Margaret A Horn
CIK 1294192 · Chief Operating Officer · last filed 2026-03-19
Margaret A Horn is a Chief Operating Officer who has filed 45 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing shows the insider sold $455.9K of RVMDW on Mar 19, 2026. Across all open-market trades the lifetime net is −$20.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.0M 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.
$17.01M
4
45
-$20.39M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RVMDW | Chief Operating Officer | 157,570 | $5.94 | $936.0K | -$13.15M | 17 | 2026-03-19 |
| SANGAMO THERAPEUTICS, INC (SGMO) Delisted | Director | 82,650 | $0.18 | $14.7K | $0 | 4 | 2025-06-16 |
| RVMD | Chief Operating Officer | 104,460 | $153.87 | $16.07M | -$7.24M | 23 | 2023-10-25 |
| KOSAN BIOSCIENCES INC (KOSN) Delisted | SVP, General Counsel | — | — | — | $0 | 1 | 2007-01-04 |
Recent Filings
45 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-19 | RVMDW | Sell (S) | −4,583 | -$455.9K | EDGAR |
| 2026-03-03 | RVMDW | Grant (A) | +21,100 | $0 | EDGAR |
| 2026-01-09 | RVMDW | Mixed | — | -$4.66M | EDGAR |
| 2025-12-18 | RVMDW | Sell (S) | −4,847 | -$372.3K | EDGAR |
| 2025-09-18 | RVMDW | Sell (S) | −4,775 | -$218.8K | EDGAR |
| 2025-06-18 | RVMDW | Sell (S) | −3,510 | -$139.8K | EDGAR |
| 2025-06-16 | SANGAMO THERAPEUTICS, INC (SGMO) Delisted | Grant (A) | +25,000 | $0 | EDGAR |
| 2025-03-19 | RVMDW | Sell (S) | −3,058 | -$119.4K | EDGAR |
| 2025-03-04 | RVMDW | Grant (A) | +28,600 | $0 | EDGAR |
| 2024-12-18 | RVMDW | Sell (S) | −4,329 | -$196.6K | EDGAR |