COGT · Insider trading · 13F holders · Congress trades
Cogent Biosciences, Inc. (COGT)
Who is buying and selling COGT: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 50
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $1.7M
- Congress trades, 12 months
- 1
COGT at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 1 COGT insider filed 1 sale worth $1.7M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
- 50 13F filers hold COGT among their 50 largest positions, worth $2.0B combined, including James Flynn. The biggest bets by portfolio weight are Fairmount Funds Management LLC (14.1%), Squadron Capital Management LLC (11.5%) and Elmind Capital, LP (11.4%). In their latest 13Fs, 0 managers opened a new position and 12 added to one.
- Members of Congress have disclosed 1 COGT trade since 2022, 1 purchase and 0 sales in the past year; the latest was Chris Jacobs (R-NY), buying $1K–15K on Dec 12, 2022.
- COGT last closed at $31.96 on Oct 29, 2026.
COGT insider trading
Between Aug 1, 2026 and Oct 29, 2026, 1 COGT insider filed 1 sale worth $1.7M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | Morris Arlene | Director | Sale10b5-1 | 45,510 | $37.12 | $1.7M | SEC |
Who owns COGT? Hedge funds and superinvestors
50 13F filers hold COGT among their 50 largest positions, worth $2.0B combined, including James Flynn. The biggest bets by portfolio weight are Fairmount Funds Management LLC (14.1%), Squadron Capital Management LLC (11.5%) and Elmind Capital, LP (11.4%). In their latest 13Fs, 0 managers opened a new position and 12 added to one.
Superinvestors holding COGT: James Flynn 2.4%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Fairmount Funds Management LLCHedge fund | 14.1% | $213.0M | 5,503,418 | +0.0% shares | Q2 2026 |
| James FlynnHedge fund | 2.4% | $193.7M | 5,006,104 | -44.6% shares | Q2 2026 |
| TCG Crossover Management, LLCHedge fund | 4.5% | $187.9M | 4,854,436 | -1.9% shares | Q2 2026 |
| Kynam Capital Management, LPHedge fund | 7.8% | $141.9M | 3,667,097 | -9.2% shares | Q2 2026 |
| Commodore Capital LPHedge fund | 7.0% | $118.0M | 3,050,000 | +5.6% shares | Q2 2026 |
| Octagon Capital Advisors LPHedge fund | 8.3% | $90.9M | 2,350,000 | +0.0% shares | Q2 2026 |
| Rtw Investments, LPHedge fund | 0.8% | $89.4M | 2,309,021 | -57.7% shares | Q2 2026 |
| Deep Track Capital, LPHedge fund | 1.1% | $77.4M | 2,000,000 | +100.0% shares | Q2 2026 |
| Siren, L.L.C.Investment manager | 1.5% | $72.0M | 1,859,279 | +8.8% shares | Q2 2026 |
| Orbimed Advisors LLCHedge fund | 1.2% | $65.1M | 1,681,300 | — | Q2 2026 |
| Venrock Adviser, LLCHedge fund | 1.9% | $63.6M | 1,642,166 | -17.9% shares | Q2 2026 |
| Emerald Advisers, LLCInstitutional asset manager | 1.5% | $62.0M | 1,603,319 | +1.0% shares | Q2 2026 |
| Silverarc Capital Management, LLCHedge fund | 5.5% | $49.6M | 1,280,707 | -2.5% shares | Q2 2026 |
| Elmind Capital, LPHedge fund | 11.4% | $45.3M | 1,170,740 | +0.0% shares | Q2 2026 |
| Sofinnova Investments, Inc.Hedge fund | 2.1% | $40.1M | 1,035,148 | -51.0% shares | Q2 2026 |
| Emerald Mutual Fund Advisers TrustMutual fund manager | 1.4% | $39.9M | 1,031,378 | +0.2% shares | Q2 2026 |
| Logos Global Management LPHedge fund | 1.5% | $34.8M | 900,000 | — | Q2 2026 |
| Squadron Capital Management LLCHedge fund | 11.5% | $33.5M | 865,000 | +9.8% shares | Q2 2026 |
| Boothbay Fund Management, LLCHedge fund | 0.5% | $26.8M | 692,825 | — | Q2 2026 |
| J. Goldman & Co LPInvestment manager | 0.9% | $24.7M | 637,994 | -18.2% shares | Q2 2026 |
| First Turn Management, LLCInstitutional asset manager | 2.5% | $23.3M | 602,281 | -36.4% shares | Q2 2026 |
| Rock Springs Capital Management LPHedge fund | 1.0% | $20.0M | 515,917 | -17.3% shares | Q2 2026 |
| Redmile Group, LLCHedge fund | 1.3% | $19.5M | 503,321 | -26.8% shares | Q2 2026 |
| Diadema Partners LPHedge fund | 7.2% | $19.1M | 493,664 | +52.9% shares | Q2 2026 |
| Eversept Partners, LPHedge fund | 1.0% | $19.0M | 490,235 | — | Q2 2026 |
| Sphera Funds Management Ltd.Hedge fund | 2.5% | $17.8M | 459,340 | +10.3% shares | Q2 2026 |
| Affinity Asset Advisors, LLCHedge fund | 0.9% | $17.4M | 450,000 | -40.0% shares | Q2 2026 |
| Patient Square Capital LPHedge fund | 2.5% | $16.4M | 425,000 | -28.7% shares | Q2 2026 |
| Defilade Capital Management, L.P.Hedge fund | 2.0% | $15.2M | 393,441 | +11.6% shares | Q2 2026 |
| Ikarian Capital, LLCHedge fund | 2.3% | $14.3M | 370,084 | — | Q2 2026 |
The 30 largest of 50 positions, by value. Each manager counts with its latest 13F (Q2 2026: 49, Q1 2026: 1). Screen COGT in the grand portfolio →
COGT stock trades by members of Congress
Members of Congress have disclosed 1 COGT trade since 2022, 1 purchase and 0 sales in the past year; the latest was Chris Jacobs (R-NY), buying $1K–15K on Dec 12, 2022.
| Filed | Member | Trade | Amount | Traded | Since |
|---|---|---|---|---|---|
| Jan 20, 2023 | Chris JacobsR-NY · House | Buy | $1K–15K | Dec 12, 2022 | +158.8% |
Analysis mentioning COGT
Posts from the blog that cover Cogent Biosciences, Inc., newest first.
COGT questions and answers
Are insiders buying COGT stock?
Between Aug 1, 2026 and Oct 29, 2026, 1 COGT insider filed 1 sale worth $1.7M on SEC Form 4, and no open-market purchases; 1 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own COGT?
50 13F filers hold COGT among their 50 largest positions, worth $2.0B combined, including James Flynn. The biggest bets by portfolio weight are Fairmount Funds Management LLC (14.1%), Squadron Capital Management LLC (11.5%) and Elmind Capital, LP (11.4%). In their latest 13Fs, 0 managers opened a new position and 12 added to one.
Has Congress traded COGT?
Members of Congress have disclosed 1 COGT trade since 2022, 1 purchase and 0 sales in the past year; the latest was Chris Jacobs (R-NY), buying $1K–15K on Dec 12, 2022.
Who is the largest holder of COGT?
Among 13F filers, Fairmount Funds Management LLC reports the largest COGT position, $213.0M (5,503,418 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Fairmount Funds Management LLC's: 14.1% of its portfolio.
Cite or share this
Free to use with a link back. The data updates every filing day.