Mayo A Shattuck III

CIK 1087426 · Chairman · last filed 2026-09-28

Mayo A Shattuck III is a Chairman who has filed 156 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing shows the insider sold $2.0M of HUT on Sep 28, 2026. Across all open-market trades the lifetime net is −$136.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $230.5M 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.

Disclosed Exposure

$230.50M

Companies

Total Filings

156

Lifetime Open-Market Net

-$136.84M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

Filer Profile

Reported Address

C/O GAP, INC.
2 FOLSOM ST.
SAN FRANCISCO, CA 94105

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
HUT	Director	89,408	$89.30	$7.98M	-$2.00M	7	2026-09-28
GAP	Director	200,118	$23.61	$4.72M	$0	1	2026-07-01
COF	Director	67,911	$195.91	$13.30M	-$5.26M	26	2026-05-12
GAP INC (GPS) Delisted	Director	179,339	$24.55	$4.40M	-$82.3K	35	2025-07-02
EXC	Director	270,016	$41.49	$11.20M	-$102.00M	55	2022-04-04
ALRM	Director	67,317	$54.68	$3.68M	-$945.9K	13	2020-09-30
CEG	Chairman, Pres. & CEO	632,881	$299.59	$189.61M	-$26.55M	17	2012-02-28

Recent Filings

156 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
2026-09-28	HUT	Sell (S)	−20,000	-$2.00M	EDGAR
2026-09-24	HUT	Notice (144)	−20,000	-$2.00M	EDGAR
2026-07-01	GAP	Mixed	+20,779	$0	EDGAR
2026-06-15	HUT	Mixed	+16,416	$0	EDGAR
2026-05-12	COF	Grant (A)	+1,294	$0	EDGAR
2025-08-08	HUT	Grant (A)	—	$0	EDGAR
2025-07-02	GAP INC (GPS) Delisted	Mixed	+23,203	$0	EDGAR
2025-06-23	HUT	Exer (M)	+19,602	$0	EDGAR
2025-05-20	COF	Grant (A)	+358	$0	EDGAR
2025-05-12	COF	Grant (A)	+1,241	$0	EDGAR

Showing 1–10 of 156

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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.