Stephen D Milligan

CIK 1277246 · Chief Executive Officer · last filed 2026-05-26

Stephen D Milligan is a Chief Executive Officer who has filed 122 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for ADSK, was dated Aug 27, 2026. Across all open-market trades the lifetime net is −$56.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $134.2M across reported positions. 108 SEC filings were submitted jointly with WESTERN DIGITAL CORP. 5 Form 144 notices of planned sales are also on file; the latest, for ADSK on Aug 27, 2026, lists the filer as an affiliate and former director. 4 sales listed on those notices, worth $2.1M in all, have no matching Form 4.

"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

$134.20M

Companies

Total Filings

122

Lifetime Open-Market Net

-$56.25M

Charts

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

WDC price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest

OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address

5130 HACIENDA DRIVE
DUBLIN, CA 94568

Related Filers

WESTERN DIGITAL CORP — 108 joint filings, latest 2020-04-21

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 in each company: direct shares plus every indirect holder (trusts, LLCs, partnerships, family members) on the latest Form 4 that lists them. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
ROST	Director	22,888	$232.36	$5.32M	$0	12	2026-05-26
ADSK	Director	11,198	$264.04	$2.96M	$0	8	2025-06-20
WDC	Chief Executive Officer	427,100	$294.84	$125.93M	-$56.25M	97	2020-04-21

Holdings By Holder

Who holds the shares on record: the insider directly, and each trust, LLC, partnership or family member reported as an indirect holder on the latest Form 4 that lists them. Holder names come from the filing's footnotes. Rows under No longer reported appeared on earlier filings but not the latest one, usually because the holder was emptied or folded into another; they are not counted in the total.

Symbol	Holder	Shares	Share of Total	Reported
ADSK	Direct	304	2.7%	2025-06-20
	By Trust	10,894	97.3%	2025-06-20
	Total	11,198
WDC	Direct	357,789	83.8%	2020-01-09
	By Family Trust	69,311	16.2%	2020-01-09
	Total	427,100
	No longer reported
	by Trust 401(K)	0	—	last 2007-05-04

Recent Filings

122 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, so not all of them end in a sale. Under each notice: the role the filer ticked on it, and whether a sale followed (a Form 4 sale within 30 days, or a sale listed on a later notice).

Filed	Symbol	Action	Net Shares	Net $	Link
2026-08-27	ADSK	Notice (144) Affiliate, Former Director · Seller: MILLIGAN FAMILY TRUST · Planned Aug 27, 2026 No sale on file	−3,644	-$956.5K	EDGAR
2026-08-26	ADSK	Notice (144) Affiliate, Former Director · Seller: MILLIGAN FAMILY TRUST · Planned Aug 26, 2026 Sold: listed on the Aug 27, 2026 notice	−2,000	-$510.1K	EDGAR
2026-08-21	ADSK	Notice (144) Affiliate, Former Director · Seller: MILLIGAN FAMILY TRUST · Planned Aug 21, 2026 Sold: listed on the Aug 26, 2026 notice	−2,000	-$509.1K	EDGAR
2026-08-18	ADSK	Notice (144) Affiliate, Former Director · Seller: MILLIGAN FAMILY TRUST · Planned Aug 18, 2026 Sold: listed on the Aug 21, 2026 notice	−2,000	-$500.9K	EDGAR
2026-08-13	ADSK	Notice (144) Affiliate, Former Director · Seller: MILLIGAN FAMILY TRUST · Planned Aug 13, 2026 Sold: listed on the Aug 18, 2026 notice	−2,400	-$600.0K	EDGAR
2026-05-26	ROST	Grant (A)	+896	$0	EDGAR
2025-06-20	ADSK	Grant (A)	+1,150	$0	EDGAR
2025-05-23	ROST	Grant (A)	+1,179	$0	EDGAR
2024-07-17	ADSK	Grant (A)	+1,338	$0	EDGAR
2024-05-24	ROST	Grant (A)	+1,293	$0	EDGAR

Showing 1–10 of 122

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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, and an amended or cancelled notice is not listed. 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. Someone who is no longer an officer or director (or never was) files no Form 4, so for them a sale shows up only on a later notice, which lists the seller's sales from the 3 months before it. "No sale on file" means neither record shows one; a dash in Net $ means the value filed on the notice doesn't fit the stock's price (likely a typo).

Sales Reported Only on Form 144

4 sales · $2.12M

Each Form 144 lists the seller's sales of the company's stock in the 3 months before it. These are the sales on this filer's notices that no Form 4 on file shows, which is the usual case once someone is no longer an officer or director, or for an affiliate who never files Form 4s. Each sale is listed once, with the first notice that reported it.

Sold	Symbol	Shares	Proceeds	Avg Price	Listed On
2026-08-26	ADSK Seller: MILLIGAN FAMILY TRUST	2,000	$510.1K	$255.05	2026-08-27
2026-08-21	ADSK Seller: MILLIGAN FAMILY TRUST	2,000	$509.1K	$254.54	2026-08-26
2026-08-18	ADSK Seller: MILLIGAN FAMILY TRUST	2,000	$500.9K	$250.47	2026-08-21
2026-08-13	ADSK Seller: MILLIGAN FAMILY TRUST	2,400	$600.0K	$250.00	2026-08-18