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NASDAQ · TECHNOLOGY · Holders

Seagate Technology PLC (STX) Institutional Ownership & Insider Trading History

Top STX institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.

Section freshness

Price Jun 23, 4:00 PM EDT · Statements Mar 30, 8:00 PM EDT

Source timingDetails

Data freshness

Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.

Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.

PriceLive
Last traded
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Fundamentalsevery 1 day
Provider checked
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Newsevery 4 hr
Latest item
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Ownership read

STX insider sentiment: Mixed, sale-heavy.

VANGUARD GROUP INC is the largest institutional holder. 103 sales and 17 purchases appear in the recent Form 4 filings. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.

Insider flow

STX

Purchases46.30K
Sales127.52K

Directional bars ignore awards, gifts, conversions, and tax withholding rows.

Top holder

28.12M

VANGUARD GROUP INC

Insider stance

Mixed, sale-heavy

$61.30M sold / $1.29M bought

Latest filing

Jun 12, 2026

Most recent holder or insider filing date

Filings shown

240

120 holder / 120 insider

Holder rows
120
Market data source
Latest filing
Jun 12, 2026
Most recent holder or insider filing date
Increased / initiated
61
57 decreased
Insider rows
120
Market data source

Top 120 institutional holders

Seagate Technology PLC (STX) institutional ownership

Ranked by reported share count, with position changes and latest filing dates where ownership data supplies them.

VANGUARD GROUP INC

Rank #1

12.5%

Shares
28.12M
Change
-20.86K
Change %
-7.00%
Filing
Dec 31, 2025

Decreased

BLACKROCK

Rank #2

6.33%

Shares
14.27M
Change
-1.84M
Change %
-11.43%
Filing
Mar 31, 2026

Decreased

VANGUARD CAPITAL MANAGEMENT LLC

Rank #3

6.28%

Shares
14.16M
Change
+14.16M
Change %
Filing
Mar 31, 2026

Initiated

SANDERS CAPITAL

Rank #4

5.72%

Shares
12.90M
Change
-4.28M
Change %
-24.93%
Filing
Mar 31, 2026

Decreased

VANGUARD PORTFOLIO MANAGEMENT LLC

Rank #5

4.92%

Shares
11.09M
Change
+11.09M
Change %
Filing
Mar 31, 2026

Initiated

STATE STREET CORP

Rank #6

4.14%

Shares
9.32M
Change
-49.17K
Change %
-53.00%
Filing
Mar 31, 2026

Decreased

FMR LLC

Rank #7

3.63%

Shares
8.18M
Change
+4.42M
Change %
+117.49%
Filing
Mar 31, 2026

Increased

JPMORGAN CHASE & CO

Rank #8

2.95%

Shares
6.66M
Change
-338.74K
Change %
-4.84%
Filing
Mar 31, 2026

Decreased

CAPITAL RESEARCH GLOBAL INVESTORS

Rank #9

2.55%

Shares
5.74M
Change
+1.22M
Change %
+27.13%
Filing
Mar 31, 2026

Increased

GEODE CAPITAL MANAGEMENT

Rank #10

2.25%

Shares
5.06M
Change
+164.01K
Change %
+3.35%
Filing
Mar 31, 2026

Increased

MORGAN STANLEY

Rank #11

2.11%

Shares
4.76M
Change
-558.20K
Change %
-10.50%
Filing
Mar 31, 2026

Decreased

WCM INVESTMENT MANAGEMENT

Rank #12

1.93%

Shares
4.35M
Change
-808.02K
Change %
-15.68%
Filing
Mar 31, 2026

Decreased

DZ BANK AG DEUTSCHE ZENTRAL GENOSSENSCHAFTS BANK

Rank #13

1.61%

Shares
3.62M
Change
-1.80M
Change %
-33.16%
Filing
Mar 31, 2026

Decreased

GOLDMAN SACHS GROUP INC

Rank #14

1.59%

Shares
3.57M
Change
+818.12K
Change %
+29.69%
Filing
Mar 31, 2026

Increased

FRANKLIN RESOURCES INC

Rank #15

1.56%

Shares
3.52M
Change
-507.93K
Change %
-12.62%
Filing
Mar 31, 2026

Decreased

BANK OF AMERICA CORP

Rank #16

1.50%

Shares
3.38M
Change
-900.16K
Change %
-21.03%
Filing
Mar 31, 2026

Decreased

INVESCO LTD.

Rank #17

1.15%

Shares
2.60M
Change
+40.92K
Change %
+1.60%
Filing
Mar 31, 2026

Increased

MASSACHUSETTS FINANCIAL SERVICES CO

Rank #18

1.13%

Shares
2.54M
Change
+527.61K
Change %
+26.27%
Filing
Mar 31, 2026

Increased

NORTHERN TRUST CORP

Rank #19

0.84%

Shares
1.90M
Change
-3.64K
Change %
-19.00%
Filing
Mar 31, 2026

Decreased

NORGES BANK

Rank #20

0.80%

Shares
1.81M
Change
+444.55K
Change %
+32.56%
Filing
Dec 31, 2025

Increased

NOMURA INVESTMENT MANAGEMENT BUSINESS TRUST

Rank #21

0.80%

Shares
1.80M
Change
+1.80M
Change %
+36716.63%
Filing
Mar 31, 2026

Increased

DEUTSCHE BANK AG\

Rank #22

0.78%

Shares
1.76M
Change
+159.21K
Change %
+9.95%
Filing
Mar 31, 2026

Increased

UBS AM

Rank #23

0.68%

Shares
1.53M
Change
+53.89K
Change %
+3.64%
Filing
Mar 31, 2026

Increased

LEGAL & GENERAL GROUP PLC

Rank #24

0.67%

Shares
1.51M
Change
-9.51K
Change %
-62.00%
Filing
Mar 31, 2026

Decreased

ARROWSTREET CAPITAL

Rank #25

0.64%

Shares
1.43M
Change
-1.76M
Change %
-55.11%
Filing
Mar 31, 2026

Decreased

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

Rank #26

0.61%

Shares
1.36M
Change
-12.95K
Change %
-94.00%
Filing
Mar 31, 2026

Decreased

D. E. SHAW & CO.

Rank #27

0.57%

Shares
1.29M
Change
+493.10K
Change %
+61.91%
Filing
Mar 31, 2026

Increased

PRICE T ROWE ASSOCIATES INC

Rank #28

0.56%

Shares
1.26M
Change
+95.20K
Change %
+8.18%
Filing
Mar 31, 2026

Increased

VANGUARD FIDUCIARY TRUST CO

Rank #29

0.53%

Shares
1.20M
Change
+1.20M
Change %
Filing
Mar 31, 2026

Initiated

HOLOCENE ADVISORS

Rank #30

0.48%

Shares
1.09M
Change
+328.50K
Change %
+43.27%
Filing
Mar 31, 2026

Increased

BANK OF NEW YORK MELLON CORP

Rank #31

0.47%

Shares
1.06M
Change
-183.65K
Change %
-14.79%
Filing
Mar 31, 2026

Decreased

ROYAL BANK OF CANADA

Rank #32

0.45%

Shares
1.01M
Change
-20.89K
Change %
-2.02%
Filing
Mar 31, 2026

Decreased

BANK OF MONTREAL

Rank #33

0.45%

Shares
1.01M
Change
+214.45K
Change %
+27.01%
Filing
Mar 31, 2026

Increased

AQR CAPITAL MANAGEMENT LLC

Rank #34

0.44%

Shares
1.00M
Change
+148.57K
Change %
+17.43%
Filing
Mar 31, 2026

Increased

JANUS HENDERSON GROUP PLC

Rank #35

0.43%

Shares
967.53K
Change
+943.17K
Change %
+3872.12%
Filing
Mar 31, 2026

Increased

RUSSELL INVESTMENTS GROUP

Rank #36

0.43%

Shares
966.46K
Change
+9.75K
Change %
+102.00%
Filing
Mar 31, 2026

Increased

AMUNDI

Rank #37

0.43%

Shares
965.57K
Change
+235.36K
Change %
+32.23%
Filing
Mar 31, 2026

Increased

POLAR CAPITAL HOLDINGS PLC

Rank #38

0.41%

Shares
933.86K
Change
-295.55K
Change %
-24.04%
Filing
Mar 31, 2026

Decreased

VALUE ALIGNED RESEARCH ADVISORS

Rank #39

0.41%

Shares
914.66K
Change
+788.38K
Change %
+624.30%
Filing
Mar 31, 2026

Increased

CANADA PENSION PLAN INVESTMENT BOARD

Rank #40

0.39%

Shares
883.57K
Change
-25.82K
Change %
-2.84%
Filing
Mar 31, 2026

Decreased

DIMENSIONAL FUND ADVISORS LP

Rank #41

0.37%

Shares
836.02K
Change
-63.05K
Change %
-7.01%
Filing
Mar 31, 2026

Decreased

NATIONAL PENSION SERVICE

Rank #42

0.37%

Shares
827.76K
Change
-169.46K
Change %
-16.99%
Filing
Mar 31, 2026

Decreased

NUVEEN

Rank #43

0.34%

Shares
771.38K
Change
-9.22K
Change %
-118.00%
Filing
Mar 31, 2026

Decreased

ATALAN CAPITAL PARTNERS

Rank #44

0.32%

Shares
718.80K
Change
-27.80K
Change %
-3.72%
Filing
Mar 31, 2026

Decreased

SWEDBANK AB

Rank #45

0.31%

Shares
709.16K
Change
+285.95K
Change %
+67.57%
Filing
Mar 31, 2026

Increased

BARCLAYS PLC

Rank #46

0.30%

Shares
669.83K
Change
-109.98K
Change %
-14.10%
Filing
Mar 31, 2026

Decreased

SWISS NATIONAL BANK

Rank #47

0.28%

Shares
639.40K
Change
+55.90K
Change %
+9.58%
Filing
Mar 31, 2026

Increased

UBS GROUP AG

Rank #48

0.28%

Shares
632.68K
Change
+75.35K
Change %
+13.52%
Filing
Mar 31, 2026

Increased

ACADIAN ASSET MANAGEMENT LLC

Rank #49

0.27%

Shares
604.89K
Change
-66.01K
Change %
-9.84%
Filing
Mar 31, 2026

Decreased

BNP PARIBAS FINANCIAL MARKETS

Rank #50

0.26%

Shares
590.50K
Change
-231.31K
Change %
-28.15%
Filing
Mar 31, 2026

Decreased

CASTLE HOOK PARTNERS LP

Rank #51

0.25%

Shares
561.65K
Change
-240.77K
Change %
-30.00%
Filing
Mar 31, 2026

Decreased

POINT72 ASSET MANAGEMENT

Rank #52

0.24%

Shares
546.38K
Change
+148.78K
Change %
+37.42%
Filing
Mar 31, 2026

Increased

FIRST TRUST ADVISORS LP

Rank #53

0.24%

Shares
536.66K
Change
-22.65K
Change %
-4.05%
Filing
Mar 31, 2026

Decreased

SOROBAN CAPITAL PARTNERS LP

Rank #54

0.24%

Shares
534.36K
Change
Change %
0.00%
Filing
Mar 31, 2026

Unchanged

MAPLE ROCK CAPITAL PARTNERS INC.

Rank #55

0.24%

Shares
533.99K
Change
-131.87K
Change %
-19.80%
Filing
Mar 31, 2026

Decreased

SANDS CAPITAL MANAGEMENT

Rank #56

0.24%

Shares
531.89K
Change
+531.89K
Change %
Filing
Mar 31, 2026

Initiated

CACTI ASSET MANAGEMENT LLC

Rank #57

0.23%

Shares
526.00K
Change
-4.39K
Change %
-83.00%
Filing
Mar 31, 2026

Decreased

SUMITOMO MITSUI TRUST GROUP

Rank #58

0.23%

Shares
522.34K
Change
+3.54K
Change %
+68.00%
Filing
Mar 31, 2026

Increased

MITSUBISHI UFJ ASSET MANAGEMENT CO.

Rank #59

0.23%

Shares
518.45K
Change
+40.80K
Change %
+8.54%
Filing
Mar 31, 2026

Increased

WT ASSET MANAGEMENT LTD

Rank #60

0.22%

Shares
489.79K
Change
+278.58K
Change %
+131.91%
Filing
Mar 31, 2026

Increased

VANGUARD GLOBAL ADVISERS

Rank #61

0.21%

Shares
477.17K
Change
+477.17K
Change %
Filing
Mar 31, 2026

Initiated

BNP PARIBAS ASSET MANAGEMENT HOLDING S.A.

Rank #62

0.19%

Shares
433.17K
Change
+358.94K
Change %
+483.56%
Filing
Mar 31, 2026

Increased

AMERIPRISE FINANCIAL INC

Rank #63

0.19%

Shares
429.00K
Change
+18.00K
Change %
+4.38%
Filing
Mar 31, 2026

Increased

BALYASNY ASSET MANAGEMENT L.P.

Rank #64

0.18%

Shares
396.14K
Change
+388.50K
Change %
+5090.46%
Filing
Mar 31, 2026

Increased

RAYMOND JAMES FINANCIAL INC

Rank #65

0.17%

Shares
385.33K
Change
-20.71K
Change %
-5.10%
Filing
Mar 31, 2026

Decreased

AVALA GLOBAL LP

Rank #66

0.17%

Shares
379.43K
Change
+76.00K
Change %
+25.05%
Filing
Mar 31, 2026

Increased

HSBC HOLDINGS PLC

Rank #67

0.17%

Shares
378.53K
Change
+206.20K
Change %
+119.65%
Filing
Mar 31, 2026

Increased

VANGUARD ASSET MANAGEMENT

Rank #68

0.17%

Shares
376.31K
Change
+376.31K
Change %
Filing
Mar 31, 2026

Initiated

CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM

Rank #69

0.16%

Shares
360.40K
Change
+2.62K
Change %
+73.00%
Filing
Mar 31, 2026

Increased

CITIGROUP INC

Rank #70

0.15%

Shares
336.56K
Change
-28.04K
Change %
-7.69%
Filing
Mar 31, 2026

Decreased

ANTHER CAPITAL LTD

Rank #71

0.15%

Shares
331.23K
Change
+331.23K
Change %
Filing
Mar 31, 2026

Initiated

TOMS CAPITAL INVESTMENT MANAGEMENT LP

Rank #72

0.15%

Shares
331.00K
Change
+331.00K
Change %
Filing
Mar 31, 2026

Initiated

BRIDGEWATER ASSOCIATES

Rank #73

0.15%

Shares
329.12K
Change
+49.14K
Change %
+17.55%
Filing
Mar 31, 2026

Increased

WELLS FARGO & COMPANY

Rank #74

0.14%

Shares
325.41K
Change
-41.34K
Change %
-11.27%
Filing
Mar 31, 2026

Decreased

PROSHARE ADVISORS LLC

Rank #75

0.14%

Shares
318.51K
Change
-62.34K
Change %
-16.37%
Filing
Mar 31, 2026

Decreased

MIRAE ASSET GLOBAL ETFS HOLDINGS LTD.

Rank #76

0.14%

Shares
311.45K
Change
+18.77K
Change %
+6.41%
Filing
Mar 31, 2026

Increased

RENAISSANCE TECHNOLOGIES LLC

Rank #77

0.14%

Shares
310.49K
Change
-71.40K
Change %
-18.70%
Filing
Mar 31, 2026

Decreased

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

Rank #78

0.14%

Shares
307.29K
Change
-93
Change %
-3.00%
Filing
Mar 31, 2026

Decreased

ENVESTNET ASSET MANAGEMENT INC

Rank #79

0.14%

Shares
305.14K
Change
+30.94K
Change %
+11.28%
Filing
Mar 31, 2026

Increased

CONNOR

Rank #80

0.13%

Shares
298.20K
Change
-79.98K
Change %
-21.15%
Filing
Mar 31, 2026

Decreased

PALESTRA CAPITAL MANAGEMENT LLC

Rank #81

0.13%

Shares
294.00K
Change
+294.00K
Change %
Filing
Mar 31, 2026

Initiated

AMANAH HOLDINGS TRUST

Rank #82

0.13%

Shares
289.77K
Change
Change %
0.00%
Filing
Mar 31, 2026

Unchanged

SQUAREPOINT OPS LLC

Rank #83

0.12%

Shares
268.87K
Change
-279.99K
Change %
-51.01%
Filing
Mar 31, 2026

Decreased

LPL FINANCIAL LLC

Rank #84

0.12%

Shares
265.91K
Change
+18.62K
Change %
+7.53%
Filing
Mar 31, 2026

Increased

HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND

Rank #85

0.12%

Shares
261.85K
Change
-31.17K
Change %
-10.64%
Filing
Mar 31, 2026

Decreased

ENSIGN PEAK ADVISORS

Rank #86

0.11%

Shares
255.73K
Change
+43.36K
Change %
+20.42%
Filing
Mar 31, 2026

Increased

MILLENNIUM MANAGEMENT LLC

Rank #87

0.11%

Shares
250.28K
Change
+168.70K
Change %
+206.79%
Filing
Mar 31, 2026

Increased

FOCUS PARTNERS WEALTH

Rank #88

0.11%

Shares
249.28K
Change
-79.11K
Change %
-24.09%
Filing
Mar 31, 2026

Decreased

SEI INVESTMENTS CO

Rank #89

0.11%

Shares
247.15K
Change
-52.48K
Change %
-17.52%
Filing
Mar 31, 2026

Decreased

KBC GROUP NV

Rank #90

0.11%

Shares
245.06K
Change
-393.55K
Change %
-61.63%
Filing
Mar 31, 2026

Decreased

PRINCIPAL FINANCIAL GROUP INC

Rank #91

0.11%

Shares
243.64K
Change
+743
Change %
+31.00%
Filing
Mar 31, 2026

Increased

NATIONAL BANK OF CANADA

Rank #92

0.10%

Shares
233.32K
Change
-1.68K
Change %
-71.00%
Filing
Mar 31, 2026

Decreased

PRIMECAP MANAGEMENT CO

Rank #93

0.10%

Shares
230.33K
Change
-153.95K
Change %
-40.06%
Filing
Mar 31, 2026

Decreased

HRT FINANCIAL LP

Rank #94

0.10%

Shares
229.53K
Change
+229.53K
Change %
Filing
Mar 31, 2026

Initiated

RHUMBLINE ADVISERS

Rank #95

0.10%

Shares
229.21K
Change
-7.39K
Change %
-3.12%
Filing
Mar 31, 2026

Decreased

ALLIANZ ASSET MANAGEMENT GMBH

Rank #96

0.10%

Shares
227.37K
Change
-54.61K
Change %
-19.37%
Filing
Mar 31, 2026

Decreased

M&G PLC

Rank #97

0.10%

Shares
221.91K
Change
-92.48K
Change %
-29.42%
Filing
Mar 31, 2026

Decreased

NATIXIS ADVISORS

Rank #98

0.09%

Shares
214.00K
Change
+58.99K
Change %
+38.06%
Filing
Mar 31, 2026

Increased

STOREBRAND ASSET MANAGEMENT AS

Rank #99

0.09%

Shares
212.79K
Change
-26.95K
Change %
-11.24%
Filing
Mar 31, 2026

Decreased

TRIVEST ADVISORS LTD

Rank #100

0.09%

Shares
208.00K
Change
-116.00K
Change %
-35.80%
Filing
Mar 31, 2026

Decreased

WOODLINE PARTNERS LP

Rank #101

0.09%

Shares
207.51K
Change
+115.39K
Change %
+125.26%
Filing
Mar 31, 2026

Increased

VIRGINIA RETIREMENT SYSTEM

Rank #102

0.09%

Shares
199.80K
Change
-47.50K
Change %
-19.21%
Filing
Dec 31, 2025

Decreased

VICTORY CAPITAL MANAGEMENT INC

Rank #103

0.09%

Shares
195.67K
Change
-10.94K
Change %
-5.29%
Filing
Mar 31, 2026

Decreased

ALLIANCEBERNSTEIN L.P.

Rank #104

0.09%

Shares
195.37K
Change
-1.40K
Change %
-71.00%
Filing
Mar 31, 2026

Decreased

OXBOW CAPITAL MANAGEMENT

Rank #105

0.08%

Shares
190.21K
Change
-124.41K
Change %
-39.54%
Filing
Mar 31, 2026

Decreased

TEACHER RETIREMENT SYSTEM OF TEXAS

Rank #106

0.08%

Shares
190.13K
Change
+54.39K
Change %
+40.07%
Filing
Mar 31, 2026

Increased

NEW YORK STATE TEACHERS RETIREMENT SYSTEM

Rank #107

0.08%

Shares
185.71K
Change
-1.33K
Change %
-71.00%
Filing
Mar 31, 2026

Decreased

ADAGE CAPITAL PARTNERS GP

Rank #108

0.08%

Shares
185.40K
Change
+18.20K
Change %
+10.88%
Filing
Mar 31, 2026

Increased

ABERDEEN GROUP PLC

Rank #109

0.08%

Shares
184.19K
Change
+5.38K
Change %
+3.01%
Filing
Mar 31, 2026

Increased

AVIVA PLC

Rank #110

0.08%

Shares
183.15K
Change
+5.38K
Change %
+3.02%
Filing
Mar 31, 2026

Increased

ARTEMIS INVESTMENT MANAGEMENT LLP

Rank #111

0.08%

Shares
182.76K
Change
-310.72K
Change %
-62.97%
Filing
Mar 31, 2026

Decreased

CHURCHILL MANAGEMENT CORP

Rank #112

0.08%

Shares
182.38K
Change
+135
Change %
+7.00%
Filing
Jun 30, 2025

Increased

FEDERATED HERMES

Rank #113

0.08%

Shares
180.88K
Change
-43.73K
Change %
-19.47%
Filing
Mar 31, 2026

Decreased

MACKENZIE FINANCIAL CORP

Rank #114

0.08%

Shares
179.70K
Change
+16.39K
Change %
+10.04%
Filing
Mar 31, 2026

Increased

KOREA INVESTMENT CORP

Rank #115

0.08%

Shares
179.54K
Change
-49.03K
Change %
-21.45%
Filing
Mar 31, 2026

Decreased

HAWK RIDGE CAPITAL MANAGEMENT LP

Rank #116

0.08%

Shares
173.30K
Change
-27.60K
Change %
-13.74%
Filing
Mar 31, 2026

Decreased

SUSQUEHANNA INTERNATIONAL GROUP

Rank #117

0.08%

Shares
170.19K
Change
+25.05K
Change %
+17.26%
Filing
Mar 31, 2026

Increased

MIRAE ASSET GLOBAL INVESTMENTS CO.

Rank #118

0.08%

Shares
169.19K
Change
+64.06K
Change %
+60.94%
Filing
Mar 31, 2026

Increased

NEUBERGER BERMAN GROUP LLC

Rank #119

0.07%

Shares
166.52K
Change
+63.44K
Change %
+61.55%
Filing
Mar 31, 2026

Increased

HANDELSBANKEN FONDER AB

Rank #120

0.07%

Shares
164.25K
Change
+50.36K
Change %
+44.22%
Filing
Mar 31, 2026

Increased

Showing 120 of 120 matching institutional rows.

Recent insider transactions

Seagate Technology PLC (STX) Form 4 filings

Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.

MORRIS, JOHN CHRISTOPHER

EVP & CTO

SaleOpen-market or direct sale reported on Form 4.
Shares
466
% company
<0.01%
Price
$880.19
Value
$410,169

Filed Jun 12, 2026

TEH, BAN SENG

EVP & Chief Commercial Officer

SaleOpen-market or direct sale reported on Form 4.
Shares
989
% company
<0.01%
Price
$880.19
Value
$870,508

Filed Jun 12, 2026

MORRIS, JOHN CHRISTOPHER

EVP & CTO

SaleOpen-market or direct sale reported on Form 4.
Shares
898
% company
<0.01%
Price
$880.19
Value
$790,411

Filed Jun 12, 2026

ROMANO, GIANLUCA

EVP & CFO

SaleOpen-market or direct sale reported on Form 4.
Shares
903
% company
<0.01%
Price
$880.19
Value
$795,029

Filed Jun 12, 2026

MOSLEY, WILLIAM D

Director, CEO

SaleOpen-market or direct sale reported on Form 4.
Shares
1.77K
% company
<0.01%
Price
$880.19
Value
$1,556,394

Filed Jun 12, 2026

TEH, BAN SENG

EVP & Chief Commercial Officer

SaleOpen-market or direct sale reported on Form 4.
Shares
989
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

CHONG, KIAN FATT

EVP Global Operations

PurchaseOpen-market or direct purchase reported on Form 4.
Shares
678
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

CHONG, KIAN FATT

EVP Global Operations

SaleOpen-market or direct sale reported on Form 4.
Shares
678
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

ROMANO, GIANLUCA

EVP & CFO

PurchaseOpen-market or direct purchase reported on Form 4.
Shares
1.70K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

MOSLEY, WILLIAM D

Director, CEO

PurchaseOpen-market or direct purchase reported on Form 4.
Shares
3.32K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

ROMANO, GIANLUCA

EVP & CFO

SaleOpen-market or direct sale reported on Form 4.
Shares
1.70K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

MOSLEY, WILLIAM D

Director, CEO

SaleOpen-market or direct sale reported on Form 4.
Shares
3.32K
% company
<0.01%
Price
Not reported
Value
Not reported

Filed Jun 11, 2026

Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders

Frequently asked

Common questions.

Who are the largest STX shareholders?

VANGUARD GROUP INC is the largest institutional holder of STX, with 28.12 million shares, or about 12.48% of shares outstanding. Additional institutions are ranked by reported share count.

What is institutional ownership of STX?

Seagate Technology PLC (STX) has 120 institutional holders on file — 61 that increased or initiated positions and 57 that reduced them, as of the latest filing on Mar 31, 2026.

Where can I see Seagate Technology PLC insider transactions?

Seagate Technology PLC (STX) has 120 Form 4 insider transactions on file, most recently on Jun 12, 2026, separated into purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are distinguished from open-market trades.

Are STX insiders buying or selling?

Recent STX insider activity reads Mixed, sale-heavy: 103 sales and 17 purchases. Awards, gifts, conversions, and tax withholding are listed separately because they do not carry the same signal as open-market trades.

Who is the most active STX insider?

MOSLEY, WILLIAM D is the most active STX insider by absolute share movement, with 137,721 shares moving across the filing history. Review the action labels before treating that activity as buying or selling.