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Robert W. McMahon

CIK 1608730 · SVP & Chief Financial Officer · last filed 2026-08-12

Robert W. McMahon is a SVP & Chief Financial Officer who has filed 59 SEC Form 4 insider transactions across 4 companies since 2014. The most recent filing, for WST, was dated Aug 12, 2026. Current disclosed insider exposure totals $29.7M across reported positions. 35 SEC filings were submitted jointly with AGILENT TECHNOLOGIES INC.

"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

$29.68M

Companies

4

Total Filings

59

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
C/O AGILENT TECHNOLOGIES, INC.
5301 STEVENS CREEK BLVD.
SANTA CLARA, CA 95051
Related Filers
AGILENT TECHNOLOGIES INC — 35 joint filings, latest 2025-09-09
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
WST SVP & Chief Financial Officer 3,429 $375.87 $1.29M $0 4 2026-08-12
OSUR Director 123,137 $3.99 $491.3K $0 6 2026-06-05
A Sr. VP and CFO 168,753 $165.32 $27.90M $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

59 filings
Insider 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
2026-08-12 WST Mixed +4,040 -$1.09M EDGAR
2026-06-05 OSUR Grant (A) +46,106 $0 EDGAR
2026-05-14 OSUR Tax (F) −22,888 -$69.1K EDGAR
2026-03-03 WST Grant (A) — $0 EDGAR
2026-02-12 WST Mixed +2,980 -$307.7K EDGAR
2025-09-09 A Notice (144) −5,781 -$729.6K EDGAR
2025-09-04 A Notice (144) −15,303 -$1.97M EDGAR
2025-08-29 A Notice (144) −28,081 -$3.51M EDGAR
2025-08-12 WST Grant (A) — $0 EDGAR
2025-08-04 OSUR Tax (F) −7,317 -$23.5K EDGAR
Showing 1–10 of 59
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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.