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Mark Mason

CIK 1487290 · Chief Financial Officer · last filed 2026-06-12

Mark Mason is a Chief Financial Officer who has filed 52 SEC Form 4 insider transactions across 3 companies since 2010. The most recent filing, for MSFT, was dated Jun 12, 2026. Across all open-market trades the lifetime net is −$785.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $34.4M 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.

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Disclosed Exposure

$34.41M

Companies

3

Total Filings

52

Lifetime Open-Market Net

-$784.99M

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
MSFT Director 1,675 $481.63 $806.7K $0 11 2026-06-12
C Chief Financial Officer 234,137 $137.65 $32.23M -$6.42M 18 2026-02-24
PRI Director 4,456 $308.21 $1.37M -$778.57M 21 2019-03-18

Recent Filings

52 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
2026-06-12 MSFT Grant (A) — $0 EDGAR
2026-06-09 MSFT Grant (A) — $0 EDGAR
2026-02-24 C Mixed −3,627 -$416.0K EDGAR
2026-02-20 C Notice (144) −3,627 -$416.0K EDGAR
2026-02-13 C Grant (A) +52,367 $0 EDGAR
2026-02-03 MSFT Grant (A) +145 $0 EDGAR
2026-01-20 C Tax (F) −29,209 -$3.45M EDGAR
2025-12-05 MSFT Grant (A) +130 $0 EDGAR
2025-09-12 MSFT Grant (A) +125 $0 EDGAR
2025-06-11 MSFT Grant (A) +132 $0 EDGAR
Showing 1–10 of 52
Page 1 of 6
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.