12b Title Security12bTitle	Common Stock, par value $0.0001 per share
CY2021	dei	Trading Symbol TradingSymbol	TSVT
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CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	62049000	USD
CY2019	tsvt	Transfers From Transfers To Net Parent Investment TransfersFromTransfersToNetParentInvestment	267722000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-320594000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	43692000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	60997000	USD
CY2020	tsvt	Transfers From Transfers To Net Parent Investment TransfersFromTransfersToNetParentInvestment	90054000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-120114000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	74629000	USD
CY2021	tsvt	Share Based Payment Arrangement Increase For Cost Recognition From Parent ShareBasedPaymentArrangementIncreaseForCostRecognitionFromParent	44626000	USD
CY2021	tsvt	Transfers From Transfers To Net Parent Investment TransfersFromTransfersToNetParentInvestment	517706000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9012000	USD
CY2021	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	6544000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-482000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-292213000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	359822000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-292213000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-120114000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-320594000	USD
CY2021	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	439000	USD
CY2020	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-6468000	USD
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	2747000	USD
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CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	13188000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	12587000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	54629000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	60997000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	62049000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-430000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-73000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-110000	USD
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CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1526000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-6700000	USD
CY2021	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	15541000	USD
CY2020	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	13764000	USD
CY2019	tsvt	Increase Decrease In Operating Lease Right Of Use Asset IncreaseDecreaseInOperatingLeaseRightOfUseAsset	12214000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-6000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-13240000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	14611000	USD
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	15733000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-7479000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	26341000	USD
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-16199000	USD
CY2020	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-10960000	USD
CY2019	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-2309000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	4180000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	8317000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-16674000	USD
CY2021	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	7496000	USD
CY2020	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	7397000	USD
CY2019	tsvt	Increase Decrease In Collaboration Research Advancement IncreaseDecreaseInCollaborationResearchAdvancement	5739000	USD
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CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-67793000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-207957000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	11575000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22261000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	59765000	USD
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CY2021	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	8000000	USD
CY2020	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2019	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	15411000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-22261000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-59765000	USD
CY2021	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	354889000	USD
CY2020	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	90054000	USD
CY2019	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	267722000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	354889000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	90054000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	267722000	USD
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CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	0	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	0	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	163266000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	130414000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	0	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	0	USD
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	32852000	USD
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	0	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	163266000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	0	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3703000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2039000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3064000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	4989000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9745000	USD
CY2021	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	110300000	USD
CY2020	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	0	USD
CY2019	tsvt	Noncash Or Part Noncash Transfer To Net Parent Investment NoncashOrPartNoncashTransferToNetParentInvestment	0	USD
CY2021	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	174618000	USD
CY2020	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	0	USD
CY2019	tsvt	Increase Of Right Of Use Asset And Associated Lease Liability Due To Reassessment IncreaseOfRightOfUseAssetAndAssociatedLeaseLiabilityDueToReassessment	0	USD
CY2021	us-gaap	Stock Issued1 StockIssued1	6544000	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2021	us-gaap	Nature Of Operations NatureOfOperations	Description of the business<div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2seventy bio, Inc. (the “Company” or “2seventy bio”) is a cell and gene therapy company focused on the research, development, and commercialization of transformative treatments for cancer. The Company’s approach combines its expertise in T cell engineering technology and lentiviral vector gene delivery approaches, experience in research, development, and manufacturing of cell therapies and a suite of technologies that can be selectively deployed to develop highly innovative, targeted cellular therapies for patients with cancer. The Company is advancing multiple preclinical and clinical programs in oncology and, together with Bristol Myers Squibb (“BMS”), delivering the first FDA-approved CAR T therapy in multiple myeloma, ABECMA (idecabtagene vicleucel, or ide-cel), to patients in the United States. Please refer to Note 10, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Collaborative arrangements and strategic partnerships</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, for further discussion of the collaboration with BMS. </span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">2seventy bio Securities Corporation is a wholly-owned subsidiary of the Company which was incorporated in Massachusetts on December 13, 2021 and was granted securities corporation status in Massachusetts for the 2021 tax year. 2seventy bio Securities Corporation has no employees.</span></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">The separation</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In January 2021, bluebird bio, Inc. ("bluebird bio") announced its plans to separate its oncology portfolio and programs from its severe genetic disease (“SGD”) portfolio and programs through a pro rata distribution of 2seventy bio's common stock to stockholders of bluebird bio. As a part of the separation, bluebird bio transferred the assets, liabilities and operations of its oncology portfolio and programs to 2seventy bio, pursuant to the terms of the separation agreement entered into between 2seventy bio and bluebird bio on November 3, 2021. On November 4, 2021, the distribution date, each bluebird bio stockholder received a pro rata share of 2seventy bio's common stock for every share of bluebird bio common stock held of record at the close of business on the record date for the distribution. Registered stockholders received cash in lieu of any fractional shares of 2seventy bio's common stock that they would have received as a result of the application of the distribution ratio. Following the distribution, 2seventy bio began to operate as a separate, independent, publicly traded company. </span></div><div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Going concern</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In accordance with Accounting Standards Codification (“ASC”) 205-40, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Going Concern</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, the Company evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about its ability to continue as a going concern within one year after the date that the consolidated and combined financial statements are issued. The Company has incurred losses and has experienced negative operating cash flows for all historical periods presented. During the year ended December 31, 2021, the Company incurred a net loss of $292.2 million and used $207.0 million of cash in operations. The Company expects to continue to generate operating losses and negative operating cash flows for the next few years. The Company's continued operations are dependent on its ability to raise additional funding. </span></div>As of December 31, 2021, the Company had cash, cash equivalents, and marketable securities of $362.2 million. The Company expects that its cash, cash equivalents, and marketable securities will be sufficient to fund current planned operations for at least the next twelve months from the date of issuance of these financial statements. The Company intends to pursue additional cash resources through a combination of public or private equity offerings, debt financings, collaborations, strategic alliances or licensing arrangements with third parties. There can be no assurance that such financing will be available in sufficient amounts or on acceptable terms, if at all, and some could be dilutive to existing stockholders. If the Company is unable to obtain additional funding on a timely basis, it may be forced to significantly curtail, delay, or discontinue one or more of its planned research or development programs or be unable to expand its operations.
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-292200000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-207000000	USD
CY2021Q4	tsvt	Cash Cash Equivalents And Marketable Securities CashCashEquivalentsAndMarketableSecurities	362200000	USD
CY2021	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent	354900000	USD
CY2021Q4	tsvt	Spinoff Transaction Recognized Identifiable Assets Acquired And Liabilities Assumed Net SpinoffTransactionRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet	384500000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of estimates</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the financial statements and accompanying notes. Actual results could materially differ from those estimates. Management considers many factors in selecting appropriate financial accounting policies and controls, and in developing the estimates and assumptions that are used in the preparation of these financial statements. Management must apply significant judgment in this process. In addition, other factors may affect estimates, including: expected business and operational changes, sensitivity and volatility associated with the assumptions used in developing estimates, and whether historical trends are expected to be representative of </span></div><div style="margin-bottom:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">future trends. The estimation process often may yield a range of potentially reasonable estimates of the ultimate future outcomes and management must select an amount that falls within that range of reasonable estimates. This process may result in actual results differing materially from those estimated amounts used in the preparation of the financial statements.</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Estimates and judgments are used in the following areas, among others: allocations of revenue, expenses, assets and liabilities from bluebird bio's historical consolidated financial statements to the Company for periods prior to the separation, future undiscounted cash flows and subsequent fair value estimates used to assess potential and measure any impairment of long-lived assets, including goodwill and intangible assets, the measurement of right-of-use assets and lease liabilities, contingent consideration, stock-based compensation expense, accrued expenses, income taxes, and the assessment of the Company's ability to fund its operations for at least the next twelve months from the date of issuance of these financial statements. In addition, estimates and judgments are used in the Company’s accounting for its revenue-generating arrangements, in particular as it relates to determining the stand-alone selling price of performance obligations, evaluating whether an option to acquire additional goods and services represents a material right, estimating the total transaction price, including estimating variable consideration and the probability of achieving future potential development and regulatory milestones, assessing the period of performance over which revenue may be recognized, and accounting for modifications to revenue-generating arrangements.</span></div>
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:9pt;margin-top:6pt;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentrations of credit risk and off-balance sheet risk</span></div><div style="margin-bottom:9pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments that subject the Company to credit risk primarily consist of cash and cash equivalents, available-for-sale securities, and accounts receivable. The Company maintains its cash and cash equivalent balances with high-quality financial institutions and, consequently, the Company believes that such funds are subject to minimal credit risk. The Company’s marketable securities, which primarily consist of U.S. government agency securities and treasuries, corporate bonds and commercial paper, potentially subject the Company to concentrations of credit risk. The Company has adopted an investment policy that limits the amounts the Company may invest in any one type of investment and requires all investments held by the Company to be at least AA+/Aa1 rated, thereby reducing credit risk exposure. The Company’s accounts receivable balance primarily consists of amounts owed from collaborative arrangement partners and royalties receivable under out-license agreements with various third parties. The Company monitors economic conditions to identify facts or circumstances that may indicate that any of its accounts receivable are at risk of collection.</span></div>
CY2021Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	0	USD
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CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	565000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	231767000	USD
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CY2021	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2021Q4	us-gaap	Interest Receivable InterestReceivable	400000	USD
CY2021	tsvt	Interest Receivable Write Off InterestReceivableWriteOff	0	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	160130000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	565000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	160130000	USD
CY2021Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	565000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	74991000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	174062000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	40078000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	30037000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	34913000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	144025000	USD
CY2021	us-gaap	Depreciation Depreciation	12100000	USD
CY2020	us-gaap	Depreciation Depreciation	9400000	USD
CY2019	us-gaap	Depreciation Depreciation	8800000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	24655000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	9451000	USD
CY2021Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	6768000	USD
CY2020Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	1493000	USD
CY2021Q4	tsvt	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	5459000	USD
CY2020Q4	tsvt	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	6808000	USD
CY2021Q4	tsvt	Accrued Clinical And Contract Research Organization Costs Current AccruedClinicalAndContractResearchOrganizationCostsCurrent	3229000	USD
CY2020Q4	tsvt	Accrued Clinical And Contract Research Organization Costs Current AccruedClinicalAndContractResearchOrganizationCostsCurrent	2854000	USD
CY2021Q4	tsvt	Accrued Collaboration Research Costs Current AccruedCollaborationResearchCostsCurrent	2576000	USD
CY2020Q4	tsvt	Accrued Collaboration Research Costs Current AccruedCollaborationResearchCostsCurrent	19605000	USD
CY2021Q4	tsvt	Accrued Property Plant And Equipment Current AccruedPropertyPlantAndEquipmentCurrent	2241000	USD
CY2020Q4	tsvt	Accrued Property Plant And Equipment Current AccruedPropertyPlantAndEquipmentCurrent	440000	USD
CY2021Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	1688000	USD
CY2020Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	0	USD
CY2021Q4	tsvt	Accrued Separation Related Costs Current AccruedSeparationRelatedCostsCurrent	762000	USD
CY2020Q4	tsvt	Accrued Separation Related Costs Current AccruedSeparationRelatedCostsCurrent	0	USD
CY2021Q4	tsvt	Accrued License And Milestone Fees AccruedLicenseAndMilestoneFees	123000	USD
CY2020Q4	tsvt	Accrued License And Milestone Fees AccruedLicenseAndMilestoneFees	278000	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	7909000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	2418000	USD
CY2021Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	55410000	USD
CY2020Q4	us-gaap	Accrued Liabilities And Other Liabilities AccruedLiabilitiesAndOtherLiabilities	43347000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	24838000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	22454000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	21406000	USD
CY2021	us-gaap	Lease Cost LeaseCost	24838000	USD
CY2020	us-gaap	Lease Cost LeaseCost	22454000	USD
CY2019	us-gaap	Lease Cost LeaseCost	21406000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	25489000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	19632000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	19521000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y9M18D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y4M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y4M24D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0547
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0672
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0673
CY2021	us-gaap	Operating Lease Expense OperatingLeaseExpense	34500000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	32500000	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	30600000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	27078000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	27864000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	28675000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	29501000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	32920000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	250383000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	396421000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	114206000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	282215000	USD
CY2021Q4	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	15750000	USD
CY2021Q4	us-gaap	Purchase Obligation PurchaseObligation	15750000	USD
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2021Q4	tsvt	Common Stock Number Of Votes Per Common Share CommonStockNumberOfVotesPerCommonShare	1	vote
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	23600000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	23600000	shares
CY2020Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	0	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	0	shares
CY2021Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	5686000	shares
CY2020Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	0	shares
CY2021Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	38600000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	28708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9892000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	30100000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	24456000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	5644000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4300000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3800000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3800000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	2590000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	708000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	4470000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9892000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	1500000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	1300000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	54600000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	61000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	62000000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	54629000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	60997000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	62049000	USD
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	54629000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	60997000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	62049000	USD
CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	25000000	USD
CY2020Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	38500000	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	1200000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y9M29D
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y10D
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y1M2D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2021	tsvt	Share Based Compensation Arrangement By Share Based Payment Award Options Converted In Distribution ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConvertedInDistribution	875000	shares
CY2021	tsvt	Share Based Compensation Arrangements By Share Based Payment Award Options Converted In Distribution Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsConvertedInDistributionWeightedAverageExercisePrice	129.67
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	2000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	157.43
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	873000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	129.60
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y7M6D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	131000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	518000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	161.76
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y2M12D
CY2021Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	131000	USD
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber	873000	shares
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice	129.60
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Outstanding Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1	P6Y7M6D
CY2021Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Outstanding Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue	131000	USD
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Vested SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested	100000	USD
CY2021Q4	tsvt	Number Of Transition Services Agreements NumberOfTransitionServicesAgreements	2	agreement
CY2021Q4	tsvt	Transition Services Agreement Initial Term TransitionServicesAgreementInitialTerm	P2Y
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2400000	USD
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2200000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-292213000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-120114000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-320594000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	0	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	0	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-292213000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-120114000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-320594000	USD
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.006
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.038
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.055
CY2021	tsvt	Effective Income Tax Rate Reconciliation Permanent Differences EffectiveIncomeTaxRateReconciliationPermanentDifferences	0
CY2020	tsvt	Effective Income Tax Rate Reconciliation Permanent Differences EffectiveIncomeTaxRateReconciliationPermanentDifferences	0.003
CY2019	tsvt	Effective Income Tax Rate Reconciliation Permanent Differences EffectiveIncomeTaxRateReconciliationPermanentDifferences	-0.001
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.003
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.041
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	-0.005
CY2021	tsvt	Effective Income Tax Rate Reconciliation Tax Credits Research And Development EffectiveIncomeTaxRateReconciliationTaxCreditsResearchAndDevelopment	0.002
CY2020	tsvt	Effective Income Tax Rate Reconciliation Tax Credits Research And Development EffectiveIncomeTaxRateReconciliationTaxCreditsResearchAndDevelopment	0.138
CY2019	tsvt	Effective Income Tax Rate Reconciliation Tax Credits Research And Development EffectiveIncomeTaxRateReconciliationTaxCreditsResearchAndDevelopment	0.056
CY2021	tsvt	Effective Income Tax Rate Reconciliation Officer Compensation Limitation EffectiveIncomeTaxRateReconciliationOfficerCompensationLimitation	-0.004
CY2020	tsvt	Effective Income Tax Rate Reconciliation Officer Compensation Limitation EffectiveIncomeTaxRateReconciliationOfficerCompensationLimitation	-0.016
CY2019	tsvt	Effective Income Tax Rate Reconciliation Officer Compensation Limitation EffectiveIncomeTaxRateReconciliationOfficerCompensationLimitation	-0.007
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	-0.004
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.011
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.002
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.648
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.321
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.302
CY2021	tsvt	Effective Income Tax Rate Reconciliation Spin Off Adjustment Percent EffectiveIncomeTaxRateReconciliationSpinOffAdjustmentPercent	-0.854
CY2020	tsvt	Effective Income Tax Rate Reconciliation Spin Off Adjustment Percent EffectiveIncomeTaxRateReconciliationSpinOffAdjustmentPercent	0
CY2019	tsvt	Effective Income Tax Rate Reconciliation Spin Off Adjustment Percent EffectiveIncomeTaxRateReconciliationSpinOffAdjustmentPercent	0
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	12142000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	149570000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	466000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	49379000	USD
CY2021Q4	tsvt	Deferred Tax Assets Capitalized License Fee And Research And Development Expenses DeferredTaxAssetsCapitalizedLicenseFeeAndResearchAndDevelopmentExpenses	11905000	USD
CY2020Q4	tsvt	Deferred Tax Assets Capitalized License Fee And Research And Development Expenses DeferredTaxAssetsCapitalizedLicenseFeeAndResearchAndDevelopmentExpenses	13091000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	13724000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	15348000	USD
CY2021Q4	tsvt	Deferred Tax Assets Stock Based Compensation DeferredTaxAssetsStockBasedCompensation	15824000	USD
CY2020Q4	tsvt	Deferred Tax Assets Stock Based Compensation DeferredTaxAssetsStockBasedCompensation	21400000	USD
CY2021Q4	tsvt	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	71941000	USD
CY2020Q4	tsvt	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	34119000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	5395000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	2715000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	131397000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	285622000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	476000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	1509000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	69693000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	31139000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2958000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	5477000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	58270000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	247497000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	0	USD
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	58300000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	3070000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1333000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4403000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	36000	USD
CY2021	tsvt	Unrecognized Tax Benefits Decrease Resulting From Gross Spin Off Adjustment UnrecognizedTaxBenefitsDecreaseResultingFromGrossSpinOffAdjustment	4403000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	36000	USD
CY2020Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2021Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2019Q4	us-gaap	Income Tax Examination Penalties And Interest Accrued IncomeTaxExaminationPenaltiesAndInterestAccrued	0	USD
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	2570000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares

Files In Submission

Name	View Source	Status
0001860782-22-000005-index-headers.html	Edgar Link	pending
0001860782-22-000005-index.html	Edgar Link	pending
0001860782-22-000005.txt	Edgar Link	pending
0001860782-22-000005-xbrl.zip	Edgar Link	pending
exhibit1013.htm	Edgar Link	pending
exhibit1013001.jpg	Edgar Link	pending
exhibit1013002.jpg	Edgar Link	pending
exhibit1013003.jpg	Edgar Link	pending
exhibit1013004.jpg	Edgar Link	pending
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exhibit1013006.jpg	Edgar Link	pending
exhibit1013007.jpg	Edgar Link	pending
exhibit1013008.jpg	Edgar Link	pending
exhibit1013009.jpg	Edgar Link	pending
exhibit1013010.jpg	Edgar Link	pending
exhibit1014.htm	Edgar Link	pending
exhibit1014001.jpg	Edgar Link	pending
exhibit1014002.jpg	Edgar Link	pending
eyconsentexhibit231.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
tsvt-20211231.htm	Edgar Link	pending
tsvt-20211231.xsd	Edgar Link	pending
tsvt-20211231_cal.xml	Edgar Link	unprocessable
tsvt-20211231_def.xml	Edgar Link	unprocessable
tsvt-20211231_g1.jpg	Edgar Link	pending
tsvt-20211231_htm.xml	Edgar Link	completed
tsvt-20211231_lab.xml	Edgar Link	unprocessable
tsvt-20211231_pre.xml	Edgar Link	unprocessable
tsvt-ex44descriptionofsecu.htm	Edgar Link	pending
tsvt-q410xkex311leschly.htm	Edgar Link	pending
tsvt-q410xkexhibit312baird.htm	Edgar Link	pending
tsvt-q4202110xkex104nonxem.htm	Edgar Link	pending
tsvt-q4202110xkexhibit1012.htm	Edgar Link	pending
tsvt-q4202110xkexhibit211.htm	Edgar Link	pending
tsvt-q4202110xkexhibit321.htm	Edgar Link	pending

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$TSVT
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2021 Q4 Form 10-K Financial Statement

#000186078222000005 Filed on March 22, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TSVT 2Seventy Bio Inc Stock $tsvt

2021 Q4 Form 10-K Financial Statement

#000186078222000005 Filed on March 22, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$TSVT
2Seventy Bio Inc Stock $tsvt