COGENT BIOSCIENCES INC COGT
COM · Common Stock · CUSIP 19240Q201 · ISIN US19240Q2012
Company in Waltham, United States
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersWaltham, MA
- Founded2014
- Websitecogentbio.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($523.6k this quarter). Holder counts are more reliable. Shares outstanding: 170.9m as of 2026-05-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $38.48. Options: 8 managers hold calls ($36.3m notional), 8 hold puts ($27.0m).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 134 |
| Q4 2022 | 136 |
| Q1 2023 | 137 |
| Q2 2023 | 137 |
| Q3 2023 | 136 |
| Q4 2023 | 145 |
| Q1 2024 | 147 |
| Q2 2024 | 150 |
| Q3 2024 | 162 |
| Q4 2024 | 178 |
| Q1 2025 | 187 |
| Q2 2025 | 182 |
| Q3 2025 | 195 |
| Q4 2025 | 267 |
| Q1 2026 | 306 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 81 | 68 |
| Q3 2024 | 81 | 67 |
| Q4 2024 | 89 | 69 |
| Q1 2025 | 97 | 68 |
| Q2 2025 | 106 | 72 |
| Q3 2025 | 126 | 69 |
| Q4 2025 | 175 | 85 |
| Q1 2026 | 187 | 118 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $20.5m | $6.5m | 0.32 |
| Q3 2025 | $20.7m | $7.8m | 0.38 |
| Q4 2025 | $23.8m | $18.6m | 0.78 |
| Q1 2026 | $36.3m | $27.0m | 0.75 |
Biggest buyers
| BlackRock, Inc. | Added | +3.1m |
| GOLDMAN SACHS GROUP INC | Added | +2.7m |
| Invesco Ltd. | Added | +1.8m |
| Pictet Asset Management Holding SA | Added | +1.7m |
| JANUS HENDERSON GROUP PLC | Added | +1.4m |
| LORD, ABBETT & CO. LLC | Added | +1.3m |
| Vestal Point Capital, LP | New | +1.2m |
| Holocene Advisors, LP | Added | +1.1m |
| WELLINGTON MANAGEMENT GROUP LLP | Added | +866.3k |
| STATE STREET CORP | Added | +723.2k |
Biggest sellers
| Fairmount Funds Management LLC | Reduced | -3.5m |
| Duquesne Family Office LLC | Sold out | -2.2m |
| RTW INVESTMENTS, LP | Reduced | -2.1m |
| Kynam Capital Management, LP | Reduced | -2.1m |
| Vivo Capital, LLC | Reduced | -2.0m |
| TCG Crossover Management, LLC | Reduced | -921.3k |
| Redmile Group, LLC | Reduced | -749.9k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold out | -669.0k |
| Saturn V Capital Management LP | Reduced | -590.4k |
| Balyasny Asset Management L.P. | Reduced | -583.7k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $17.5m453.5k shares |
| JANE STREET GROUP, LLC | Added | $6.8m176.8k shares |
| CITADEL ADVISORS LLC | Added | $3.9m101.6k shares |
| J. Goldman & Co LP | New | $2.6m67.6k shares |
| Caption Management, LLC | Added | $1.9m50.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $1.8m46.4k shares |
| GROUP ONE TRADING LLC | Reduced | $1.2m30.2k shares |
| Tidal Investments LLC | New | $608.1k15.8k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $10.8m279.9k shares |
| SIMPLEX TRADING, LLC | Added | $5.8m150.7k shares |
| CITADEL ADVISORS LLC | Added | $3.5m90.9k shares |
| JANE STREET GROUP, LLC | Added | $2.1m54.3k shares |
| Caption Management, LLC | New | $1.9m50.0k shares |
| GROUP ONE TRADING LLC | Added | $1.5m38.9k shares |
| TUDOR INVESTMENT CORP ET AL | New | $1.0m27.2k shares |
| WOLVERINE ASSET MANAGEMENT LLC | New | $415.7k10.8k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| FMR LLC 13G · institution filed 2025-02-12 | 15.0% |
| Fairmount Funds Management LLC 13D · may seek influence -1.3 pts · filed 2026-03-31 | 8.6% |
| BlackRock, Inc. 13G · institution +1.5 pts · filed 2026-07-27 | 8.0% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-07-31 | 5.1% |
Fell to 5% or below in the last year: Flynn James E (2.9%, 2026-08-13), VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC), Commodore Capital LP (1.8%, 2026-02-17), Kynam Capital Management, LP (4.3%, 2026-02-17), TCG Crossover GP I, LLC (4.8%, 2025-11-14), Paradigm Biocapital Advisors LP (2.3%, 2025-11-14), Point72 Asset Management, L.P. (4.0%, 2025-11-14)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 1 | $332.5k | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 1 | $25.0m | 0 | — | — |
| Q4 2025 | 0 | — | 4 | $12.2m | — |
| Q1 2026 | 0 | — | 1 | $370.0m | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-03-31 | Fairmount Funds Management LLC Director · Fairmount Healthcare Fund II LP | Sold | $242.6m7.0m shares |
| 2026-01-22 | Fairmount Funds Management LLC Director · Fairmount Healthcare Fund II LP | Sold | $127.4m3.5m shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| FMR LLC 0.05% of their portfolio | 23.1m $890.0m | Added +35.8k |
| BlackRock, Inc. 0.01% of their portfolio | 16.0m $617.6m | Added +3.1m |
| DEERFIELD MANAGEMENT COMPANY, L.P. 4.11% of their portfolio | 9.0m $348.1m | Unchanged |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 7.3m $282.3m | First filing |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 6.9m $265.4m | First filing |
| JANUS HENDERSON GROUP PLC 0.11% of their portfolio | 6.0m $229.6m | Added +1.4m |
| STATE STREET CORP 0.01% of their portfolio | 5.7m $218.0m | Added +723.2k |
| Fairmount Funds Management LLC 15.30% of their portfolio | 5.5m $211.8m | Reduced -3.5m |
| RTW INVESTMENTS, LP 2.09% of their portfolio | 5.5m $210.1m | Reduced -2.1m |
| TCG Crossover Management, LLC 5.45% of their portfolio | 4.9m $190.4m | Reduced -921.3k |
| GOLDMAN SACHS GROUP INC 0.02% of their portfolio | 4.4m $170.7m | Added +2.7m |
| Kynam Capital Management, LP 9.86% of their portfolio | 4.0m $155.4m | Reduced -2.1m |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 3.7m $142.4m | Added +185.0k |
| WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio | 3.6m $137.7m | Added +866.3k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.01% of their portfolio | 3.2m $123.7m | Added +648.8k |
| LORD, ABBETT & CO. LLC 0.40% of their portfolio | 3.2m $122.4m | Added +1.3m |
| Commodore Capital LP 6.43% of their portfolio | 2.9m $111.2m | Added +691.2k |
| Invesco Ltd. 0.01% of their portfolio | 2.4m $93.5m | Added +1.8m |
| Octagon Capital Advisors LP 10.01% of their portfolio | 2.4m $90.5m | Unchanged |
| Holocene Advisors, LP 0.21% of their portfolio | 2.3m $86.6m | Added +1.1m |
| Sofinnova Investments, Inc. 4.08% of their portfolio | 2.1m $81.4m | Added +139.9k |
| Venrock Adviser, LLC 2.87% of their portfolio | 2.0m $77.0m | Unchanged |
| D. E. Shaw & Co., Inc. 0.06% of their portfolio | 1.9m $71.9m | Reduced -379.4k |
| Pictet Asset Management Holding SA 0.07% of their portfolio | 1.8m $68.8m | Added +1.7m |
| CITADEL ADVISORS LLC 0.05% of their portfolio | 1.7m $66.0m | Added +275.9k |
| Siren, L.L.C. 1.82% of their portfolio | 1.7m $65.8m | Added +80.0k |
| MARSHALL WACE, LLP 0.07% of their portfolio | 1.6m $61.6m | Reduced -60.6k |
| EMERALD ADVISERS, LLC 1.93% of their portfolio | 1.6m $61.1m | Added +4.8k |
| Candriam S.C.A. 0.30% of their portfolio | 1.5m $58.4m | Added +219.8k |
| Woodline Partners LP 0.22% of their portfolio | 1.5m $58.1m | Added +690.8k |
| Point72 Asset Management, L.P. 0.09% of their portfolio | 1.4m $54.3m | Added +583.3k |
| SILVERARC CAPITAL MANAGEMENT, LLC 5.96% of their portfolio | 1.3m $50.6m | Added +68.9k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.2m $47.9m | Added +46.5k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.2m $47.8m | Reduced -38.5k |
| FRED ALGER MANAGEMENT, LLC 0.21% of their portfolio | 1.2m $47.7m | Added +137.5k |
| Vestal Point Capital, LP 1.32% of their portfolio | 1.2m $47.4m | New |
| MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio | 1.2m $45.9m | Reduced -15.8k |
| Elmind Capital, LP 12.79% of their portfolio | 1.2m $45.1m | Unchanged |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 1.1m $40.7m | First filing |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.0m $40.2m | Reduced -148.1k |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.92% of their portfolio | 1.0m $39.6m | Reduced -9.7k |
| Deep Track Capital, LP 0.79% of their portfolio | 1.0m $38.5m | Added +546.9k |
| First Turn Management, LLC 4.07% of their portfolio | 947.3k $36.5m | Added +123.1k |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 890.6k $34.3m | Reduced -2.4k |
| Balyasny Asset Management L.P. 0.06% of their portfolio | 856.6k $33.0m | Reduced -583.7k |
| Nuveen, LLC 0.01% of their portfolio | 831.6k $32.0m | Reduced -101.0k |
| Squadron Capital Management LLC 12.13% of their portfolio | 787.5k $30.3m | Added +7.5k |
| J. Goldman & Co LP 1.39% of their portfolio | 779.6k $30.0m | Added +340.3k |
| Affinity Asset Advisors, LLC 1.69% of their portfolio | 750.0k $28.9m | Added +400.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio | 706.3k $27.2m | Added +17.2k |
| Redmile Group, LLC 1.75% of their portfolio | 688.0k $26.5m | Reduced -749.9k |
| Burkehill Global Management, LP 1.29% of their portfolio | 675.0k $26.0m | Added +350.0k |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 664.1k $25.6m | Added +530.9k |
| MORGAN STANLEY 0.00% of their portfolio | 642.7k $24.7m | Reduced -84.1k |
| Saturn V Capital Management LP 4.37% of their portfolio | 626.6k $24.1m | Reduced -590.4k |
| Rock Springs Capital Management LP 1.42% of their portfolio | 624.2k $24.0m | Reduced -224.9k |
| Patient Square Capital LP 4.07% of their portfolio | 596.0k $22.9m | Added +278.6k |
| Ensign Peak Advisors, Inc 0.04% of their portfolio | 572.9k $22.0m | Added +151.3k |
| Fiera Capital Corp 0.07% of their portfolio | 558.3k $21.5m | New |
| NWI MANAGEMENT LP 0.57% of their portfolio | 483.3k $18.6m | Unchanged |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 449.5k $17.3m | New |
| Vivo Capital, LLC 1.35% of their portfolio | 422.3k $16.3m | Reduced -2.0m |
| SPHERA FUNDS MANAGEMENT LTD. 2.76% of their portfolio | 416.3k $16.0m | Added +37.8k |
| Qube Research & Technologies Ltd 0.02% of their portfolio | 394.0k $15.2m | Added +117.3k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 374.9k $14.4m | Reduced -10.6k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 372.8k $14.3m | Reduced -3.5k |
| ExodusPoint Capital Management, LP 0.14% of their portfolio | 372.2k $14.3m | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 369.7k $14.2m | Reduced -6.2k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.29% of their portfolio | 360.5k $13.9m | Added +8.1k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.02% of their portfolio | 354.2k $13.6m | Added +48.3k |
| Defilade Capital Management, L.P. 1.91% of their portfolio | 352.6k $13.6m | Reduced -216.0k |
| Integral Health Asset Management, LLC 0.71% of their portfolio | 350.0k $13.5m | New |
| Weiss Asset Management LP 0.24% of their portfolio | 346.1k $13.3m | Not comparable |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 343.1k $13.2m | Added +144.1k |
| Longaeva Partners L.P. 0.62% of their portfolio | 335.0k $12.9m | New |
| Hennion & Walsh Asset Management, Inc. 0.42% of their portfolio | 326.5k $12.6m | Reduced -11.6k |
| DIADEMA PARTNERS LP 5.13% of their portfolio | 322.8k $12.4m | Added +190.9k |
| ORBIMED ADVISORS LLC 0.27% of their portfolio | 322.1k $12.4m | Reduced -48.9k |
| Assenagon Asset Management S.A. 0.02% of their portfolio | 295.6k $11.4m | Reduced -80.0k |
| SummitTX Capital, L.P. 0.36% of their portfolio | 293.8k $11.3m | Added +36.6k |
| Atika Capital Management LLC 1.78% of their portfolio | 293.2k $11.3m | Reduced -212.8k |
| UBS Group AG 0.00% of their portfolio | 291.5k $11.2m | Added +27.4k |
| FEDERATED HERMES, INC. 0.02% of their portfolio | 285.7k $11.0m | Reduced -141.1k |
| Exome Asset Management LLC 6.31% of their portfolio | 278.5k $10.7m | Reduced -27.0k |
| Aberdeen Group plc 0.02% of their portfolio | 272.7k $10.5m | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 262.7k $9.3m | Reduced -138.2k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 252.1k $9.7m | Added +63.8k |
| Alyeska Investment Group, L.P. 0.03% of their portfolio | 250.0k $9.6m | Reduced -243.9k |
| Nantahala Capital Management, LLC 0.60% of their portfolio | 250.0k $9.6m | Unchanged |
| Evergreen Quality Fund GP, Ltd. 0.22% of their portfolio | 250.0k $9.6m | Unchanged |
| Tidal Investments LLC 0.03% of their portfolio | 231.6k $8.9m | New |
| Susquehanna Portfolio Strategies, LLC 0.13% of their portfolio | 229.8k $8.8m | Unchanged |
| Squarepoint Ops LLC 0.02% of their portfolio | 226.3k $8.7m | Added +70.3k |
| F/m Investments LLC 0.58% of their portfolio | 226.1k $8.7m | Reduced -9.7k |
| SUPERSTRING CAPITAL MANAGEMENT LP 6.19% of their portfolio | 225.2k $8.7m | Reduced -141.1k |
| Boxer Capital Management, LLC 1.14% of their portfolio | 225.0k $8.7m | Unchanged |
| NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio | 223.2k $8.6m | Added +178.8k |
| Hudson Bay Capital Management LP 0.05% of their portfolio | 207.6k $8.0m | New |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.29% of their portfolio | 202.0k $7.8m | New |
| Cormorant Asset Management, LP 0.39% of their portfolio | 200.0k $7.7m | Reduced -25.0k |