Quick Takeaways
- Atlas Venture Fund X, L.P. filed SCHEDULE 13D/A for DISC MEDICINE, INC. Common Stock, $0.0001 par value per share (IRON).
- Disclosed ownership: 3.1%.
- Date of event: 13 Aug 2025.
Atlas Venture Fund X, L.P. - 13 Aug 2025 SCHEDULE 13D/A Report for DISC MEDICINE, INC. Common Stock, $0.0001 par value per share (IRON)
- Filing Manager
- Atlas Venture Fund X, L.P.
- Reporting Manager
- Atlas Venture Fund X, L.P.
- Symbol
- IRON
- Shares outstanding
- 34,984,742 shares
- Disclosed Ownership
- 1,084,527 shares
- Ownership
- 3.1%
- Form type
- SCHEDULE 13D/A
- Filing time
- 15 Aug 2025, 19:16:36 UTC
- Date of event
- 13 Aug 2025
- Next filing
- 17 Dec 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"Atlas Venture Fund X, L.P. disclosed 3.1% ownership in DISC MEDICINE, INC. Common Stock, $0.0001 par value per share (IRON) on 13 Aug 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 15 Aug 2025, 19:16.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (12)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Atlas Venture Fund X, L.P. | 3.1% | 1,084,527 | 0 | 1,084,527 | /s/ Ommer Chohan | By: Atlas Venture Associates X, L.P., its general partner, By: Atlas Venture Associates X, LLC, its general partner, By Ommer Chohan, CFO | 0001628098 |
| ATLAS VENTURE ASSOCIATES X, L.P. | 3.1% | 1,084,527 | 0 | 1,084,527 | /s/ Ommer Chohan | By: Atlas Venture Associates X, LLC, its general partner, By Ommer Chohan, CFO | 0001742766 |
| Atlas Venture Associates X, LLC | 3.1% | 1,084,527 | 0 | 1,084,527 | /s/ Ommer Chohan | Ommer Chohan, CFO | 0001742765 |
| Atlas Venture Fund XII, L.P. | 0.1% | 51,000 | 0 | 51,000 | /s/ Ommer Chohan | By: Atlas Venture Associates XII, L.P., its general partner, By: Atlas Venture Associates XII, LLC, its general partner, By Ommer Chohan, CFO | 0001812049 |
| Atlas Venture Associates XII, L.P. | 0.1% | 51,000 | 0 | 51,000 | /s/ Ommer Chohan | By: Atlas Venture Associates XII, LLC, its general partner, By Ommer Chohan, CFO | 0001845875 |
| Atlas Venture Associates XII, LLC | 0.1% | 51,000 | 0 | 51,000 | /s/ Ommer Chohan | Ommer Chohan, CFO | 0001845871 |
| Atlas Venture Opportunity Fund I, L.P. | 1.7% | 592,908 | 0 | 592,908 | /s/ Ommer Chohan | By: Atlas Venture Associates Opportunity I, L.P., its GP, By: Atlas Venture Associates Opportunity I, LLC, its GP, By Ommer Chohan, CFO | 0001759241 |
| Atlas Venture Associates Opportunity I, L.P. | 1.7% | 592,908 | 0 | 592,908 | /s/ Ommer Chohan | By: Atlas Venture Associates Opportunity I, LLC, its GP, By Ommer Chohan, CFO | 0001780065 |
| Atlas Venture Associates Opportunity I, LLC | 1.7% | 592,908 | 0 | 592,908 | /s/ Ommer Chohan | Ommer Chohan, CFO | 0001780066 |
| Atlas Venture Opportunity Fund II, L.P. | 1.2% | 420,549 | 0 | 420,549 | /s/ Ommer Chohan | By: Atlas Venture Associates Opportunity II, L.P., its GP, By: Atlas Venture Associates Opportunity II, LLC, its GP, By Ommer Chohan, CFO | 0001885327 |
| Atlas Venture Associates Opportunity II, LP | 1.2% | 420,549 | 0 | 420,549 | /s/ Ommer Chohan | By: Atlas Venture Associates Opportunity II, LLC, its GP, By Ommer Chohan, CFO | 0001935814 |
| Atlas Venture Associates Opportunity II, LLC | 1.2% | 420,549 | 0 | 420,549 | /s/ Ommer Chohan | Ommer Chohan, CFO | 0001935810 |