TWO SIGMA SECURITIES, LLC

Broker-Dealer

Position in WDC — Western Digital Corp

CIK 1450144 NEW YORK, NY

Back to WDC Full portfolio

Position in WDC

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$791,453

+$259,311 QoQ

Shares Held

2,926

-5.3% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.15%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

21 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in WDC Over Time

Shares Held

Position Value (USD)

Derivatives in WDC

reported options exposure · as of Sep 30, 2024

CallValue

$8,563,343

CallShares

165,900

PutValue

$8,785,298

PutShares

170,200

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Computer Hardware

Technology · as of Mar 31, 2026

TWO SIGMA SECURITIES, LLC holds $4,296,934 across 18 Computer Hardware names. WDC ranks #1 (18.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	WDC	Western Digital Corp This page	2,926	$791,453
2	P	Everpure, Inc.	9,029	$533,072
3	ANET	Arista Networks, Inc.	4,203	$516,044
4	HPQ	Hp Inc	19,687	$378,187
5	SMCI	Super Micro Computer, Inc.	14,427	$328,502
6	SNDK	Sandisk Corp	499	$317,034
7	IONQ	IonQ, Inc.	10,132	$292,105
8	RGTI	Rigetti Computing, Inc.	19,686	$276,391

All Filings in WDC

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48 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$791,453	2,926	-5.3%	Shares	Sole	2026-05-15
2025-12-31	$532,142	3,089	-30.1%	Shares	Sole	2026-02-17
2024-12-31	$199,217	4,420	-97.3%	Shares	Sole	2025-02-14
2024-09-30	$8,563,343	165,900	-2.5%	Call	Sole	2024-11-14
2024-09-30	$8,785,298	170,200	+1288.3%	Put	Sole	2024-11-14
2024-09-30	$632,830	12,260	-92.6%	Shares	Sole	2024-11-14
2024-06-30	$9,478,416	165,500	-7.8%	Call	Sole	2024-08-14
2024-06-30	$10,280,216	179,500	+148.6%	Put	Sole	2024-08-14
2024-06-30	$4,135,796	72,214	+60.8%	Shares	Sole	2024-08-14
2024-03-31	$2,317,011	44,921	-33.3%	Shares	Sole	2024-05-15
2024-03-31	$3,471,313	67,300	+11.6%	Call	Sole	2024-05-15
2024-03-31	$3,110,255	60,300	+217.4%	Put	Sole	2024-05-15
2023-12-31	$751,982	18,997	+22.6%	Shares	Sole	2024-02-14
2023-12-31	$613,556	15,500	-42.2%	Call	Sole	2024-02-14
2023-12-31	$1,060,859	26,800	+15.5%	Put	Sole	2024-02-14
2023-09-30	$800,163	23,200	-55.5%	Put	Sole	2023-11-14
2023-09-30	$1,796,918	52,100	+5.9%	Call	Sole	2023-11-14
2023-06-30	$1,410,549	49,200	-21.7%	Call	Sole	2023-08-14
2023-06-30	$1,800,457	62,800	+129.2%	Put	Sole	2023-08-14
2023-03-31	$780,165	27,400	-49.9%	Call	Sole	2023-05-15
2023-03-31	$1,557,484	54,700	+139.9%	Put	Sole	2023-05-15
2023-03-31	$649,274	22,803	-6.5%	Shares	Sole	2023-05-15
2022-12-31	$581,874	24,400	+111.9%	Call	Sole	2023-02-14
2022-12-31	$274,553	11,513	-68.4%	Shares	Sole	2023-02-14
2022-12-31	$868,041	36,400	+68.5%	Put	Sole	2023-02-14
2022-09-30	$531,429	21,600	+9.4%	Call	Sole	2022-11-14
2022-09-30	$485,765	19,744	-54.0%	Shares	Sole	2022-11-14
2022-09-30	$1,055,477	42,900	+77.8%	Put	Sole	2022-11-14
2022-06-30	$817,511	24,126	+180.5%	Shares	Sole	2022-08-15
2022-06-30	$291,411	8,600	-63.2%	Call	Sole	2022-08-15
2022-06-30	$792,911	23,400	+59.1%	Put	Sole	2022-08-15
2022-03-31	$551,928	14,707	-19.6%	Shares	Sole	2022-05-16
2022-03-31	$686,767	18,300	-6.6%	Call	Sole	2022-05-16
2022-03-31	$735,554	19,600	+196.3%	Put	Sole	2022-05-16
2021-12-31	$326,000	6,614	-87.1%	Shares	Sole	2022-02-14
2021-09-30	$2,188,488	51,300	+226.8%	Put	Sole	2021-11-15
2021-09-30	$669,771	15,700	-26.6%	Call	Sole	2021-11-15
2021-09-30	$912,851	21,398	+132.6%	Shares	Sole	2021-11-15
2021-06-30	$494,908	9,200	+27.8%	Put	Sole	2021-08-16
2021-06-30	$387,319	7,200	+84.8%	Call	Sole	2021-08-16
2021-06-30	$209,582	3,896	-36.7%	Shares	Sole	2021-08-16
2020-12-31	$257,775	6,157	-61.0%	Shares	Sole	2021-02-16
2020-12-31	$661,498	15,800	-28.5%	Put	Sole	2021-02-16
2020-12-31	$925,260	22,100	+234.8%	Call	Sole	2021-02-16
2020-09-30	$182,335	6,600	-34.0%	Put	Sole	2020-11-16
2020-09-30	$276,266	10,000	+81.8%	Call	Sole	2020-11-16
2020-06-30	$183,541	5,500	+10.0%	Call	Sole	2020-09-10
2020-03-31	$157,294	5,000	—	Call	Sole	2020-05-15
No filing history on record for this holder in this stock.