Company · Ownership research

Seagate Technology Holdings plc STX

CIK 0001137789

Form 4 transactions dated Nov 1, 2023 to Nov 8, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 76 rows; the complete set is available through the API.

Insider filings on file run through Nov 3, 2026.

Insider purchases & sales

Purchased: $0.00
Sold: $755.29M

Nov 1, 2023 – Nov 3, 2026
Available records · partial months are marked ·

202610 of 30 preview events · 76 available in 2026

Date	Insider	Activity	Trade value (USD)	% of prior holding
Nov 2, 2026	MOSLEY WILLIAM D CEO · Director	Sale10b5-1 footnote	$4.19M 6,720 shares sold	1.90% sold Direct holding	▾
Nov 2, 2026	MOSLEY WILLIAM D CEO · Director	Sale	$14.02M 23,280 shares sold	6.19% sold Direct holding	▾
Oct 30, 2026	Morris John Christopher EVP & CTO	Sale10b5-1 footnote	$1.74M 2,675 shares sold	11.33% sold Direct holding	▾
Oct 23, 2026	Lee James CI EVP & CLO	Sale	$351.41K 547 shares sold	34.55% sold Direct holding	▾
Oct 1, 2026	MOSLEY WILLIAM D CEO · Director	Sale10b5-1 footnote	$10.29M 11,002 shares sold	2.95% sold Direct holding	▾
Oct 1, 2026	MOSLEY WILLIAM D CEO · Director	Sale	$17.38M 18,998 shares sold	4.85% sold Direct holding	▾
Sep 21, 2026	Morris John Christopher EVP & CTO	Sale	$8.21M 9,354 shares sold	29.19% sold Direct holding	▾
Sep 15, 2026	Romano Gianluca EVP & CFO	Sale	$38.60M 49,984 shares sold	41.40% sold Direct holding	▾
Sep 15, 2026	MOSLEY WILLIAM D CEO · Director	Sale	$75.58M 97,889 shares sold	20.57% sold Direct holding	▾
Sep 15, 2026	Teh Ban Seng EVP & Chief Commercial Officer	Sale10b5-1 footnote	$41.24M 52,730 shares sold	90.08% sold Direct holding	▾

Showing 30 / 76 record groups in 2026. The complete set is available through the API.

Seagate Technology Holdings plc · STX

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 30 of 76 purchase / sale groups and 30 of 231 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"STX","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Share totals are on today's split-adjusted basis. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.