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Super Investors Casdin Capital, LLC
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Casdin Capital, LLC

Quarterly 13F snapshot: US-listed longs only, no performance figures — 13F data cannot support them.

Portfolio value
$2B
Positions
43
Quarter ended
June 30, 2026
Filed
August 14, 2026

Reported portfolio value by quarter (43 quarters reported)

$4.02B $87.1M
Q4 15 Q1 18 Q2 20 Q3 22 Q4 24 Q2 26

$113M in Q4 2015 → $2B now. Hover for any quarter.

Holdings

As reported for the quarter ended June 30, 2026. Activity is the change in share count since the prior quarter's filing.

Holding % of portfolio Activity Shares Value
Revolution Medicines Inc 24.2% Unchanged 2,577,333 $483M
Relay Therapeutics Inc 15.0% Added 11% 16,035,240 $300M
Genedx Holdings Corp 12.7% Added 23% 3,707,164 $254M
Biolife Solutions Inc 6.6% Trimmed 22% 4,655,000 $131M
Illumina Inc 4.7% Unchanged 530,000 $93.2M
Standard Biotools Inc 3.7% Unchanged 88,783,856 $73M
Structure Therapeutics Inc 3.2% Unchanged 1,175,000 $63.1M
Denali Therapeutics Inc 2.6% Added 11% 2,045,000 $52.6M
Neurogene Inc 2.4% Added 8.8% 1,545,361 $48.6M
Beam Therapeutics Inc 2.3% Unchanged 1,350,000 $46.3M
10x Genomics Inc 2.0% Trimmed 54% 1,050,000 $40.3M
SR Scholar Rock Hldg Corp 1.8% Added 90% 665,000 $36.6M
Personalis Inc 1.7% Added 59% 2,550,000 $34.2M
Grail Inc 1.6% Added 109% 480,000 $32.8M
Guardant Health Inc 1.4% Trimmed 41% 185,000 $27.8M
Maze Therapeutics Inc 1.3% Added 11% 843,857 $25.2M
Hims & Hers Health Inc 1.2% Unchanged 700,000 $24.3M
Alnylam Pharmaceuticals Inc 1.1% Unchanged 75,000 $22.6M
Taysha Gene Therapies Inc 1.1% Unchanged 3,250,000 $22.1M
Agomab Therapeutics Nv 1.0% Unchanged 1,550,000 $20.1M
Septerna Inc 0.9% Unchanged 553,268 $18.5M
PM Parabilis Medicines Inc 0.9% New 645,690 $17.7M
Sionna Therapeutics Inc 0.9% New 400,000 $17.6M
Veracyte Inc 0.8% Unchanged 276,308 $16.2M
AN Adlai Nortye Ltd 0.7% Added 132% 1,250,000 $14.4M
Prime Medicine Inc 0.6% Unchanged 3,167,175 $11.7M
Absci Corporation 0.6% Unchanged 973,260 $11.3M
Quest Diagnostics Inc 0.5% Unchanged 50,000 $10.6M
Sarepta Therapeutics Inc 0.4% New 470,000 $8.45M
UN Uniqure Nv 0.3% New 150,000 $6.91M
Intellia Therapeutics Inc 0.3% Unchanged 355,000 $6.01M
Moderna Inc 0.3% Unchanged 75,000 $5.25M
Disc Medicine Inc 0.2% Unchanged 65,000 $4.75M
Monte Rosa Therapeutics Inc 0.2% Unchanged 186,014 $4.5M
Century Therapeutics Inc 0.2% Unchanged 1,228,190 $3.01M
Contineum Therapeutics Inc 0.1% Unchanged 148,333 $2.43M
BO Bridgebio Oncology Therapeut 0.1% Unchanged 282,312 $2.15M
Editas Medicine Inc 0.1% New 445,000 $1.44M
PB Pacific Biosciences Calif In 0.1% Unchanged 723,767 $1.22M
K Kardigan Inc 0.1% New 50,000 $1.19M
RP Recursion Pharmaceuticals In 0.0% Unchanged 165,323 $607K
Ginkgo Bioworks Holdings Inc 0.0% Unchanged 36,493 $362K
Tenaya Therapeutics Inc 0.0% Unchanged 361,969 $268K

Timeline of changes

What changed each quarter, from the filings' own share counts. Largest moves first; most recent 8 quarters.

Q2 2026

quarter ended June 30, 2026 · filed August 14, 2026

Company Action Shares changed Value of change % of portfolio
Genedx Holdings Corp Added +700,000 +$48.1M 12.7%
10x Genomics Inc Trimmed −1,225,000 −$47M 2.0%
Biolife Solutions Inc Trimmed −1,302,165 −$36.8M 6.6%
Relay Therapeutics Inc Added +1,616,666 +$30.2M 15.0%
Guardant Health Inc Trimmed −130,000 −$19.5M 1.4%
PM Parabilis Medicines Inc New +645,690 +$17.7M 0.9%
Sionna Therapeutics Inc New +400,000 +$17.6M 0.9%
SR Scholar Rock Hldg Corp Added +315,000 +$17.3M 1.8%
Grail Inc Added +250,000 +$17.1M 1.6%
QN Qiagen Nv Exited −360,000 −$14.4M —

Showing the 10 largest of 21 changes.

Q1 2026

quarter ended March 31, 2026 · filed May 15, 2026

Company Action Shares changed Value of change % of portfolio
Avidity Biosciences Inc Exited −1,000,000 −$72.1M —
Ars Pharmaceuticals Inc Exited −1,600,000 −$18.6M —
10x Genomics Inc Added +875,000 +$18.6M 3.7%
Unitedhealth Group Inc Exited −50,000 −$16.5M —
Agomab Therapeutics Nv New +1,550,000 +$16.3M 1.2%
QN Qiagen Nv New +360,000 +$14.4M 1.1%
Relay Therapeutics Inc Added +1,415,000 +$14.1M 10.9%
Grail Inc New +230,000 +$11.9M 0.9%
Dexcom Inc Exited −175,000 −$11.6M —
The Cigna Group Exited −40,000 −$11M —

Showing the 10 largest of 27 changes.

Q4 2025

quarter ended December 31, 2025 · filed February 17, 2026

Company Action Shares changed Value of change % of portfolio
Avidity Biosciences Inc Trimmed −780,000 −$56.3M 4.5%
Guardant Health Inc Added +280,000 +$28.6M 2.4%
Structure Therapeutics Inc Trimmed −380,000 −$26.4M 5.1%
10x Genomics Inc New +1,400,000 +$22.8M 1.4%
Biolife Solutions Inc Trimmed −750,000 −$18.1M 8.9%
Denali Therapeutics Inc Added +950,000 +$15.7M 1.9%
Standard Biotools Inc Added +11,225,000 +$14.4M 7.1%
Relay Therapeutics Inc Added +1,662,193 +$14.1M 6.8%
Dexcom Inc New +175,000 +$11.6M 0.7%
SR Scholar Rock Hldg Corp New +260,000 +$11.5M 0.7%

Showing the 10 largest of 21 changes.

Q3 2025

quarter ended September 30, 2025 · filed November 14, 2025

Company Action Shares changed Value of change % of portfolio
Genedx Holdings Corp Trimmed −500,000 −$53.9M 27.0%
Verve Therapeutics Inc Exited −4,095,571 −$46M —
Biolife Solutions Inc Trimmed −1,000,000 −$25.5M 14.3%
Tempus Ai Inc New +294,127 +$23.7M 2.0%
Codexis Inc Exited −7,200,000 −$17.6M —
Sarepta Therapeutics Inc Exited −990,097 −$16.9M —
Ars Pharmaceuticals Inc New +1,600,000 +$16.1M 1.3%
Alnylam Pharmaceuticals Inc Trimmed −26,500 −$12.1M 2.1%
Illumina Inc Trimmed −120,000 −$11.4M 4.2%
Revolution Medicines Inc Trimmed −240,600 −$11.2M 10.3%

Showing the 10 largest of 22 changes.

Q2 2025

quarter ended June 30, 2025 · filed August 14, 2025

Company Action Shares changed Value of change % of portfolio
Revolution Medicines Inc Trimmed −810,000 −$29.8M 9.7%
Blueprint Medicines Corp Exited −326,378 −$28.9M —
Biolife Solutions Inc Trimmed −1,000,000 −$21.5M 15.1%
Exact Sciences Corp Trimmed −315,000 −$16.7M 0.4%
Intellia Therapeutics Inc Exited −2,000,000 −$14.2M —
Alnylam Pharmaceuticals Inc Trimmed −38,500 −$12.6M 2.4%
Structure Therapeutics Inc Added +525,000 +$10.9M 2.3%
B Beigene Ltd Exited −40,000 −$10.9M —
2seventy Bio Inc Exited −2,000,000 −$9.88M —
GH Ge Healthcare Technologies I Exited −100,000 −$8.07M —

Showing the 10 largest of 34 changes.

Q1 2025

quarter ended March 31, 2025 · filed May 15, 2025

Company Action Shares changed Value of change % of portfolio
Illumina Inc Trimmed −155,000 −$12.3M 3.9%
Sarepta Therapeutics Inc Trimmed −172,717 −$11M 4.7%
B Beigene Ltd New +40,000 +$10.9M 0.9%
Exact Sciences Corp Trimmed −245,000 −$10.6M 1.4%
Maze Therapeutics Inc New +946,357 +$10.4M 0.9%
GH Ge Healthcare Technologies I New +100,000 +$8.07M 0.7%
Moderna Inc Exited −175,000 −$7.28M —
4M 4d Molecular Therapeutics In Exited −1,150,000 −$6.41M —
Hims & Hers Health Inc New +200,000 +$5.91M 0.5%
Alnylam Pharmaceuticals Inc Trimmed −20,000 −$5.4M 2.6%

Showing the 10 largest of 26 changes.

Q4 2024

quarter ended December 31, 2024 · filed February 14, 2025

Company Action Shares changed Value of change % of portfolio
Revolution Medicines Inc Trimmed −415,000 −$18.2M 10.8%
Neurogene Inc Added +770,745 +$17.6M 2.0%
Veracyte Inc Trimmed −390,000 −$15.4M 0.7%
Septerna Inc New +553,268 +$12.7M 0.8%
Beam Therapeutics Inc Added +475,000 +$11.8M 2.1%
Agios Pharmaceuticals Inc New +250,000 +$8.22M 0.5%
Moderna Inc New +175,000 +$7.28M 0.5%
Moderna Inc New +175,000 +$7.28M 0.5%
Alnylam Pharmaceuticals Inc Trimmed −30,000 −$7.06M 2.2%
FH Fortrea Hldgs Inc New +275,000 +$5.13M 0.3%

Showing the 10 largest of 16 changes.

Q3 2024

quarter ended September 30, 2024 · filed November 14, 2024

Company Action Shares changed Value of change % of portfolio
Illumina Inc Added +270,000 +$35.2M 6.5%
Codexis Inc Added +6,100,000 +$18.8M 1.7%
Standard Biotools Inc Added +7,295,000 +$14.1M 9.2%
Revolution Medicines Inc Trimmed −292,592 −$13.3M 12.4%
Pliant Therapeutics Inc Exited −1,000,000 −$10.8M —
Denali Therapeutics Inc Trimmed −310,000 −$9.03M 1.9%
Veracyte Inc Trimmed −191,596 −$6.52M 1.5%
Syndax Pharmaceuticals Inc Added +325,000 +$6.26M 0.6%
Guardant Health Inc Added +250,000 +$5.74M 0.5%
Relay Therapeutics Inc Added +802,534 +$5.68M 4.4%

Showing the 10 largest of 21 changes.

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