CTMX insider buying and SEC filings, explained
CytomX Therapeutics, Inc. · CIK 1501989
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$468K
Planned sales (10b5-1)
$1.7M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Nov 6, 2025 | Planned (10b5-1) Amended filing | Sean A. McCarthy (CEO and Director) sold 203,586 shares in 2 share classes at about $4.54 ($924K), marked as a 10b5-1 plan trade. Holdings of Class A Common Stock down 9% to 987,891 shares. This amends a filing from Nov 10, 2025. | SEC filing Filed Oct 16, 2026, 7:40 PM ET |
| Jun 15, 2026 | Sale | Christopher Ogden (CFO) sold 1,624 shares at $3.05 ($5K). Holdings down 1% to 295,324 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 17, 2026 |
| Mar 17, 2026 | Sale | Yu-Waye Chu (Chief Medical Officer) sold 21,279 shares at $6.42 ($137K). Holdings down 10% to 189,446 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Mar 17, 2026 | Planned (10b5-1) | Sean A. McCarthy (CEO and Director) sold 118,969 shares at $6.42 ($764K), marked as a 10b5-1 plan trade. Holdings down 10% to 1,078,922 shares. | SEC filing Filed Mar 19, 2026 |
| Mar 17, 2026 | Sale | Marcia Belvin (SVP, Chief Scientific Officer) sold 31,492 shares at $6.42 ($202K). Holdings down 9% to 300,760 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
| Mar 17, 2026 | Sale | Christopher Ogden (CFO) sold 19,323 shares at $6.42 ($124K). Holdings down 6% to 296,948 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 19, 2026 |
15 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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