Robert W. McMahon
CIK 1608730 · SVP & Chief Financial Officer · last filed 2026-06-05
"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.
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Disclosed Exposure
$26.63M
Companies
4
Total Filings
58
Lifetime Open-Market Net
$0
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 |
|---|---|---|---|---|---|---|---|
| OSUR | Director | 123,137 | $4.05 | $498.7K | $0 | 6 | 2026-06-05 |
| WST | SVP & Chief Financial Officer | 4,230 | $354.07 | $1.50M | $0 | 3 | 2026-03-03 |
| A | Sr. VP and CFO | 168,753 | $145.97 | $24.63M | $0 | 31 | 2025-05-27 |
| HOLOGIC INC (HOLX) Delisted | Chief Financial Officer | 112,244 | $76.01 | $8.53M | $0 | 15 | 2018-08-03 |
Recent Filings · Page 4 of 6
58 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 |
|---|---|---|---|---|---|
| 2021-11-23 | A | Tax (F) | −1,751 | -$287.7K | EDGAR |
| 2021-11-19 | A | Tax (F) | −678 | -$109.5K | EDGAR |
| 2021-11-18 | A | Mixed | +24,479 | $3.95M | EDGAR |
| 2021-11-16 | A | Tax (F) | −1,869 | -$300.7K | EDGAR |
| 2021-08-05 | A | Tax (F) | −2,327 | -$358.0K | EDGAR |
| 2020-11-23 | A | Tax (F) | −1,751 | -$190.3K | EDGAR |
| 2020-11-19 | A | Mixed | +32,945 | $3.62M | EDGAR |
| 2020-11-17 | A | Tax (F) | −1,427 | -$157.2K | EDGAR |
| 2020-08-05 | A | Tax (F) | −2,303 | -$228.2K | EDGAR |
| 2019-11-21 | A | Grant (A) | +14,122 | $1.12M | 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.