$KRRO

$13.30 +$1.28 (10.65%) Close

$KRRO Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 14.7M shares outstanding

Who owns KRRO?

By type of holder

Institutions 95.1% Insiders 4.9% Everyone else 0.0%

Concentration Top 10 holders own 98.3%

Lynx1 Capital Management LP 10.5% · Ali Behbahani 9.9%

Institutional ownership

95.1%

+8.9 pts vs last qtr

Institutional holders

104

+6 vs last qtr

Net shares bought

+1.3M

by institutions in Q2 2026

New / sold out

20 / 14

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +357.6K
Adage Capital Partners GP, L.L.C. +312.6K

Biggest sellers in Q2 2026

Atlas Venture Life Science Advisors, LLC −174.3K
Jane Street Group, LLC SOLD OUT −115.7K

Who is planning to sell?

Notices of proposed sale, last 12 months

$6.36M

29 notices from 7 people

Shares covered

427.0K

2.90% of the company

Arranged in advance

84%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Atlas Venture Fund XI, L.P. Shareholder 10b5-1 $4.33M
Atlas Venture Opportunity Fund II, L.P. Shareholder 10b5-1 $892K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2024–FY2025

+5.3%

+5.32% a year

Each share's claim on the business

−5.1%

shrank without buying or selling a share

Diluted shares, split-adjusted

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years43% Under 1 year57%

Quarterly turnover

10.0%

of institutional shares changed hands

Top 10 managers, median time held

2 quarters

Super Investors

Investment managers reporting KRRO on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
LC Lynx1 Capital Management LP	1.5M	10.45%	Unchanged	Q4 '25	2.3%
Shares held by quarter Peak holding1.5M (Q1'26) Change over 8 quarters+1.5M Share of the company10.450% Lynx1 Capital Management LP's full portfolio →
NM NEA Management Company, LLC	1.3M	8.81%	Unchanged	2023	1.1%
Shares held by quarter Peak holding1.3M (Q1'26) Change over 8 quarters+207.1K Share of the company8.810% NEA Management Company, LLC's full portfolio →

Lynx1 Capital Management LP

1.5M

% of company

10.45%

Change vs last qtr

Unchanged

Held since

Q4 '25

NEA Management Company, LLC

1.3M

% of company

8.81%

Change vs last qtr

Unchanged

Held since

2023

28 more super investors behind a free account

See every manager holding Korro Bio, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting KRRO on Form N-PORT; together they hold 10.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$4.1M	311.3K	2.11%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$3.47M	262.9K	1.79%	0.00%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$4.1M

% of company

2.11%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$3.47M

% of company

1.79%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Korro Bio, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
AB Ali Behbahani 5%+ holder 13D · 9.9%	1.5M	9.89%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company9.890% Disclosed stake13D · 9.9% View the 13D/G filing →
AA Anthony A. Florence, Jr. 5%+ holder 13D · 9.9%	1.4M	9.75%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company9.750% Disclosed stake13D · 9.9% View the 13D/G filing →

Ali Behbahani

5%+ holder13D · 9.9%

1.5M

% of company

9.89%

Change vs last qtr

—

Held since

—

Anthony A. Florence, Jr.

5%+ holder13D · 9.9%

1.4M

% of company

9.75%

Change vs last qtr

—

Held since

—

22 more holders behind a free account

See every insider and 5%+ holder of Korro Bio, Inc..

Comments