FHMLS X, L.L.C. — SEC Form 4 filings
SEC reporting owner CIK 1790811. 5 Form 4 filings on record with FilingPulse; latest filed 2025-09-30.
Transaction summary — filings shown
Covers all 5 filings on record, filed 2024-04-08 to 2025-09-30. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 3 legs across 3 filings — 1,300,516 shares, $22,128,313 total (shares × price as filed).
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 5.
- Largest priced transaction: purchase of 666,666 shares @ $18.00 ($11,999,988) in MBX Biosciences, Inc., filed 2025-09-30.
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 |
|---|---|---|---|---|---|
| MBX Biosciences, Inc. (MBX) | 10% owner | 2 | 2 legs · 1,291,666 sh · $21,999,988 | — | 3 |
| HilleVax, Inc. (HLVX) | 10% owner | 3 | 1 leg · 8,850 sh · $128,325 | — | 2 |
Form 4 filings — FHMLS X, L.L.C.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2025-09-30 | 4 | MBX Biosciences, Inc. (MBX) jointly with Heron Patrick J, FHMLS X, L.P., Topper James N, Frazier Life Sciences X, L.P. | Purchase (P): 666,666 @ $18 | EDGAR |
| 2025-09-17 | 4 | HilleVax, Inc. (HLVX) jointly with Frazier Life Sciences X, L.P., FHMLS X, L.P., Topper James N, Heron Patrick J | Code (U): 8,535,337 @ $1.95 · Code (U): 17,199 @ $1.95 | EDGAR |
| 2024-09-17 | 4 | MBX Biosciences, Inc. (MBX) jointly with Frazier Life Sciences X, L.P., FHMLS X, L.P., Topper James N | Conversion (C): 3,927,774 · Purchase (P): 625,000 @ $16 · Conversion (C): 18,922,852 (derivative) · Conversion (C): 28,297,265 (derivative) | EDGAR |
| 2024-05-31 | 4/A | HilleVax, Inc. (HLVX) jointly with Frazier Life Sciences X, L.P., FHMLS X, L.P., Topper James N, Heron Patrick J | Holdings only — no transactions reported | EDGAR |
| 2024-04-08 | 4 | HilleVax, Inc. (HLVX) jointly with Frazier Life Sciences X, L.P., FHMLS X, L.P., Topper James N, Heron Patrick J | Purchase (P): 8,850 @ $14.50 | 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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