Seagate Technology Holdings plc Insider Trading

STX

Last 12 months

Insiders sold $607M and bought nothing on the open market.

67% of the selling was scheduled in advance under 10b5-1 plans. CEO William D Mosley sold $75.6M on Sep 15, 21% of their stake, outside a plan. The last open-market buy by an executive or director was in Oct 2021.

Net open-market

−$607M

0 buys · 83 sales

Under a 10b5-1 plan

67%

of the value sold

Insiders who bought / sold

0 / 11

executives and directors

Last open-market buy

Oct 2021

Oct 7, 2021

Get an email when STX's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Nov 2	William D Mosley CEO	Sold10b5-1 plan 14 parts	6,720	$622.82 average	$4.19M	1.9%	Form 4
Nov 2	William D Mosley CEO	Sold10b5-1 plan 27 parts	23,280	$602.44 average	$14M	6.2%	Form 4
Oct 30	John Christopher Morris EVP & CTO	Sold10b5-1 plan 24 parts	2,675	$650.15 average	$1.74M	11%	Form 4
Oct 23	James Ci Lee EVP & CLO	SoldNo plan	547	$642.14	351K	35%	Form 4
Oct 1	William D Mosley CEO	Sold10b5-1 plan 16 parts	11,002	$935.60 average	$10.3M	2.9%	Form 4
Oct 1	William D Mosley CEO	Sold10b5-1 plan 28 parts	18,998	$914.67 average	$17.4M	4.8%	Form 4
Sep 21	John Christopher Morris EVP & CTO	Sold10b5-1 plan 26 parts	9,354	$877.91 average	$8.21M	29%	Form 4
Sep 15	Gianluca Romano EVP & CFO	SoldNo plan	49,984	$772.16	$38.6M	41%	Form 4
Sep 15	William D Mosley CEO	SoldNo plan	97,889	$772.14	$75.6M	21%	Form 4
Sep 15	Ban Seng Teh EVP & Chief Commercial Officer	Sold10b5-1 plan 24 parts	52,730	$782.08 average	$41.2M	90%	Form 4
Sep 15	John Christopher Morris EVP & CTO	SoldNo plan	15,466	$772.15	$11.9M	33%	Form 4
Sep 14	Ban Seng Teh EVP & Chief Commercial Officer	Sold10b5-1 plan	989	$779.00	770K	15%	Form 4
Sep 14	John Christopher Morris EVP & CTO	SoldNo plan	493	$781.23	385K	2.9%	Form 4
Sep 11 – 14	Gianluca Romano EVP & CFO	Sold10b5-1 plan 15 parts	5,555	$841.95 average	$4.68M	15%	Form 4
Sep 14	William D Mosley CEO	SoldNo plan	1,870	$781.23	$1.46M	0.6%	Form 4
Sep 11	Gianluca Romano EVP & CFO	Sold10b5-1 plan 24 parts	45,898	$830.01 average	$38.1M	57%	Form 4
Sep 10	Ban Seng Teh EVP & Chief Commercial Officer	Sold10b5-1 plan	663	$860.09	570K	10%	Form 4
Sep 10	John Christopher Morris EVP & CTO	SoldNo plan 2 parts	572	$862.14 average	493K	3.4%	Form 4
Sep 10	Gianluca Romano EVP & CFO	SoldNo plan 2 parts	1,348	$862.13 average	$1.16M	4.4%	Form 4
Sep 10	William D Mosley CEO	SoldNo plan 2 parts	2,849	$862.13 average	$2.46M	0.9%	Form 4
Sep 1	William D Mosley CEO	Sold10b5-1 plan 26 parts	30,000	$816.28 average	$24.5M	9.2%	Form 4
Sep 1	Yolanda Lee Conyers Director	Sold10b5-1 plan	750	$815.11	611K	18%	Form 4
Aug 24	James Ci Lee EVP & CLO	Sold10b5-1 plan 29 parts	9,013	$794.84 average	$7.16M	96%	Form 4
Aug 21	Ban Seng Teh EVP & Chief Commercial Officer	Sold10b5-1 plan 27 parts	9,862	$852.97 average	$8.41M	65%	Form 4
Aug 20 – 21	John Christopher Morris EVP & CTO	Sold10b5-1 plan 4 parts	4,039	$847.56 average	$3.42M	21%	Form 4
Aug 21	James Ci Lee EVP & CLO	SoldNo plan 3 parts	3,939	$849.35 average	$3.35M	43%	Form 4
Aug 21	Gianluca Romano EVP & CFO	SoldNo plan 3 parts	9,076	$849.35 average	$7.71M	24%	Form 4
Aug 21	William D Mosley CEO	SoldNo plan 3 parts	18,139	$849.35 average	$15.4M	5.5%	Form 4
Aug 20	Ban Seng Teh EVP & Chief Commercial Officer	Sold10b5-1 plan 19 parts	6,048	$842.97 average	$5.1M	29%	Form 4
Aug 13	Ban Seng Teh EVP & Chief Commercial Officer	SoldNo plan 2 parts	7,361	$920.80 average	$6.78M	72%	Form 4
Aug 7	Gianluca Romano EVP & CFO	Sold10b5-1 plan 8 parts	880	$845.12 average	744K	4.1%	Form 4
Aug 7	Gianluca Romano EVP & CFO	Sold10b5-1 plan 28 parts	14,091	$811.25 average	$11.4M	40%	Form 4
Aug 7	Gianluca Romano EVP & CFO	Sold10b5-1 plan 29 parts	7,240	$781.64 average	$5.66M	17%	Form 4
Aug 3	John Christopher Morris EVP & CTO	Sold10b5-1 plan	168	$817.76	137K	1.4%	Form 4
Aug 3	William D Mosley CEO	Sold10b5-1 plan 19 parts	17,080	$827.30 average	$14.1M	5.5%	Form 4
Aug 3	William D Mosley CEO	Sold10b5-1 plan 29 parts	12,920	$803.47 average	$10.4M	4.0%	Form 4
Jul 30	James Ci Lee EVP & CLO	Sold10b5-1 plan	694	$877.45	609K	67%	Form 4
Jul 23	James Ci Lee EVP & CLO	SoldNo plan	542	$905.01	491K	35%	Form 4
Jul 1	William D Mosley CEO	Sold10b5-1 plan 15 parts	9,343	$924.42 average	$8.64M	2.9%	Form 4
Jul 1	William D Mosley CEO	Sold10b5-1 plan 29 parts	20,657	$910.48 average	$18.8M	6.0%	Form 4

Nov 210b5-1 plan
William D Mosley
CEO · sold 6,720 at avg $622.82
$4.19M
1.9% of stake
Nov 210b5-1 plan
William D Mosley
CEO · sold 23,280 at avg $602.44
$14M
6.2% of stake
Oct 3010b5-1 plan
John Christopher Morris
EVP & CTO · sold 2,675 at avg $650.15
$1.74M
11% of stake
Oct 23No plan
James Ci Lee
EVP & CLO · sold 547 at $642.14
351K
35% of stake
Oct 110b5-1 plan
William D Mosley
CEO · sold 11,002 at avg $935.60
$10.3M
2.9% of stake
Oct 110b5-1 plan
William D Mosley
CEO · sold 18,998 at avg $914.67
$17.4M
4.8% of stake
Sep 2110b5-1 plan
John Christopher Morris
EVP & CTO · sold 9,354 at avg $877.91
$8.21M
29% of stake
Sep 15No plan
Gianluca Romano
EVP & CFO · sold 49,984 at $772.16
$38.6M
41% of stake
Sep 15No plan
William D Mosley
CEO · sold 97,889 at $772.14
$75.6M
21% of stake
Sep 1510b5-1 plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 52,730 at avg $782.08
$41.2M
90% of stake
Sep 15No plan
John Christopher Morris
EVP & CTO · sold 15,466 at $772.15
$11.9M
33% of stake
Sep 1410b5-1 plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 989 at $779.00
770K
15% of stake
Sep 14No plan
John Christopher Morris
EVP & CTO · sold 493 at $781.23
385K
2.9% of stake
Sep 11 – 1410b5-1 plan
Gianluca Romano
EVP & CFO · sold 5,555 at avg $841.95
$4.68M
15% of stake
Sep 14No plan
William D Mosley
CEO · sold 1,870 at $781.23
$1.46M
0.6% of stake
Sep 1110b5-1 plan
Gianluca Romano
EVP & CFO · sold 45,898 at avg $830.01
$38.1M
57% of stake
Sep 1010b5-1 plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 663 at $860.09
570K
10% of stake
Sep 10No plan
John Christopher Morris
EVP & CTO · sold 572 at avg $862.14
493K
3.4% of stake
Sep 10No plan
Gianluca Romano
EVP & CFO · sold 1,348 at avg $862.13
$1.16M
4.4% of stake
Sep 10No plan
William D Mosley
CEO · sold 2,849 at avg $862.13
$2.46M
0.9% of stake
Sep 110b5-1 plan
William D Mosley
CEO · sold 30,000 at avg $816.28
$24.5M
9.2% of stake
Sep 110b5-1 plan
Yolanda Lee Conyers
Director · sold 750 at $815.11
611K
18% of stake
Aug 2410b5-1 plan
James Ci Lee
EVP & CLO · sold 9,013 at avg $794.84
$7.16M
96% of stake
Aug 2110b5-1 plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 9,862 at avg $852.97
$8.41M
65% of stake
Aug 20 – 2110b5-1 plan
John Christopher Morris
EVP & CTO · sold 4,039 at avg $847.56
$3.42M
21% of stake
Aug 21No plan
James Ci Lee
EVP & CLO · sold 3,939 at avg $849.35
$3.35M
43% of stake
Aug 21No plan
Gianluca Romano
EVP & CFO · sold 9,076 at avg $849.35
$7.71M
24% of stake
Aug 21No plan
William D Mosley
CEO · sold 18,139 at avg $849.35
$15.4M
5.5% of stake
Aug 2010b5-1 plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 6,048 at avg $842.97
$5.1M
29% of stake
Aug 13No plan
Ban Seng Teh
EVP & Chief Commercial Officer · sold 7,361 at avg $920.80
$6.78M
72% of stake
Aug 710b5-1 plan
Gianluca Romano
EVP & CFO · sold 880 at avg $845.12
744K
4.1% of stake
Aug 710b5-1 plan
Gianluca Romano
EVP & CFO · sold 14,091 at avg $811.25
$11.4M
40% of stake
Aug 710b5-1 plan
Gianluca Romano
EVP & CFO · sold 7,240 at avg $781.64
$5.66M
17% of stake
Aug 310b5-1 plan
John Christopher Morris
EVP & CTO · sold 168 at $817.76
137K
1.4% of stake
Aug 310b5-1 plan
William D Mosley
CEO · sold 17,080 at avg $827.30
$14.1M
5.5% of stake
Aug 310b5-1 plan
William D Mosley
CEO · sold 12,920 at avg $803.47
$10.4M
4.0% of stake
Jul 3010b5-1 plan
James Ci Lee
EVP & CLO · sold 694 at $877.45
609K
67% of stake
Jul 23No plan
James Ci Lee
EVP & CLO · sold 542 at $905.01
491K
35% of stake
Jul 110b5-1 plan
William D Mosley
CEO · sold 9,343 at avg $924.42
$8.64M
2.9% of stake
Jul 110b5-1 plan
William D Mosley
CEO · sold 20,657 at avg $910.48
$18.8M
6.0% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch STX, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

STX is in 356 US ETFs. The largest of them, with STX's weight in each:

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Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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