Key facts
- Venrock Healthcare Capital Partners III, L.P. filed SCHEDULE 13G/A for CytomX Therapeutics, Inc. Common Stock, $0.00001 par value per share (CTMX).
- Disclosed ownership: 9.4%.
- Date of event: 30 Sep 2025.
Venrock Healthcare Capital Partners III, L.P. - 30 Sep 2025 SCHEDULE 13G/A Report for CytomX Therapeutics, Inc. Common Stock, $0.00001 par value per share (CTMX)
- Filing Manager
- Venrock Healthcare Capital Partners III, L.P.
- Reporting Manager
- Venrock Healthcare Capital Partners III, L.P.
- Symbol
- CTMX
- Shares outstanding
- 165,547,872 shares
- Disclosed Ownership
- 15,561,500 shares
- Ownership
- 9.4%
- Form type
- SCHEDULE 13G/A
- Filing time
- 14 Nov 2025, 17:30:41 UTC
- Date of event
- 30 Sep 2025
- Previous filing
- 20 May 2025
- Next filing
- 15 May 2026
- SEC
- View on sec.gov
Key filing fact
Venrock Healthcare Capital Partners III, L.P. disclosed 9.4% ownership in CytomX Therapeutics, Inc. Common Stock, $0.00001 par value per share (CTMX) on 30 Sep 2025.
Change
- Previous schedule filing date: 20 May 2025.
- Current filing was accepted on 14 Nov 2025, 17:30.
Research use
- 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.
Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Reporting managers (7)
Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| Venrock Healthcare Capital Partners III, L.P. | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By VHCP Management III, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory | |
| VHCP Co-Investment Holdings III, LLC | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By VHCP Management III, LLC, its Manager, By Sherman G. Souther, Authorized Signatory | |
| Venrock Healthcare Capital Partners EG, L.P. | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By VHCP Management EG, LLC, its General Partner, By Sherman G. Souther, Authorized Signatory | |
| VHCP Management III, LLC | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By Sherman G. Souther, Authorized Signatory | |
| VHCP Management EG, LLC | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By Sherman G. Souther, Authorized Signatory | |
| Nimish Shah | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By Sherman G. Souther, Attorney-in-fact | |
| Bong Y. Koh | 9.4% | 15,561,500 | 0 | 15,561,500 | /s/ Sherman G. Souther | By Sherman G. Souther, Attorney-in-fact |
CIK / CUSIP context first