Atlas Venture Associates Opportunity II, LLC — SEC Form 4 filings
SEC reporting owner CIK 1935810. 6 Form 4 filings on record with FilingPulse; latest filed 2025-02-10.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2024-01-25 to 2025-02-10. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 2 legs across 2 filings — 77,857 shares, $2,079,992 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 29 legs across 4 filings — 1,505,161 shares, $42,512,530 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 7.
- Largest priced transaction: sale of 272,923 shares @ $24.38 ($6,653,863) in Dyne Therapeutics, Inc., filed 2024-02-28.
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 |
|---|---|---|---|---|---|
| Dyne Therapeutics, Inc. (DYN) | 10% owner | 3 | — | 26 legs · 1,355,161 sh · $32,365,030 | — |
| Disc Medicine, Inc. (IRON) | 10% owner | 1 | — | 3 legs · 150,000 sh · $10,147,500 | — |
| Sionna Therapeutics, Inc. (SION) | 10% owner | 1 | 1 leg · 60,000 sh · $1,080,000 | — | 7 |
| Korro Bio, Inc. (KRRO) | 10% owner | 1 | 1 leg · 17,857 sh · $999,992 | — | — |
Form 4 filings — Atlas Venture Associates Opportunity II, LLC
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2025-02-10 | 4 | Sionna Therapeutics, Inc. (SION) jointly with Atlas Venture Fund XI, L.P., Atlas Venture Associates XI, L.P., Atlas Venture Associates XI, LLC, Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Conversion (C): 2,886,293 · Conversion (C): 747,727 · Purchase (P): 60,000 @ $18 · Conversion (C): 1,051,051 (derivative) @ $0 · Conversion (C): 1,806,317 (derivative) @ $0 · Conversion (C): 1,298,332 (derivative) @ $0 · +2 more | EDGAR |
| 2024-04-23 | 4 | Korro Bio, Inc. (KRRO) jointly with Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Purchase (P): 17,857 @ $56 | EDGAR |
| 2024-03-05 | 4 | Dyne Therapeutics, Inc. (DYN) jointly with Atlas Venture Opportunity Fund I, L.P., Atlas Venture Associates Opportunity I, L.P., Atlas Venture Associates Opportunity I, LLC, Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Sale (S): 29,435 @ $30.05 · Sale (S): 17,099 @ $30.05 | EDGAR |
| 2024-02-28 | 4 | Dyne Therapeutics, Inc. (DYN) jointly with Atlas Venture Fund XI, L.P., Atlas Venture Associates XI, L.P., Atlas Venture Associates XI, LLC, Atlas Venture Opportunity Fund I, L.P., Atlas Venture Associates Opportunity I, L.P., Atlas Venture Associates Opportunity I, LLC, Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Sale (S): 136,312 @ $23.59 · Sale (S): 64,783 @ $23.98 · Sale (S): 20,205 @ $23.59 · Sale (S): 9,603 @ $23.98 · Sale (S): 11,736 @ $23.59 · Sale (S): 5,580 @ $23.98 · +12 more | EDGAR |
| 2024-02-23 | 4 | Dyne Therapeutics, Inc. (DYN) jointly with Atlas Venture Fund XI, L.P., Atlas Venture Associates XI, L.P., Atlas Venture Associates XI, LLC, Atlas Venture Opportunity Fund I, L.P., Atlas Venture Associates Opportunity I, L.P., Atlas Venture Associates Opportunity I, LLC, Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Sale (S): 149,337 @ $22.44 · Sale (S): 35,164 @ $23.14 · Sale (S): 119,360 @ $22.66 · Sale (S): 159,542 @ $22.70 · Sale (S): 23,648 @ $22.70 · Sale (S): 13,738 @ $22.70 | EDGAR |
| 2024-01-25 | 4 | Disc Medicine, Inc. (IRON) jointly with Atlas Venture Fund X, L.P., ATLAS VENTURE ASSOCIATES X, L.P., Atlas Venture Associates X, LLC, Atlas Venture Opportunity Fund I, L.P., Atlas Venture Associates Opportunity I, L.P., Atlas Venture Associates Opportunity I, LLC, Atlas Venture Opportunity Fund II, L.P., Atlas Venture Associates Opportunity II, LP | Sale (S): 47,500 @ $67.65 · Sale (S): 82,500 @ $67.65 · Sale (S): 20,000 @ $67.65 | 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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