Seagate Technology Holdings plc (STX) - Insider Holders & Insider Ownership

List of insiders holdings for Seagate Technology Holdings plc:

Shares directly owned by the insider.
Shares indirectly owned by the insider.
Total shares owned by the insider (sum of shares directly and indirectly owned).
Total market value if available.
Shares are not adjusted for stock split.

"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#	Insider Holder Name	Report Date Time	Shares Owned Directly Indirectly	Total Shares Owned	Filing
1	NEW SAC Former 10 % Shareholder	2006-02-14 14:52:55	71,583,997 0	71,583,997	Form 13G
2	SAMSUNG ELECTRONICS CO LTD 10% Owner	2013-10-22 12:52:07	32,700,000 0	32,700,000	Form 13D
3	HUTCHINS GLENN H Director	2006-08-17 17:02:13	0 23,061,080	23,061,080	Form 4
4	TPG SAC ADVISORS III CORP 10% Owner	2005-08-04 18:05:21	0 22,089,816	22,089,816	Form 4
5	SILVER LAKE OFFSHORE AIV GP LTD SILVER LAKE TECHNOLOGY INVESTORS CAYMAN LP SILVER LAKE INVESTORS CAYMAN LP SILVER LAKE PARTNERS CAYMAN LP 10% Owner	2007-02-14 06:23:22	10,680,538 0	10,680,538	Form 13G
6	RAPPAPORT ANDREW 10% Owner	2006-08-16 17:37:21	340,748 8,403,237	8,743,985	Form 5/A
7	ValueAct Holdings L.P. ValueAct Capital Master Fund L.P. ValueAct Capital Master Fund B L.P. VA Partners I LLC ValueAct Capital Management L.P. ValueAct Capital Management LLC ValueAct Holdings II L.P. ValueAct Holdings GP LLC See Remarks	2023-09-08 16:42:28	7,687,070 0	7,687,070	Form 13D
8	Haggart Dylan G. ValueAct Holdings L.P. ValueAct Capital Master Fund L.P. VA Partners I LLC ValueAct Capital Management L.P. ValueAct Capital Management LLC ValueAct Holdings II L.P. ValueAct Holdings GP LLC See Remarks	2023-09-08 16:42:28	7,687,070 0	7,687,070	Form 13D
9	WATKINS WILLIAM D CEO - See Remarks	2009-02-06 19:52:10	807,330 1,745,050	2,552,380	Form 4
10	AUGUST CAPITAL MANAGEMENT III LLC AUGUST CAPITAL III LP AUGUST CAPITAL STRATEGIC PARTNERS III LP MARQUARDT DAVID F RAPPAPORT ANDREW JOHNSTON JOHN R AUGUST CAPITAL III FOUNDERS FUND LP 10% Owner	2006-01-05 19:14:42	1,676,933 0	1,676,933	Form 4
11	MARQUARDT DAVID F Director	2009-12-02 13:48:43	1,196,652 106,388	1,303,040	Form 4
12	KRYDER MARK H SVP, CTO, Research	2007-05-03 16:41:01	1,076,124 1,825	1,077,949	Form 4
13	WEYANDT JOHN P SVP, Product & Process Dev.	2003-11-06 12:42:50	982,392 0	982,392	Form 4
14	HUDSON WILLIAM L Executive VP & General Counsel	2008-08-11 19:12:32	911,692 0	911,692	Form 5
15	DEXHEIMER BRIAN S President, Consumer Solutions	2008-09-16 16:21:58	568,331 30,000	598,331	Form 4
16	O MALLEY PATRICK J EVP & Chief Financial Officer	2015-09-23 21:10:38	136,793 403,699	540,492	Form 4
17	PORTER TOWNSEND H Executive VP and CTO	2003-12-02 17:50:02	530,565 0	530,565	Form 4
18	CHIRICO JAMES M EVP Global Disc Storage Ops	2007-07-26 16:43:51	482,571 0	482,571	Form 4
19	MOSLEY WILLIAM D CEO	2025-12-12 16:17:41	473,128 0	473,128	Form 4
20	Cunningham Terence Robert SVP, CONSUMER & i365	2009-03-10 17:05:50	375,000 0	375,000	Form 4
21	WICKERSHAM DAVID A President and COO	2008-09-16 16:18:54	334,857 0	334,857	Form 4
22	TENNENBAUM JEREMY Executive VP, Bus & Corp Devl	2004-02-09 18:23:50	232,620 25,000	257,620	Form 4
23	LUCZO STEPHEN J Director	2022-03-08 18:46:55	0 225,941	225,941	Form 4
24	WAITE DONALD L Executive VP & CAO	2004-03-08 16:42:24	41,054 144,721	185,775	Form 4
25	POPE CHARLES C EVP, PLANNING & DEVELOPMT	2008-10-29 17:24:20	80,200 76,900	157,100	Form 4
26	THOMPSON JOHN WENDELL Director	2011-08-15 17:51:30	11,250 143,160	154,410	Form 5
27	WINGERT MICHAEL J EVP, Maxtor Integration	2007-09-20 18:36:36	124,072 0	124,072	Form 4/A
28	Whitmore Robert W EVP & Chief Technical Officer	2013-05-31 16:15:31	123,364 0	123,364	Form 4
29	Pimentel Albert A President, Global Mkts and CSO	2015-09-23 21:03:59	38,226 79,202	117,428	Form 4
30	Nygaard Jeffrey D. EVP, Operations and Technology	2023-02-02 19:59:29	42,661 71,794	114,455	Form 4
31	PETERSON GLEN A Sr. VP, Worldwide Finance	2008-09-16 16:20:02	99,510 0	99,510	Form 4
32	ABBOTT TODD EVP, Sales, Mktg and Service	2008-05-20 14:17:25	88,000 0	88,000	Form 4
33	GLEMBOCKI JERRY S Sr. VP Heads and Media	2008-09-16 16:21:39	82,385 0	82,385	Form 4
34	Romano Gianluca EVP & CFO	2025-12-12 16:18:07	62,216 0	62,216	Form 4
35	PARK CHONG SUP Director	2018-10-22 18:11:05	16,809 32,527	49,336	Form 4
36	ZANDER EDWARD J Director	2023-10-24 18:42:31	0 45,813	45,813	Form 4
37	Teh Ban Seng EVP & Chief Commercial Officer	2025-12-12 16:17:48	43,863 0	43,863	Form 4
38	Naik Ravi EVP, Lyve Storage Services	2023-03-23 17:10:28	38,857 0	38,857	Form 4
39	SCHUELKE KATHERINE SVP, CLO & Corporate Secretary	2023-12-12 16:52:24	34,553 0	34,553	Form 4
40	DEHAAN DOUGLAS J General Manager, Samsung HDD	2015-09-23 21:05:48	32,517 0	32,517	Form 4
41	Richarz David K Executive Vice President,Sales	2015-04-28 16:08:49	31,944 0	31,944	Form 4
42	KIERNAN DONALD E Director	2008-11-03 18:00:41	18,750 11,250	30,000	Form 4
43	BRADLEY WILLIAM W Director	2009-10-30 14:25:29	22,500 2,500	25,000	Form 4
44	COULTER JAMES G Director	2005-10-31 17:20:42	25,000 0	25,000	Form 4
45	BONDERMAN DAVID Director	2003-11-03 18:14:36	25,000 0	25,000	Form 4
46	MARSHALL LYDIA MICHEAUX Director	2014-10-23 19:08:58	24,535 0	24,535	Form 4
47	Onken Kristen M Director	2016-10-20 16:14:12	23,729 0	23,729	Form 4
48	MORTON DAVID H JR EVP & CFO	2018-07-27 19:35:08	23,346 0	23,346	Form 4
49	COLEMAN WILLIAM T III Director	2020-10-23 19:08:03	20,330 0	20,330	Form 4
50	CHENG MEI WEI Director	2018-10-22 17:22:24	20,047 0	20,047	Form 4
51	Lerner James J President, Cloud Systems	2015-03-13 17:30:55	17,858 0	17,858	Form 4
52	MacPherson Regan J SVP and General Counsel	2016-11-18 17:53:25	16,702 0	16,702	Form 4
53	BRACE PHILIP G Former President, CSSG	2018-01-16 20:19:05	16,069 0	16,069	Form 4
54	Fochtman Jeffrey D. SVP, Business & Marketing	2022-09-14 17:42:56	14,736 0	14,736	Form 4
55	BRUNER JUDY Director	2025-10-21 16:04:48	0 14,314	14,314	Form 4
56	Morris John Christopher EVP & CTO	2025-12-16 16:12:11	14,250 0	14,250	Form 4
57	Tilenius Stephanie Director	2025-11-05 16:33:36	12,244 0	12,244	Form 4
58	MURPHY JAMES J EVP, Sales & Marketing	2019-12-23 17:44:24	10,569 0	10,569	Form 4
59	Hottier-Fayon Geraldine Interim Prin. Accounting Ofcr	2018-09-25 19:00:27	8,217 0	8,217	Form 4
60	Arumugavelu Shankar Director	2025-11-12 16:38:47	7,626 0	7,626	Form 4
61	BRUGGEWORTH ROBERT A Director	2024-10-22 18:14:22	6,591 0	6,591	Form 4
62	Chong Kian Fatt EVP Global Operations	2025-12-12 16:18:01	6,006 0	6,006	Form 4
63	Conyers Yolanda Lee Director	2025-12-02 17:32:35	5,601 0	5,601	Form 4
64	DAVIDSON JAMES Director	2008-08-11 18:54:10	5,000 0	5,000	Form 5
65	REYES GREGORIO Director	2015-10-23 17:18:44	0 4,485	4,485	Form 4
66	Scolnick Kathryn R. Interim CFO	2018-09-25 19:08:15	4,256 0	4,256	Form 4
67	JEONG SEH-WOONG Director	2014-10-23 19:22:19	2,518 0	2,518	Form 4
68	Anderson David Z VP, Finance, Treasurer & PAO	2009-10-27 13:15:40	2,500 0	2,500	Form 4
69	ROGGE KAREN M VP Corp. Finance and Treasurer	2006-11-16 16:39:05	1,890 0	1,890	Form 5
70	CANNON MICHAEL R Director	2025-10-28 16:29:20	1,868 0	1,868	Form 4
71	Haggart Dylan G. Director	2025-10-28 16:29:45	1,580 0	1,580	Form 4
72	CLEMMER RICHARD L Director	2025-10-28 16:29:26	1,580 0	1,580	Form 4
73	BHATT PRAT Director	2025-10-28 16:29:13	1,580 0	1,580	Form 4
74	Adams Mark Director	2025-10-28 16:29:01	1,580 0	1,580	Form 4
75	Geldmacher Jay L Director	2025-11-03 16:07:29	1,148 0	1,148	Form 4
76	Szlosek Thomas A Director	2025-11-12 16:38:55	357 0	357	Form 4/A
77	Lee James CI EVP & CLO	2025-11-12 16:39:12	257 0	257	Form 4
78	RE MARK SVP & CTO	2017-10-05 16:23:08	0 0	0	Form 4
79	MASSARONI KENNETH M SVP, Interim CLO	2017-10-05 16:24:42	0 0	0	Form 4
80	Moyo Dambisa F Director	2017-10-25 19:47:40	0 0	0	Form 4
81	BIONDI FRANK Director	2017-10-27 15:29:30	0 0	0	Form 4