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 ($1.2m this quarter). Holder counts are more reliable. Shares outstanding: 173.5m as of 2026-08-06, 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 ≈ $38.70. Options: 9 managers hold calls ($56.5m notional), 7 hold puts ($15.6m).
Trends to Q2 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 |
| Q2 2026 | 324 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q2 2026 | 197 | 129 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $20.7m | $7.8m | 0.38 |
| Q4 2025 | $23.8m | $18.6m | 0.78 |
| Q1 2026 | $36.3m | $27.0m | 0.75 |
| Q2 2026 | $56.5m | $15.6m | 0.28 |
Biggest buyers
| Polar Capital Holdings Plc | New | +3.2m |
| Assenagon Asset Management S.A. | Added | +2.6m |
| FMR LLC | Added | +2.6m |
| PRICE T ROWE ASSOCIATES INC /MD/ | Added | +1.4m |
| ORBIMED ADVISORS LLC | Added | +1.4m |
| BlackRock, Inc. | Added | +1.3m |
| STATE STREET CORP | Added | +1.3m |
| Woodline Partners LP | Added | +1.1m |
| Deep Track Capital, LP | Added | +1.0m |
| Logos Global Management LP | New | +900.0k |
Biggest sellers
| DEERFIELD MANAGEMENT COMPANY, L.P. | Reduced | -4.0m |
| RTW INVESTMENTS, LP | Reduced | -3.1m |
| Holocene Advisors, LP | Reduced | -2.2m |
| GOLDMAN SACHS GROUP INC | Reduced | -2.1m |
| Vestal Point Capital, LP | Sold out | -1.2m |
| Sofinnova Investments, Inc. | Reduced | -1.1m |
| D. E. Shaw & Co., Inc. | Reduced | -945.9k |
| MARSHALL WACE, LLP | Reduced | -894.0k |
| CITADEL ADVISORS LLC | Reduced | -865.2k |
| Point72 Asset Management, L.P. | Reduced | -666.6k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $23.1m597.4k shares |
| Caption Management, LLC | Added | $7.1m184.1k shares |
| GROUP ONE TRADING LLC | Added | $6.6m169.6k shares |
| JANE STREET GROUP, LLC | Reduced | $5.8m149.4k shares |
| CITADEL ADVISORS LLC | Added | $5.7m147.8k shares |
| Balyasny Asset Management L.P. | New | $3.9m100.0k shares |
| SIMPLEX TRADING, LLC | Added | $2.4m61.1k shares |
| DLD Asset Management, LP | New | $1.5m40.0k shares |
| HRT FINANCIAL LP | New | $387.0k10.0k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $7.5m193.1k shares |
| CITADEL ADVISORS LLC | Reduced | $2.9m75.2k shares |
| Caption Management, LLC | Unchanged | $1.9m50.0k shares |
| SIMPLEX TRADING, LLC | Reduced | $1.7m44.6k shares |
| JANE STREET GROUP, LLC | Reduced | $603.7k15.6k shares |
| GROUP ONE TRADING LLC | Reduced | $541.8k14.0k shares |
| WOLVERINE ASSET MANAGEMENT LLC | Unchanged | $418.0k10.8k 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 since 1 Apr 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 |
|---|---|---|---|---|---|
| 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 | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 1 | $1.7m | $1.7m |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-08-27 | Morris Arlene Director | Sold plan | $1.7m45.5k 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, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| FMR LLC 0.04% of their portfolio | 25.7m $993.9m | Added +2.6m |
| BlackRock, Inc. 0.01% of their portfolio | 17.4m $671.5m | Added +1.3m |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.01% of their portfolio | 8.1m $312.4m | Added +739.1k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 7.4m $286.9m | Added +517.4k |
| STATE STREET CORP 0.01% of their portfolio | 7.0m $269.5m | Added +1.3m |
| Jupiter Topco LLC 0.10% of their portfolio | 6.6m $256.4m | First filing |
| Fairmount Funds Management LLC 14.08% of their portfolio | 5.5m $213.0m | Unchanged |
| DEERFIELD MANAGEMENT COMPANY, L.P. 2.02% of their portfolio | 5.0m $193.7m | Reduced -4.0m |
| TCG Crossover Management, LLC 4.52% of their portfolio | 4.9m $187.9m | Reduced -92.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.02% of their portfolio | 4.7m $180.1m | Added +1.4m |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 4.5m $174.5m | Added +809.5k |
| WELLINGTON MANAGEMENT GROUP LLP 0.03% of their portfolio | 4.3m $168.1m | Added +765.4k |
| Kynam Capital Management, LP 7.84% of their portfolio | 3.7m $141.9m | Reduced -370.2k |
| LORD, ABBETT & CO. LLC 0.38% of their portfolio | 3.4m $132.8m | Added +249.8k |
| Polar Capital Holdings Plc 0.35% of their portfolio | 3.2m $125.1m | New |
| Commodore Capital LP 7.03% of their portfolio | 3.0m $118.0m | Added +162.0k |
| Assenagon Asset Management S.A. 0.07% of their portfolio | 2.9m $111.6m | Added +2.6m |
| Invesco Ltd. 0.01% of their portfolio | 2.6m $101.0m | Added +179.5k |
| Woodline Partners LP 0.31% of their portfolio | 2.6m $100.7m | Added +1.1m |
| Pictet Asset Management Holding SA 0.09% of their portfolio | 2.4m $92.6m | Added +594.7k |
| Octagon Capital Advisors LP 8.35% of their portfolio | 2.4m $90.9m | Unchanged |
| RTW INVESTMENTS, LP 0.76% of their portfolio | 2.3m $89.4m | Reduced -3.1m |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 2.3m $88.6m | Reduced -2.1m |
| Candriam S.C.A. 0.36% of their portfolio | 2.1m $80.7m | Added +572.1k |
| Deep Track Capital, LP 1.14% of their portfolio | 2.0m $77.4m | Added +1.0m |
| Siren, L.L.C. 1.46% of their portfolio | 1.9m $72.0m | Added +150.0k |
| ORBIMED ADVISORS LLC 1.23% of their portfolio | 1.7m $65.1m | Added +1.4m |
| Venrock Adviser, LLC 1.93% of their portfolio | 1.6m $63.6m | Reduced -357.8k |
| EMERALD ADVISERS, LLC 1.46% of their portfolio | 1.6m $62.0m | Added +15.2k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.6m $60.3m | Added +312.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 1.4m $56.1m | Added +207.0k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 1.4m $55.7m | Added +395.8k |
| AMERICAN CENTURY COMPANIES INC 0.02% of their portfolio | 1.4m $55.5m | Added +542.4k |
| SILVERARC CAPITAL MANAGEMENT, LLC 5.52% of their portfolio | 1.3m $49.6m | Reduced -33.5k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 1.2m $47.0m | Added +155.4k |
| Elmind Capital, LP 11.38% of their portfolio | 1.2m $45.3m | Unchanged |
| UBS Group AG 0.01% of their portfolio | 1.1m $43.4m | Added +830.8k |
| FRED ALGER MANAGEMENT, LLC 0.14% of their portfolio | 1.1m $41.5m | Reduced -166.9k |
| Sofinnova Investments, Inc. 2.14% of their portfolio | 1.0m $40.1m | Reduced -1.1m |
| EMERALD MUTUAL FUND ADVISERS TRUST 1.40% of their portfolio | 1.0m $39.9m | Added +2.5k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.01% of their portfolio | 1.0m $39.6m | Added +572.7k |
| RENAISSANCE TECHNOLOGIES LLC 0.05% of their portfolio | 996.2k $38.6m | Added +289.9k |
| Balyasny Asset Management L.P. 0.07% of their portfolio | 954.8k $37.0m | Added +98.2k |
| VOYA INVESTMENT MANAGEMENT LLC 0.03% of their portfolio | 952.8k $36.9m | Added +288.6k |
| MORGAN STANLEY 0.00% of their portfolio | 941.7k $36.4m | Added +299.0k |
| D. E. Shaw & Co., Inc. 0.02% of their portfolio | 922.5k $35.7m | Reduced -945.9k |
| MILLENNIUM MANAGEMENT LLC 0.02% of their portfolio | 907.7k $35.1m | Reduced -284.7k |
| Logos Global Management LP 1.50% of their portfolio | 900.0k $34.8m | New |
| Squadron Capital Management LLC 11.46% of their portfolio | 865.0k $33.5m | Added +77.5k |
| CITADEL ADVISORS LLC 0.02% of their portfolio | 849.7k $32.9m | Reduced -865.2k |
| Point72 Asset Management, L.P. 0.04% of their portfolio | 744.2k $28.8m | Reduced -666.6k |
| MARSHALL WACE, LLP 0.02% of their portfolio | 706.2k $27.3m | Reduced -894.0k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.50% of their portfolio | 692.8k $26.8m | Added +570.6k |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 673.7k $26.1m | Added +304.0k |
| Nuveen, LLC 0.01% of their portfolio | 657.7k $25.5m | Reduced -173.9k |
| J. Goldman & Co LP 0.87% of their portfolio | 638.0k $24.7m | Reduced -141.6k |
| First Turn Management, LLC 2.49% of their portfolio | 602.3k $23.3m | Reduced -345.1k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 572.7k $22.0m | Added +415.4k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 534.0k $20.7m | Added +161.2k |
| Rock Springs Capital Management LP 0.97% of their portfolio | 515.9k $20.0m | Reduced -108.2k |
| Fiera Capital Corp 0.07% of their portfolio | 511.8k $19.8m | Reduced -46.4k |
| Redmile Group, LLC 1.31% of their portfolio | 503.3k $19.5m | Reduced -184.7k |
| DIADEMA PARTNERS LP 6.75% of their portfolio | 493.7k $19.1m | Added +170.9k |
| Eversept Partners, LP 1.03% of their portfolio | 490.2k $19.0m | New |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 475.3k $18.4m | Added +100.4k |
| SPHERA FUNDS MANAGEMENT LTD. 2.54% of their portfolio | 459.3k $17.8m | Added +43.0k |
| Ensign Peak Advisors, Inc 0.03% of their portfolio | 457.3k $17.7m | Reduced -115.6k |
| Affinity Asset Advisors, LLC 0.85% of their portfolio | 450.0k $17.4m | Reduced -300.0k |
| TimesSquare Capital Management, LLC 0.25% of their portfolio | 447.7k $17.3m | Added +362.7k |
| Patient Square Capital LP 2.55% of their portfolio | 425.0k $16.4m | Reduced -171.0k |
| SEGALL BRYANT & HAMILL, LLC 0.19% of their portfolio | 421.2k $16.3m | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 418.3k $16.2m | Added +166.2k |
| Defilade Capital Management, L.P. 2.04% of their portfolio | 393.4k $15.2m | Added +40.9k |
| Aberdeen Group plc 0.02% of their portfolio | 393.2k $15.2m | Added +120.5k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.02% of their portfolio | 392.5k $15.2m | Added +38.2k |
| NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio | 384.3k $14.9m | Added +378.2k |
| Ikarian Capital, LLC 2.34% of their portfolio | 370.1k $14.3m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.24% of their portfolio | 353.8k $13.7m | Reduced -6.7k |
| SUPERSTRING CAPITAL MANAGEMENT LP 8.39% of their portfolio | 343.3k $13.3m | Added +118.1k |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 332.3k $12.9m | Reduced -10.7k |
| Burkehill Global Management, LP 0.45% of their portfolio | 325.0k $12.6m | Reduced -350.0k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 294.9k $11.4m | Added +105.1k |
| FEDERATED HERMES, INC. 0.02% of their portfolio | 283.0k $11.0m | Reduced -2.7k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 279.1k $10.8m | Added +208.6k |
| Alyeska Investment Group, L.P. 0.03% of their portfolio | 274.8k $10.6m | Added +24.8k |
| Atika Capital Management LLC 1.04% of their portfolio | 272.0k $10.5m | Reduced -21.2k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 266.6k $10.3m | Added +139.1k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 259.0k $10.3m | Reduced -3.8k |
| Parkman Healthcare Partners LLC 1.01% of their portfolio | 253.4k $9.8m | Added +153.2k |
| Evergreen Quality Fund GP, Ltd. 0.16% of their portfolio | 250.0k $9.7m | Unchanged |
| Swiss National Bank 0.00% of their portfolio | 246.4k $9.5m | Added +81.0k |
| NWI MANAGEMENT LP 0.60% of their portfolio | 241.7k $9.4m | Reduced -241.7k |
| Tidal Investments LLC 0.02% of their portfolio | 241.6k $9.3m | Added +10.0k |
| Tema ETFs LLC 0.30% of their portfolio | 241.6k $9.3m | First filing |
| Susquehanna Portfolio Strategies, LLC 0.14% of their portfolio | 229.8k $8.9m | Unchanged |
| F/m Investments LLC 0.45% of their portfolio | 228.7k $8.9m | Added +2.5k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 228.4k $8.8m | Added +121.8k |
| SEB Asset Management AB 0.03% of their portfolio | 228.1k $8.8m | Added +63.7k |
| PEREGRINE CAPITAL MANAGEMENT LLC 0.28% of their portfolio | 226.3k $8.8m | Added +24.4k |
| Boxer Capital Management, LLC 0.66% of their portfolio | 225.0k $8.7m | Unchanged |