Bain Capital Life Sciences III General Partner, LLC — SEC Form 4 filings
SEC reporting owner CIK 1952106. 5 Form 4 filings on record with FilingPulse; latest filed 2026-04-30.
Transaction summary — filings shown
Covers all 5 filings on record, filed 2024-02-14 to 2026-04-30. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 1 leg across 1 filing — 450,000 shares, $9,900,000 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 5 legs across 2 filings — 4,000,000 shares, $114,998,336 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 7.
- Largest priced transaction: sale of 2,000,000 shares @ $28.05 ($56,100,000) in Heartflow, Inc., filed 2026-02-06.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Heartflow, Inc. (HTFL) | 10% owner | 3 | — | 5 legs · 4,000,000 sh · $114,998,336 | 4 |
| Kyverna Therapeutics, Inc. (KYTX) | 10% owner | 1 | 1 leg · 450,000 sh · $9,900,000 | — | 2 |
| NewAmsterdam Pharma Co N.V. (NAMS) | 10% owner | 1 | — | — | 1 |
Form 4 filings — Bain Capital Life Sciences III General Partner, LLC
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-04-30 | 4 | Heartflow, Inc. (HTFL) jointly with Bain Capital Life Sciences Investors, LLC, Bain Capital Life Sciences Fund III, L.P., BCLS Fund III Investments GP, LLC, BCLS Fund III Investments, LP | Sale (S): 254,110 @ $30.51 · Sale (S): 797,133 @ $29.37 · Sale (S): 892,533 @ $29.18 · Sale (S): 56,224 @ $30.05 | EDGAR |
| 2026-02-06 | 4 | Heartflow, Inc. (HTFL) jointly with Bain Capital Life Sciences Investors, LLC, Bain Capital Life Sciences Fund III, L.P., BCLS Fund III Investments GP, LLC, BCLS Fund III Investments, LP | Sale (S): 2,000,000 @ $28.05 | EDGAR |
| 2025-08-13 | 4 | Heartflow, Inc. (HTFL) jointly with Bain Capital Life Sciences Investors, LLC, Bain Capital Life Sciences Fund III, L.P., BCLS Fund III Investments GP, LLC, BCLS Fund III Investments, LP | Conversion (C): 12,014,234 · Conversion (C): 433,924 @ $15.20 · Conversion (C): 35,081,564 (derivative) @ $0 · Conversion (C) @ $0 | EDGAR |
| 2024-12-17 | 4 | NewAmsterdam Pharma Co N.V. (NAMS) jointly with Bain Capital Life Sciences Investors, LLC, BCLS Fund III Investments, LP, Bain Capital Life Sciences Fund III, L.P., BCLS Fund III Investments GP, LLC, BCLS II Investco, LP, BCLS II Investco (GP), LLC, Bain Capital Life Sciences Fund II, L.P., Bain Capital Life Sciences Investors II, LLC, BCIP Life Sciences Associates, LP | Purchase (P): 1,632,653 (derivative) @ $24.50 | EDGAR |
| 2024-02-14 | 4 | Kyverna Therapeutics, Inc. (KYTX) jointly with Bain Capital Life Sciences Investors, LLC, Bain Capital Life Sciences Fund III, L.P., Bain Capital Life Sciences Opportunities III GP, LLC, Bain Capital Life Sciences Opportunities III, LP | Conversion (C): 2,713,868 · Purchase (P): 450,000 @ $22 · Conversion (C): 12,351,087 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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