Cogent Biosciences, Inc. (COGT) Ownership
COGT ownership summary
as of October 18, 2026- Institutions
- 115.2% of shares outstanding
- Insiders
- 0.42% of shares outstanding
- Shares outstanding
- 173.5M
- Float
- 172.6M shares available to trade
- Short interest
- 11.28% 19.5M shares short
- Days to cover
- 9.63 short interest up 7.4% vs prior month
- Institutions 115.21%
- Insiders 0.42%
COGT top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | FMR Inc | 14.80% | 25.7M | $758.1M | +2.6M (+11.1%) | June 30, 2026 |
| 2 | BlackRock Inc | 10.00% | 17.4M | $512.3M | +1.3M (+8.1%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 4.65% | 8.1M | $238.3M | +739,078 (+10.1%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.27% | 7.4M | $218.8M | +517,371 (+7.5%) | June 30, 2026 |
| 5 | State Street Corp | 4.01% | 7.0M | $205.6M | +1.3M (+23.0%) | June 30, 2026 |
| 6 | Jupiter Topco LLC | 3.82% | 6.6M | $195.6M | +6.6M (0.0%) | June 30, 2026 |
| 7 | HHG PLC | 3.44% | 6.0M | $176.1M | +1.4M (+31.5%) | March 31, 2026 |
| 8 | Fairmount Funds Management LLC | 3.17% | 5.5M | $162.5M | — | June 30, 2026 |
| 9 | Deerfield Management Co | 2.88% | 5.0M | $147.8M | −4.0M (−44.6%) | June 30, 2026 |
| 10 | TCG Crossover Management, LLC | 2.80% | 4.9M | $143.3M | −92,458 (−1.9%) | June 30, 2026 |
| 11 | T. Rowe Price Associates, Inc. | 2.68% | 4.7M | $137.3M | +1.4M (+44.8%) | June 30, 2026 |
| 12 | Geode Capital Management, LLC | 2.60% | 4.5M | $133.1M | +809,479 (+21.9%) | June 30, 2026 |
| 13 | Wellington Management Company LLP | 2.50% | 4.3M | $128.2M | +765,355 (+21.4%) | June 30, 2026 |
| 14 | Kynam Capital Management, LP | 2.11% | 3.7M | $108.3M | −370,234 (−9.2%) | June 30, 2026 |
| 15 | Lord, Abbett & Co LLC | 1.98% | 3.4M | $101.3M | +249,760 (+7.9%) | June 30, 2026 |
| 16 | Polar Capital Holdings PLC | 1.86% | 3.2M | $95.4M | +3.2M (0.0%) | June 30, 2026 |
| 17 | COMMODORE CAPITAL LP | 1.76% | 3.0M | $90.0M | +161,993 (+5.6%) | June 30, 2026 |
| 18 | Assenagon Asset Management SA | 1.66% | 2.9M | $85.1M | +2.6M (+875.3%) | June 30, 2026 |
| 19 | Amvescap Plc. | 1.50% | 2.6M | $77.0M | +179,512 (+7.4%) | June 30, 2026 |
| 20 | Woodline Partners LP | 1.50% | 2.6M | $76.8M | +1.1M (+72.4%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 25.0M shares and 3 cut 4.5M.
COGT top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.98% | 5.2M | $152.6M | −6,409 (−0.1%) | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.49% | 4.3M | $127.4M | −49,728 (−1.1%) | September 30, 2026 |
| 3 | State Street® SPDR® S&P® Biotech ETF | 2.26% | 3.9M | $115.9M | −74,750 (−1.9%) | September 30, 2026 |
| 4 | Vanguard Small Cap Index | 2.15% | 3.7M | $110.3M | +4,129 (+0.1%) | August 31, 2026 |
| 5 | Polar Capital Biotech S Inc | 1.90% | 3.3M | $97.3M | — | August 31, 2026 |
| 6 | Fidelity Small Cap Growth | 1.45% | 2.5M | $74.1M | — | July 31, 2026 |
| 7 | Vanguard MStar Small Cap Value Index | 1.37% | 2.4M | $70.0M | +1,778 (+0.1%) | August 31, 2026 |
| 8 | Fidelity OTC | 1.08% | 1.9M | $55.3M | — | August 31, 2026 |
| 9 | Fidelity Select Health Care | 1.07% | 1.9M | $54.6M | — | August 31, 2026 |
| 10 | Fidelity Advisor Biotechnology I | 1.06% | 1.8M | $54.2M | — | August 31, 2026 |
| 11 | Fidelity Small Cap Index | 1.05% | 1.8M | $53.8M | +14,987 (+0.8%) | July 31, 2026 |
| 12 | Lord Abbett Growth Leaders I | 1.00% | 1.7M | $51.1M | +461,038 (+36.3%) | July 31, 2026 |
| 13 | Fidelity Select Biotechnology | 0.92% | 1.6M | $47.4M | — | August 31, 2026 |
| 14 | Strategic Advisers Fidelity US TtlStk | 0.91% | 1.6M | $46.6M | — | August 31, 2026 |
| 15 | iShares Russell 2000 Growth ETF | 0.90% | 1.6M | $46.0M | −1,975 (−0.1%) | September 30, 2026 |
| 16 | Fidelity Stock Selector Small Cap | 0.78% | 1.4M | $40.1M | — | July 31, 2026 |
| 17 | Pictet-Biotech P USD | 0.77% | 1.3M | $39.5M | +161,415 (+13.7%) | June 30, 2026 |
| 18 | Fidelity Small Cap Growth K6 | 0.72% | 1.2M | $36.9M | — | July 31, 2026 |
| 19 | iShares Biotechnology ETF | 0.70% | 1.2M | $35.8M | −9,200 (−0.8%) | September 30, 2026 |
| 20 | BGF World Healthscience A2 | 0.69% | 1.2M | $35.4M | −273,787 (−18.6%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
COGT insider transactions
latest 5| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-22 | Fairmount Funds Management Llc | Sell | $36.40 | 3,500,000 | $127.4M |
| 2025-12-26 | Evan Kearns | Sell | $38.70 | 65,000 | $2.5M |
| 2025-12-26 | Jessica Sachs | Sell | $38.70 | 82,642 | $3.2M |
| 2025-12-26 | John Edward Robinson | Sell | $38.74 | 90,000 | $3.5M |
| 2025-07-10 | Fairmount Funds Management Llc | Buy | $9.00 | 2,777,777 | $25.0M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
COGT shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns COGT
Institutional investors own 115.2% of Cogent Biosciences's shares and insiders 0.42%. The largest holder is FMR Inc with 14.80% of the shares (25.7M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 3 reduced their stake in the latest filings. Short interest is 11.28% of the float, or 9.63 days of average trading volume. The share count rose 4,183.0% since 2015.
Related: COGT analyst forecast, COGT key metrics. See the COGT stock overview for the latest quote and news.
COGT ownership FAQ
Who owns the most Cogent Biosciences stock?
The largest shareholders of Cogent Biosciences are FMR Inc (14.80%), BlackRock Inc (10.00%), Vanguard Portfolio Management, LLC (4.65%), Vanguard Capital Management, LLC (4.27%), State Street Corp (4.01%).
What percentage of Cogent Biosciences is owned by institutions?
Institutions hold 115.2% of Cogent Biosciences's shares outstanding; insiders hold 0.42%.
Which funds own Cogent Biosciences?
The largest fund holders of Cogent Biosciences are Vanguard MStar Total Stk Mkt Idx Invest (2.98%), iShares Russell 2000 ETF (2.49%), State Street® SPDR® S&P® Biotech ETF (2.26%), Vanguard Small Cap Index (2.15%), Polar Capital Biotech S Inc (1.90%).
What is Cogent Biosciences's short interest?
19.5M shares of Cogent Biosciences were sold short, 11.28% of the float; at the average daily volume it would take 9.63 days to cover.
Are insiders buying or selling Cogent Biosciences?
Of the latest 5 reported insider transactions in Cogent Biosciences (since July 10, 2025), 1 were purchases and 4 were sales.
How many shares of Cogent Biosciences are outstanding?
Cogent Biosciences has 173.5M shares outstanding, of which 172.6M are in the public float.