MARCIA BELVIN
CIK 1970752 · SVP, Chief Scientific Officer · last filed 2026-03-19
MARCIA BELVIN is a SVP, Chief Scientific Officer who has filed 14 SEC Form 4 insider transactions across 1 company since 2023. The most recent filing shows the insider sold $202.3K of CTMX on Mar 19, 2026. Across all open-market trades the lifetime net is −$294.1K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $905.3K across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$905.3K
1
14
-$294.1K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| CTMX | SVP, Chief Scientific Officer | 300,760 | $3.01 | $905.3K | -$294.1K | 14 | 2026-03-19 |
Recent Filings
14 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-19 | CTMX | Sell (S) | −31,492 | -$202.3K | EDGAR |
| 2026-02-04 | CTMX | Grant (A) | +60,000 | $0 | EDGAR |
| 2025-09-30 | CTMX | Grant (A) | — | $0 | EDGAR |
| 2025-06-17 | CTMX | Mixed | +23,616 | -$37.3K | EDGAR |
| 2025-03-20 | CTMX | Sell (S) | −19,512 | -$11.7K | EDGAR |
| 2025-02-10 | CTMX | Grant (A) | +92,500 | $0 | EDGAR |
| 2025-02-06 | CTMX | Grant (A) | +87,500 | $0 | EDGAR |
| 2024-08-22 | CTMX | Mixed | +7,069 | -$5.1K | EDGAR |
| 2024-03-21 | CTMX | Sell (S) | −12,795 | -$26.7K | EDGAR |
| 2024-01-19 | CTMX | Grant (A) | +26,250 | $0 | EDGAR |