Seagate Technology Holdings STX Institutional Ownership

NASDAQ STX

$848.99 -96.58 (-10.21%)

At close: Oct 2, 2026 · 4:00 PM EDT

Institutions by Trading Activity

1,957 Institutions

Increased 1,205 61.6%

Unchanged 161 8.2%

Reduced 591 30.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

85.78%

▼-0.07 pp QoQ

Shares Held by Institutions

189.58Mn

of 221.00Mn outstanding

▲+3.45% QoQ

Shares Outstanding

221.00Mn

31.42Mn held outside 13F filers

Institutional Investors

1,957

filed 13F for Jun 2026

▲+502 vs prior quarter

Net Shares Added (QoQ)

+6.33Mn

accumulated since last quarter

Value of Holdings

$160.95Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Seagate Technology Holdings plc (NASDAQ:STX) has 3 institutional investors that have filed 13F reports for the period ending September 2026.

Their combined ownership stood at 0.1% of outstanding shares in September 2026, down from 85.8% in June 2026.
Their total shares held in STX decreased -17.14% from the prior quarter, while the number of investors in Seagate Technology Holdings decreased 99.73% year over year.
Among the 3 funds, 0 bought more Seagate Technology Holdings shares, 2 sold down, and 1 held their ground.
Altogether, these fund groups held 272.97K shares in STX by September 2026, down by 56.46K shares quarter on quarter, and down 193.7Mn shares year over year.
CACTI ASSET MANAGEMENT LLC holds the largest position in STX at 271.63K shares as of September 30, 2026, or 0.12% of shares outstanding.
The largest sellers of Seagate Technology Holdings for the quarter ending September 2026 were CACTI ASSET MANAGEMENT LLC (56.3K), Montecito Bank & Trust (161).
Per Business Quant data, the top 3 holders of Seagate Technology Holdings for the quarter ending September 2026 are CACTI ASSET MANAGEMENT LLC (271.63K), Montecito Bank & Trust (1.35K), Noble Wealth Management PBC (1).

Form 13F Holdings

1,956 Institutional Holders

Report period 30 Jun, 2026

Total shares held 189.58Mn

Of outstanding 85.78%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	15,166,793	6.86%	▲892,710	+6.25%	$14.64Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	14,630,067	6.62%	▲474,394	+3.35%	$14.12Bn
3	State Street Corp	0000093751	9,911,669	4.48%	▲590,037	+6.33%	$9.57Bn
4	FMR LLC	0000315066	8,153,134	3.69%	▼23,784	-0.29%	$7.87Bn
5	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	7,999,686	3.62%	▼3,095,222	-27.90%	$7.72Bn
6	Invesco Ltd.	0000914208	7,536,880	3.41%	▲4,937,030	+189.90%	$7.27Bn
7	WCM INVESTMENT MANAGEMENT, LLC	0001061186	5,320,463	2.41%	▲973,611	+22.40%	$5.15Bn
8	Jpmorgan Chase & Co	0000019617	5,201,103	2.35%	▼1,458,136	-21.90%	$5.04Bn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	5,155,435	2.33%	▲94,607	+1.87%	$4.96Bn
10	Morgan Stanley	0000895421	4,720,524	2.14%	▼38,788	-0.81%	$4.56Bn
11	Capital Research Global Investors	0001422848	4,326,781	1.96%	▼1,409,289	-24.57%	$4.18Bn
12	Sanders Capital, LLC	0001508097	3,487,219	1.58%	▼9,409,982	-72.96%	$3.37Bn
13	Goldman Sachs Group Inc	0000886982	3,440,106	1.56%	▼133,684	-3.74%	$3.32Bn
14	NORGES BANK	0001374170	3,095,723	1.40%	▲3,095,723	0.00%	$2.99Bn
15	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0000912938	2,560,276	1.16%	▲24,154	+0.95%	$2.51Bn
16	WELLINGTON MANAGEMENT GROUP LLP	0000902219	2,414,136	1.09%	▲2,326,538	+2,655.93%	$2.33Bn
17	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	2,138,429	0.97%	▲704,934	+49.18%	$2.06Bn
18	Bank Of America Corp /De/	0000070858	2,115,112	0.96%	▼1,265,328	-37.43%	$2.04Bn
19	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	0001694217	2,108,402	0.95%	▼1,511,670	-41.76%	$2.03Bn
20	Northern Trust Corp	0000073124	1,902,241	0.86%	▲5,248	+0.28%	$1.84Bn

Showing 1 to 20 of 1,956 holders