MLYS · Insider trading · 13F holders · Congress trades
Mineralys Therapeutics, Inc. (MLYS)
Who is buying and selling MLYS: 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
- 35
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $5.5M
- Congress trades, 12 months
- 0
MLYS at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 5 MLYS insiders filed 6 sales worth $5.5M on SEC Form 4, and no open-market purchases; 5 of the sales were pre-planned under Rule 10b5-1.
- 35 13F filers hold MLYS among their 50 largest positions, worth $1.1B combined, including Peter Kolchinsky and James Flynn. The biggest bets by portfolio weight are Troluce Capital Advisors LLC (17.5%), Samsara Biocapital, LLC (13.0%) and Sphera Funds Management Ltd. (5.7%). In their latest 13Fs, 2 managers opened a new position and 11 added to one.
- No member of Congress has disclosed a trade in MLYS.
- MLYS last closed at $21.24 on Oct 29, 2026.
MLYS insider trading
Between Aug 1, 2026 and Oct 29, 2026, 5 MLYS insiders filed 6 sales worth $5.5M on SEC Form 4, and no open-market purchases; 5 of the sales were pre-planned under Rule 10b5-1.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | Congleton Jon | Chief Executive Officer, Director | Sale10b5-1 | 75,000 | $25.46 | $1.9M | SEC |
| Sep 24, 2026 | Slingsby Brian Taylor | Director | Sale | 104,320 | $28.81 | $3.0M | SEC |
| Sep 22, 2026 | Warren Eric | Chief Commercial Officer | Sale10b5-1 | 7,438 | $28.12 | $209K | SEC |
| Sep 17, 2026 | Karydas Daphne | Director | Sale10b5-1 | 3,000 | $28.58 | $86K | SEC |
| Aug 25, 2026 | Warren Eric | Chief Commercial Officer | Sale10b5-1 | 7,437 | $25.98 | $193K | SEC |
| Aug 12, 2026 | Rodman David Malcom | Chief Medical Officer | Sale10b5-1 | 2,170 | $27.09 | $59K | SEC |
Who owns MLYS? Hedge funds and superinvestors
35 13F filers hold MLYS among their 50 largest positions, worth $1.1B combined, including Peter Kolchinsky and James Flynn. The biggest bets by portfolio weight are Troluce Capital Advisors LLC (17.5%), Samsara Biocapital, LLC (13.0%) and Sphera Funds Management Ltd. (5.7%). In their latest 13Fs, 2 managers opened a new position and 11 added to one.
Superinvestors holding MLYS: Peter Kolchinsky 1.8% · James Flynn 1.3%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Peter KolchinskyHedge fund | 1.8% | $207.6M | 7,692,750 | +0.0% shares | Q2 2026 |
| Samsara Biocapital, LLCHedge fund | 13.0% | $158.4M | 5,871,018 | +0.0% shares | Q2 2026 |
| James FlynnHedge fund | 1.3% | $106.8M | 3,958,000 | — | Q2 2026 |
| Laurion Capital Management LPHedge fund | 5.1% | $67.6M | 2,506,152 | +12.3% shares | Q2 2026 |
| Orbimed Advisors LLCHedge fund | 1.1% | $56.9M | 2,110,300 | +2.8% shares | Q2 2026 |
| Armistice Capital, LLCHedge fund | 1.3% | $46.8M | 1,736,000 | +47.6% shares | Q2 2026 |
| Troluce Capital Advisors LLCHedge fund | 17.5% | $46.6M | 1,728,753 | +163.9% shares | Q2 2026 |
| SR One Capital Management, LPHedge fund | 4.1% | $42.2M | 1,563,966 | +0.0% shares | Q2 2026 |
| Andera PartnersHedge fund | 22.8% | $40.0M | 1,591,917 | +0.0% shares | Q3 2026 |
| Sphera Funds Management Ltd.Hedge fund | 5.7% | $39.7M | 1,469,971 | +9.7% shares | Q2 2026 |
| Ghisallo Capital Management LLCHedge fund | 0.7% | $30.4M | 1,125,000 | — | Q2 2026 |
| Logos Global Management LPHedge fund | 1.2% | $28.3M | 1,050,000 | — | Q2 2026 |
| Davern Capital Partners, LPInstitutional asset manager | 4.0% | $23.2M | 858,753 | +92.0% shares | Q2 2026 |
| Nantahala Capital Management, LLCHedge fund | 1.4% | $22.1M | 820,481 | -8.4% shares | Q2 2026 |
| Affinity Asset Advisors, LLCHedge fund | 1.0% | $20.2M | 750,000 | +0.0% shares | Q2 2026 |
| Catalio Capital Management, LPHedge fund | 3.3% | $17.5M | 648,722 | +47.8% shares | Q2 2026 |
| Pale Fire Capital SEAsset manager | 1.2% | $16.6M | 614,284 | +68.0% shares | Q2 2026 |
| Stempoint Capital LPHedge fund | 2.8% | $16.3M | 602,686 | +13.0% shares | Q2 2026 |
| Rock Springs Capital Management LPHedge fund | 0.6% | $13.1M | 484,951 | +10.3% shares | Q2 2026 |
| Prosight Management, LPHedge fund | 2.1% | $12.1M | 449,795 | New | Q2 2026 |
| Rhenman & Partners Asset Management ABHedge fund | 1.1% | $11.2M | 416,371 | +58.3% shares | Q2 2026 |
| Caption Management, LLCHedge fund | 0.4% | $11.1M | 413,087 | — | Q2 2026 |
| Parkman Healthcare Partners LLCHedge fund | 1.1% | $10.3M | 380,354 | +0.1% shares | Q2 2026 |
| CenterBook Partners LPHedge fund | 0.5% | $9.9M | 365,630 | — | Q2 2026 |
| Artia Global Partners LPHedge fund | 0.7% | $3.7M | 137,800 | +0.0% shares | Q2 2026 |
| 22nw, LPHedge fund | 2.9% | $3.1M | 113,840 | -74.4% shares | Q2 2026 |
| Ishara Investments LPHedge fund | 2.0% | $2.8M | 102,500 | +25.0% shares | Q2 2026 |
| Mark Asset Management LPHedge fund | 0.3% | $2.7M | 101,289 | -30.1% shares | Q2 2026 |
| Timothy G. Youngquist 2020 Irrevocable TrustInvestment manager | 0.5% | $2.5M | 100,869 | +0.0% shares | Q3 2026 |
| HighVista Strategies LLCHedge fund | 0.5% | $2.3M | 86,085 | — | Q2 2026 |
The 30 largest of 35 positions, by value. Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 33). Screen MLYS in the grand portfolio →
MLYS stock trades by members of Congress
No member of Congress has disclosed a trade in MLYS.
MLYS questions and answers
Are insiders buying MLYS stock?
Between Aug 1, 2026 and Oct 29, 2026, 5 MLYS insiders filed 6 sales worth $5.5M on SEC Form 4, and no open-market purchases; 5 of the sales were pre-planned under Rule 10b5-1.
Which hedge funds own MLYS?
35 13F filers hold MLYS among their 50 largest positions, worth $1.1B combined, including Peter Kolchinsky and James Flynn. The biggest bets by portfolio weight are Troluce Capital Advisors LLC (17.5%), Samsara Biocapital, LLC (13.0%) and Sphera Funds Management Ltd. (5.7%). In their latest 13Fs, 2 managers opened a new position and 11 added to one.
Has Congress traded MLYS?
No member of Congress has disclosed a trade in MLYS.
Who is the largest holder of MLYS?
Among 13F filers, Peter Kolchinsky reports the largest MLYS position, $207.6M (7,692,750 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Troluce Capital Advisors LLC's: 17.5% of its portfolio.
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