Marcia Belvin serves as Executive at CytomX Therapeutics, Inc., where they oversee executive responsibilities. Since joining the company, Marcia Belvin has executed 11 insider transactions totaling $42.9K, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 2, 2026 involved receiving (via award) 250,000 shares valued at $0.
Marcia Belvin currently holds 250,000 shares of CytomX Therapeutics, Inc. (CTMX), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Marcia Belvin has been a net seller of CTMX stock. They have purchased $0 and sold $42.9K worth of shares.
Marcia Belvin's most recent insider trade was on Feb 2, 2026, when they sold 250,000 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Aug 20, 2024 | CTMX | $5.1K | Sale | 4,181 | $1.23 | Discretionary |
| Aug 20, 2024 | CTMX | $0 | Option Exercise | 11,250 | $N/A | Discretionary |
| Mar 19, 2024 | CTMX | $26.7K | Sale | 12,795 | $2.09 | Discretionary |
| Jan 18, 2024 | CTMX | $0 | Award | 26,250 | $N/A | Discretionary |
| Dec 20, 2023 | CTMX | $5.6K | Sale | 4,077 | $1.38 | Discretionary |
| Dec 17, 2023 | CTMX | $0 | Option Exercise | 11,250 | $N/A | Discretionary |
| Sep 22, 2023 | CTMX | $5.4K | Sale | 4,119 | $1.30 | Discretionary |
| Sep 20, 2023 | CTMX | $0 | Award | 11,250 | $N/A | Discretionary |
| Mar 22, 2023 | CTMX | $0 | Award | 60,000 | $N/A | Discretionary |