What the executives and directors of Seagate Technology actually did with their own shares, decoded from their SEC Form 4 filings. Each figure says the stretch of time it covers.

The tape: three years of insider trades

Every marker sits at the price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the grey strip is the routine flow (grants, vestings, tax withholding and gifts) that a headline gets wrong by counting it as selling. The share count changed 1-for-2 on May 4, 2026, so prices and share counts reported before then are restated to today's basis here; otherwise the tape would show a step the shares never took.

The 158 routine events on the chart, as a list

Date	Insider	Shares
Nov 2, 2026	MOSLEY WILLIAM D	14K
Oct 30, 2026	Morris John Christopher	915
Oct 24, 2026	CANNON MICHAEL R	2,317
Oct 24, 2026	CLEMMER RICHARD L	1,960
Oct 24, 2026	Szlosek Thomas A	1,960
Oct 24, 2026	Adams Mark	1,960
Oct 24, 2026	Geldmacher Jay L	1,960
Oct 24, 2026	BHATT PRAT	1,960
Oct 24, 2026	Tilenius Stephanie	1,960
Oct 24, 2026	Haggart Dylan G.	1,960
Oct 24, 2026	Arumugavelu Shankar	1,960
Oct 24, 2026	Conyers Yolanda Lee	1,960
Oct 22, 2026	Lee James CI	1,237
Oct 1, 2026	MOSLEY WILLIAM D	14K
Sep 21, 2026	Morris John Christopher	915
Sep 14, 2026	MOSLEY WILLIAM D	177K
Sep 14, 2026	Romano Gianluca	90K
Sep 14, 2026	Teh Ban Seng	53K
Sep 14, 2026	Chong Kian Fatt	14K
Sep 14, 2026	Morris John Christopher	30K
Sep 11, 2026	MOSLEY WILLIAM D	8,549
Sep 11, 2026	Romano Gianluca	55K
Sep 11, 2026	Teh Ban Seng	2,252
Sep 11, 2026	Chong Kian Fatt	1,259
Sep 11, 2026	Morris John Christopher	2,073
Sep 1, 2026	MOSLEY WILLIAM D	14K
Aug 24, 2026	Lee James CI	4,032
Aug 20, 2026	MOSLEY WILLIAM D	34K
Aug 20, 2026	Romano Gianluca	17K
Aug 20, 2026	Lee James CI	8,920
Aug 20, 2026	Teh Ban Seng	18K
Aug 20, 2026	Chong Kian Fatt	6,846
Aug 20, 2026	Morris John Christopher	7,578
Aug 13, 2026	Teh Ban Seng	6,002
Aug 3, 2026	MOSLEY WILLIAM D	14K
Jul 22, 2026	Lee James CI	1,237
Jul 1, 2026	MOSLEY WILLIAM D	14K
Jun 11, 2026	MOSLEY WILLIAM D	8,549
Jun 11, 2026	Romano Gianluca	4,169
Jun 11, 2026	Teh Ban Seng	2,251
Jun 11, 2026	Chong Kian Fatt	1,259
Jun 11, 2026	Morris John Christopher	2,072
Jun 1, 2026	MOSLEY WILLIAM D	14K
May 20, 2026	MOSLEY WILLIAM D	14K
May 14, 2026	Teh Ban Seng	8,003
Apr 22, 2026	Lee James CI	889
Mar 11, 2026	MOSLEY WILLIAM D	6,410
Mar 11, 2026	Romano Gianluca	3,126
Mar 11, 2026	Teh Ban Seng	1,126
Mar 11, 2026	Chong Kian Fatt	630
Mar 11, 2026	Morris John Christopher	1,509
Feb 22, 2026	Romano Gianluca	19K
Feb 20, 2026	MOSLEY WILLIAM D	8,887
Feb 20, 2026	Teh Ban Seng	2,953
Feb 20, 2026	Chong Kian Fatt	2,214
Feb 20, 2026	Morris John Christopher	3,230
Jan 29, 2026	Teh Ban Seng	4,717
Jan 22, 2026	Lee James CI	901
Jan 12, 2026	Teh Ban Seng	706
Dec 11, 2025	MOSLEY WILLIAM D	6,436

The 60 most recent of 158.

Where the shares went, last 12 months

Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price. The share count changed 1-for-2 on May 4, 2026, so share counts reported before then are restated to today's basis here.

The chart, in numbers

Flow	Shares
From holdings	31K
Vested / exercised	759K
Withheld for tax	22K
Planned sales (10b5-1)	517K
Discretionary sales	251K

Skin in the game

Directly held shares as reported after each trade, indexed to 100 at the start of the window, up to five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades. The share count changed 1-for-2 on May 4, 2026, so share counts reported before then are restated to today's basis here.

The chart, in numbers

Insider	Start of the window	Latest reported	Indexed, start = 100
MOSLEY WILLIAM D	282K	347K	123.1

“Since trade” compares with the latest insider-implied price, not a market quote: these pages are built from filings alone. A role here is the one on that day's Form 4, so somebody promoted since appears under both titles. The share count changed 1-for-2 on May 4, 2026. This table prints prices and share counts as they were filed, on the basis of the day, while the charts above are on today's; “Since trade” puts the filed price on today's basis first, which is why it does not divide into the price beside it.

Filing hygiene

How to read this

A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.

Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.

Every number on this page comes from Forms 3, 4 and 5 filed with the SEC. The insider export runs on its own schedule, so it can be a few days behind the rest of the site; the date below says how far it goes. Browse the source filings on SEC EDGAR. Data through Nov 5, 2026