Margaret A Horn
CIK 1294192 · Chief Operating Officer · last filed 2026-06-17
"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.
Loading insider history…
Disclosed Exposure
$21.14M
Companies
4
Total Filings
72
Lifetime Open-Market Net
-$36.84M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| RVMDW | Chief Operating Officer | 218,622 | $8.84 | $1.93M | -$29.60M | 19 | 2026-06-17 |
| SANGAMO THERAPEUTICS, INC (SGMO) Delisted | Director | 82,650 | $0.18 | $14.7K | $0 | 4 | 2025-06-16 |
| RVMD | Chief Operating Officer | 104,460 | $183.86 | $19.21M | -$7.24M | 23 | 2023-10-25 |
| KOSAN BIOSCIENCES INC (KOSN) Delisted | SVP, General Counsel | — | — | — | $0 | 1 | 2007-01-04 |
Recent Filings · Page 4 of 8
72 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-03-15 | RVMD | Notice (144) | −2,404 | -$79.1K | EDGAR |
| 2024-03-13 | RVMDW | Mixed | — | -$708.8K | EDGAR |
| 2024-03-11 | RVMD | Notice (144) | −23,671 | -$763.4K | EDGAR |
| 2024-03-05 | RVMDW | Grant (A) | +41,000 | $0 | EDGAR |
| 2023-12-19 | RVMDW | Mixed | −2,993 | -$190.3K | EDGAR |
| 2023-12-15 | RVMD | Notice (144) | −5,000 | -$130.8K | EDGAR |
| 2023-12-14 | RVMD | Notice (144/A) | −2,908 | -$69.7K | EDGAR |
| 2023-12-14 | RVMD | Notice (144) | −2,908 | -$69.7K | EDGAR |
| 2023-12-08 | RVMDW | Mixed | — | -$104.5K | EDGAR |
| 2023-12-06 | RVMD | Notice (144) | −5,000 | -$117.6K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.