McMahon Robert W.
Director · Officer · WST, OSUR, A
As of 2026-09-16, McMahon Robert W. has 25 Form 4 transactions on record across 3 companies — 16 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|
25 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-08-11 | WST | Withheld for tax | 2,764 | 7,021 | Form 4 |
| 2026-08-11 | WST | Withheld for tax | 346 | 3,429 | Form 4 |
| 2026-08-11 | WST | Option exercise | 6,355 | 2,119 | Form 4 |
| 2026-08-11 | WST | Option exercise | 794 | 2,383 | Form 4 |
| 2026-08-11 | WST | Option exercise | 6,355 | 9,784 | Form 4 |
| 2026-08-11 | WST | Option exercise | 794 | 3,775 | Form 4 |
| 2026-08-11 | WST | Option exercise | 6,355 | 9,784 | Form 4 |
| 2026-08-11 | WST | Option exercise | 794 | 3,775 | Form 4 |
| 2026-06-03 | OSUR | Award / grant | 46,106 | 123,137 | Form 4 |
| 2026-05-13 | OSUR | Withheld for tax | 22,888 | 77,031 | Form 4 |
| 2026-03-01 | WST | Award / grant | 3,082 | 3,082 | Form 4 |
| 2026-03-01 | WST | Award / grant | 7,337 | 7,337 | Form 4 |
| 2026-02-11 | WST | Withheld for tax | 1,250 | 2,980 | Form 4 |
| 2026-02-11 | WST | Option exercise | 4,231 | 8,462 | Form 4 |
| 2026-02-11 | WST | Option exercise | 4,231 | 4,231 | Form 4 |
| 2026-02-11 | WST | Option exercise | 4,231 | 4,231 | Form 4 |
| 2025-08-11 | WST | Award / grant | 7,647 | 7,647 | Form 4 |
| 2025-08-11 | WST | Award / grant | 7,137 | 7,137 | Form 4 |
| 2025-08-11 | WST | Award / grant | 3,168 | 3,168 | Form 4 |
| 2025-08-11 | WST | Award / grant | 12,670 | 12,670 | Form 4 |
| 2025-07-31 | OSUR | Withheld for tax | 7,317 | 99,919 | Form 4 |
| 2025-05-22 | A | Withheld for tax | 3,499 | 168,754 | Form 4 |
| 2025-05-14 | OSUR | Award / grant | 71,017 | 107,236 | Form 4 |
| 2025-05-13 | OSUR | Withheld for tax | 6,427 | 36,219 | Form 4 |
| 2025-03-05 | A | Award / grant | 5,385 | 172,191 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.