Seagate Technology Holdings PLC

STX • NASDAQ

Seagate Technology Holdings PLC is a computer hardware company in the technology sector on NASDAQ, led by William D. Mosley, with a market cap of $57.9B. As of Q3 2025, 90% of shares are held by 1,091 institutional investors, with VANGUARD GROUP INC as the largest holder at 13.21%.

Chief Executive OfficerWilliam D. Mosley

Market Cap$57.9B

Computer Hardware

Technology

Employees33.4K

Websiteseagate.com

Country

United States of America

Overview

Overview of institutional ownership in STX as of Q3 2025 with a market cap of $50.3B

All Institutions

Institutions: 1,091
Value Held: $45.4B
Shares Held: 192.5M
Avg Position: $41.6M
Median Position: $903.9K

Hedge Funds

Hedge Funds: 87
Value Held: $3.4B
Shares Held: 14.5M
Avg Position: $39.3M
Median Position: $8.1M

Ownership Breakdown

Institutional (non-HF)

83.48%

$42.0B

Hedge Funds

6.8%

$3.4B

Retail & Other

9.72%

$4.9B

Based on market cap of $50.3B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in STX as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
VANGUARD GROUP INC Institution	Salim Ramji CEO	$6.6B 0.10% of portfolio	13.21% 28.1M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
Sanders Capital, LLC Long Only Manager	Lewis Alan Sanders CEO	$4.1B 5.09% of portfolio	8.24% 17.5M shares	Q3 2021 Held for 4y 2m	$81.3B
B BlackRock, Inc. Institution	-	$3.4B 0.06% of portfolio	6.76% 14.4M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
JPMORGAN CHASE & CO Institution	Jamie Dimon CEO	$3.3B 0.21% of portfolio	6.54% 13.9M shares	≤ Q2 2013 Held for 12y 5m+	$1.56T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$2.2B 0.08% of portfolio	4.36% 9.3M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
FRANKLIN RESOURCES INC Institution	Gregory E. Johnson CEO	$1.9B 0.48% of portfolio	3.79% 8.1M shares	≤ Q2 2013 Held for 12y 5m+	$395.56B
BANK OF AMERICA CORP /DE/ Institution	Brian T. Moynihan CEO	$1.8B 0.13% of portfolio	3.56% 7.6M shares	≤ Q2 2013 Held for 12y 5m+	$1.33T
Capital Research Global Investors RIA/Wealth	Sardar Sheraz Iftikhar CEO	$1.5B 0.27% of portfolio	2.91% 6.2M shares	Q3 2023 Held for 2y 2m	$532.36B
MORGAN STANLEY RIA/Wealth	Jed Finn CEO	$1.2B 0.07% of portfolio	2.38% 5.1M shares	≤ Q2 2013 Held for 12y 5m+	$1.65T
WCM INVESTMENT MANAGEMENT/CA Long Only Manager	Mike Brady Trigg CEO	$1.2B 2.47% of portfolio	2.43% 5.2M shares	Q3 2025 Held for 2 months	$48.1B

Net Capital Flow

Institutional buying and selling activity for STX in Q3 2025

Net Flow: −$2.9B
Buyers: 376
Sellers: 396
Total Bought: +$3.4B
Total Sold: −$6.3B
Avg Position: $47.0M

Biggest Buyers

Institution	Net Bought	Current Position
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	+$636.9M +2.7M shares	$696.3M 2.9M shares
GOLDMAN SACHS GROUP INC Institution	+$466.3M +2.0M shares	$879.6M 3.7M shares
BANK OF AMERICA CORP /DE/ Institution	+$232.6M +985.3K shares	$1.8B 7.6M shares
Walleye Trading LLC RIA/Wealth	+$174.5M +739.2K shares	$179.2M 759.2K shares
C CANADA PENSION PLAN INVESTMENT BOARD Institution	+$163.6M +692.9K shares	$188.6M 799.1K shares
B BlackRock, Inc. Institution	+$117.2M +496.6K shares	$3.4B 14.4M shares
VANGUARD GROUP INC Institution	+$104.5M +442.7K shares	$6.6B 28.1M shares
Polar Capital Holdings Plc Long Only Manager	+$90.8M +384.9K shares	$349.2M 1.5M shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	+$78.2M +331.2K shares	$131.3M 556.1K shares
D D. E. Shaw & Co., Inc. Institution	+$74.8M +317.0K shares	$473.4M 2.0M shares

Biggest Sellers

Institution	Net Sold	Current Position
JPMORGAN CHASE & CO Institution	−$1.1B −4.8M shares	$3.3B 13.9M shares
FMR LLC Institution	−$1.0B −4.4M shares	$467.7M 2.0M shares
Slate Path Capital LP Hedge Fund•Long/Short	−$398.7M −1.7M shares	$155.5M 658.9K shares
Capital Research Global Investors RIA/Wealth	−$260.6M −1.1M shares	$1.5B 6.2M shares
Sachem Head Capital Management LP Hedge Fund•Long/Short	−$219.7M −1.5M shares	Sold Off 0 shares
Soroban Capital Partners LLC Hedge Fund•Long/Short	−$208.5M −883.2K shares	$126.1M 534.4K shares
Sanders Capital, LLC Long Only Manager	−$127.7M −541.0K shares	$4.1B 17.5M shares
N Neuberger Berman Group LLC Institution	−$124.9M −528.9K shares	$30.3M 128.4K shares
RENAISSANCE TECHNOLOGIES LLC Hedge Fund•Quant	−$124.7M −528.2K shares	$13.5M 57.1K shares
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	−$115.7M −490.3K shares	$13.4M 56.9K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited STX in Q3 2025

New Positions: 144
New Value: $1.8B
Exited Positions: 82
Exited Value: $596.0M

New Positions

Institution	Position Value
WCM INVESTMENT MANAGEMENT/CA Long Only Manager	$1.2B 5.2M shares
Trivest Advisors Ltd Institution	$170.4M 722.0K shares
O Oxbow Capital Management Ltd Institution	$104.6M 443.0K shares
B Blue Whale Capital LLP Institution	$52.3M 221.7K shares
R Rivermont Capital Management LP Hedge Fund•Long/Short	$35.5M 150.2K shares
Atika Capital Management LLC Hedge Fund•Long/Short	$27.9M 118.1K shares
Kinetic Partners Management, LP Hedge Fund•Long/Short	$23.7M 100.3K shares
W WT Asset Management Ltd Institution	$22.4M 95.0K shares
Cercano Management LLC Family Office	$15.1M 63.8K shares
G GF FUND MANAGEMENT CO. LTD. Institution	$14.1M 59.8K shares

Exited Positions

Institution	Previous Position
Sachem Head Capital Management LP Hedge Fund•Long/Short	$219.7M 1.5M shares
M MIZUHO MARKETS AMERICAS LLC Institution	$45.5M 315.2K shares
D Delta Global Management LP Hedge Fund•Market Neutral	$44.6M 309.0K shares
T TWINBEECH CAPITAL LP Hedge Fund•Quant	$33.1M 229.1K shares
Wolf Hill Capital Management, LP Hedge Fund•Long/Short	$28.9M 200.0K shares
Junto Capital Management LP Hedge Fund•Long/Short	$27.6M 191.4K shares
R Rheos Capital Works Inc. Institution	$23.7M 164.5K shares
TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy	$18.9M 131.1K shares
M Mondrian Capital Management, LLC Hedge Fund•Long/Short	$9.7M 67.1K shares
S Skandinaviska Enskilda Banken AB Institution	$9.5M 65.8K shares

Options Activity

Institutions with the largest Call and Put options positions in STX as of Q3 2025

Call Positions: 43
Call Value: $1.7B
Put Positions: 49
Put Value: $2.0B

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$409.1M 17.3K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$334.2M 14.2K contracts
J JANE STREET GROUP, LLC Institution	$161.0M 6.8K contracts
P PEAK6 LLC Institution	$77.6M 3.3K contracts
S Squarepoint Ops LLC Hedge Fund•Quant	$73.3M 3.1K contracts
GOLDMAN SACHS GROUP INC Institution	$66.1M 2.8K contracts
W WOLVERINE TRADING, LLC Institution	$65.1M 2.8K contracts
Walleye Trading LLC RIA/Wealth	$58.8M 2.5K contracts
D D. E. Shaw & Co., Inc. Institution	$52.0M 2.2K contracts
CITIGROUP INC Institution	$51.1M 2.2K contracts

Put Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$530.4M 22.5K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$393.4M 16.7K contracts
Walleye Trading LLC RIA/Wealth	$179.2M 7.6K contracts
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	$90.9M 3.9K contracts
R Rokos Capital Management LLP Hedge Fund•Global Macro	$74.8M 3.2K contracts
D D. E. Shaw & Co., Inc. Institution	$73.4M 3.1K contracts
J JANE STREET GROUP, LLC Institution	$70.9M 3.0K contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$70.5M 3.0K contracts
S Squarepoint Ops LLC Hedge Fund•Quant	$66.9M 2.8K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$61.7M 2.6K contracts

Most Committed Institutions

Institutions with STX as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
O Oxbow Capital Management Ltd Institution	-	17.10% $104.6M	0.21% 443.0K shares	Q3 2025 Held for 2 months	$611.7M
A Atalan Capital Partners, LP Hedge Fund•Long/Short	David Randolph Thomas Managing Partner	12.30% $176.2M	0.35% 746.6K shares	Q2 2025 Held for 5 months	$1.4B
R Rivermont Capital Management LP Hedge Fund•Long/Short	Frank Rosser Gough Managing Partner	9.37% $35.5M	0.07% 150.2K shares	Q3 2025 Held for 2 months	$378.6M
Aufman Associates Inc RIA/Wealth	Edward J Aufman Chairman	9.35% $16.6M	0.03% 70.4K shares	Q4 2019 Held for 5y 11m	$177.7M
CACTI ASSET MANAGEMENT LLC RIA/Wealth	Joshua Steven Pechter Managing Partner	7.81% $117.4M	0.25% 539.8K shares	Q3 2017 Held for 8y 2m	$1.5B
P Panoramic Capital, LLC Hedge Fund•Long/Short	Irene Lan Chou CFO	7.62% $12.0M	0.02% 51.0K shares	Q4 2024 Held for 11 months	$157.8M
M Maple Rock Capital Partners, Inc. Hedge Fund•Multi-Strategy	Xavier George Majic CEO	6.83% $174.8M	0.35% 740.4K shares	Q2 2024 Held for 1y 5m	$2.6B
P potrero capital research llc Hedge Fund•Long/Short	Jack R Ripsteen Managing Partner	5.86% $19.4M	0.04% 82.1K shares	Q2 2025 Held for 5 months	$330.9M
T Twin Lakes Capital Management, LLC RIA/Wealth	Frank Kwangjae Yi President	5.84% $12.4M	0.02% 52.5K shares	Q4 2020 Held for 4y 11m	$212.2M
APIS CAPITAL ADVISORS, LLC Hedge Fund•Long/Short	Daniel James Barker CIO	5.72% $27.0M	0.05% 114.3K shares	Q2 2025 Held for 5 months	$471.4M

Hedge Fund Spotlight

Discover hedge funds investing in STX

potrero capital research llc

Hedge Fund • Long/Short

Portfolio ManagerJack R Ripsteen

Portfolio Value: $330.9M
Positions: 38
Last Reported: Q3 2025

Sector Allocation

Position in Seagate Technology Holdings PLC

Market Value: $19.4M
Shares Held: 82.1K
Portfolio Weight: 5.86%
Owned Since: 2025-Q2

Top Holding	Sector	Market Value	Weight
1 Talen Energy Corporation TLN	Unknown Unknown	$39.8M	12.02%
2 TransAlta TAC	Independent Power Producers Utilities	$34.4M	10.41%
3 Microsoft MSFT	Software - Infrastructure Technology	$20.0M	6.06%