WDC

WESTERN DIGITAL CORP

Data as of 2026 Q2 (06-30) · 13F snapshot

Summary

WESTERN DIGITAL CORP (WDC) is held as common stock by 8 tracked hedge-fund managers, with a combined reported value of ~$1.55B; the largest are Ken Griffin, Renaissance Technologies, Alex Sacerdote. 4 tracked managers also disclosed PUT or CALL positions, reported separately below. This quarter: 3 added, 5 trimmed. 20 public STOCK Act / OGE trade disclosures are on record. Data as of 2026 Q2, from public SEC 13F filings, delayed up to ~45 days.

Attention · HighThis quarter · Cooling

Common-stock holders84 also report options

Congress trades20

Price$453.48vs quarter-end-29.00%

Sectors2

This quarter's moves

New0

Added3

Trimmed / sold5

Top holder

Ken Griffin

Common-stock positions

PUT and CALL disclosures are excluded from these holder counts and values.

Renaissance TechnologiesTrim

Value $343.29M0.5% of portfolio537,4732026 Q2

Ray DalioTrim

Value $110.12M0.5% of portfolio172,4152026 Q2

Investor	Period	Value	Shares	% of portfolio	Action
Renaissance Technologies	2026 Q2	$343.29M	537,473	0.5%	Trim
Ray Dalio	2026 Q2	$110.12M	172,415	0.5%	Trim

PUT / CALL disclosures

Reported separately: 13F option values are not common-stock ownership and do not reveal the full strategy or economic exposure.

Ken GriffinPUT—

Value $3.69B— of portfolio5,777,7002026 Q2

Ken GriffinCALL—

Value $1.48B— of portfolio2,323,7002026 Q2

Izzy EnglanderPUT—

Value $209.44M— of portfolio327,9002026 Q2

Izzy EnglanderCALL—

Value $199.03M— of portfolio311,6002026 Q2

Steven CohenCALL—

Value $65.66M— of portfolio102,8002026 Q2

Steven CohenPUT—

Value $57.10M— of portfolio89,4002026 Q2

Paul Tudor JonesPUT—

Value $38.45M— of portfolio60,2002026 Q2

Paul Tudor JonesCALL—

Value $37.94M— of portfolio59,4002026 Q2

Investor	Period	Value	Shares	% of portfolio	Action
Ken GriffinPUT	2026 Q2	$3.69B	5,777,700	—	—
Ken GriffinCALL	2026 Q2	$1.48B	2,323,700	—	—
Izzy EnglanderPUT	2026 Q2	$209.44M	327,900	—	—
Izzy EnglanderCALL	2026 Q2	$199.03M	311,600	—	—
Steven CohenCALL	2026 Q2	$65.66M	102,800	—	—
Steven CohenPUT	2026 Q2	$57.10M	89,400	—	—
Paul Tudor JonesPUT	2026 Q2	$38.45M	60,200	—	—
Paul Tudor JonesCALL	2026 Q2	$37.94M	59,400	—	—

Insider Trading

Officers · directors · Form 4

Open-market purchases and sales (P/S)24

Irving Tan
Chief Executive Officer
Sell$1.09M
2,478 @ $441.48Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$2.88M
6,445 @ $446.38Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$691.3K
1,546 @ $447.18Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$437.4K
989 @ $442.22Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$836.0K
1,880 @ $444.67Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$2.15M
4,822 @ $445.45Traded 2026-08-11Filed 2026-08-12
Irving Tan
Chief Executive Officer
Sell$815.8K
1,840 @ $443.35Traded 2026-08-11Filed 2026-08-12
Martin I Cole
Director
Sell$138.5K
304 @ $455.55Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$47.9K
106 @ $452.12Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$142.4K
312 @ $456.52Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$17.5K
39 @ $449.42Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$31.6K
70 @ $451.30Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$65.3K
144 @ $453.27Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$58.2K
128 @ $454.44Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$67.3K
154 @ $436.89Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$44.3K
103 @ $430.45Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$51.7K
118 @ $438.08Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$14.9K
32 @ $465.12Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$49.2K
115 @ $428.08Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$39.9K
93 @ $429.12Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$16.4K
38 @ $432.20Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$48.6K
112 @ $433.84Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$18.4K
41 @ $448.46Traded 2026-07-28Filed 2026-07-29
Martin I Cole
Director
Sell$74.0K
160 @ $462.30Traded 2026-07-28Filed 2026-07-29

Insider transactions are public SEC Form 4 disclosures (company officers, directors, 10% owners), for research only — not investment advice.

Public SEC 13F filings may appear up to 45 days after quarter-end; STOCK Act / OGE trade filings are generally due within 45 days but may be late. Partial data only — research, not investment advice.