Twin Tree Management, LP

Position in WDC — Western Digital Corp

CIK 1535588 DALLAS, TX

Back to WDC Full portfolio

Position in WDC

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$3,603,658

+$3,467,061 QoQ

Shares Held

5,642

+1017.2% QoQ

Ownership

0.002%

of shares outstanding

% of Portfolio

0.63%

of 13F equity value

Holder Rank

#671

of 1,836 holders

Holding Since

Mar 2020

21 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in WDC Over Time

Shares Held

Position Value (USD)

Derivatives in WDC

reported options exposure · as of Mar 31, 2026

CallValue

CallShares

PutValue

$513,931

PutShares

1,900

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 Jun 30, 2026

Twin Tree Management, LP holds $15,619,478 across 8 Computer Hardware names. WDC ranks #2 (23.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	STX	Seagate Technology Holdings plc	5,075	$4,897,375
2	WDC	Western Digital Corp This page	5,642	$3,603,658
3	SMCI	Super Micro Computer, Inc.	69,273	$2,031,777
4	DELL	Dell Technologies Inc.	3,694	$1,593,813
5	HPQ	Hp Inc	52,908	$1,160,801
6	P	Everpure, Inc.	11,969	$943,037
7	IONQ	IonQ, Inc.	13,420	$714,749
8	RGTI	Rigetti Computing, Inc.	34,900	$674,268

All Filings in WDC

Export CSV

42 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$3,603,658	5,642	+1017.2%	Shares	Sole	2026-08-12
2026-03-31	$513,931	1,900	-96.7%	Put	Sole	2026-05-14
2026-03-31	$136,597	505	-99.3%	Shares	Sole	2026-05-14
2025-12-31	$9,957,206	57,800	-74.5%	Put	Sole	2026-02-11
2025-12-31	$12,228,069	70,982	-57.5%	Shares	Sole	2026-02-11
2025-09-30	$27,181,584	226,400	-49.0%	Put	Sole	2025-11-13
2025-09-30	$20,074,272	167,202	+162.9%	Shares	Sole	2025-11-13
2025-06-30	$28,405,161	443,900	-22.8%	Put	Sole	2025-07-28
2025-06-30	$4,069,700	63,599	-73.5%	Shares	Sole	2025-07-28
2025-03-31	$9,712,296	240,225	+313.7%	Shares	Sole	2025-05-15
2025-03-31	$23,239,164	574,800	+86.1%	Put	Sole	2025-05-15
2024-12-31	$18,413,741	308,800	+398.9%	Put	Sole	2025-02-10
2024-12-31	$1,973,752	33,100	+33000.0%	Call	Sole	2025-02-10
2024-12-31	$3,462,355	58,064	-45.7%	Shares	Sole	2025-02-10
2024-09-30	$4,227,148	61,900	+7.5%	Put	Sole	2024-11-13
2024-09-30	$7,306,751	106,996	+89.1%	Shares	Sole	2024-11-13
2024-06-30	$4,364,355	57,600	+26.9%	Put	Sole	2024-08-13
2024-06-30	$4,287,979	56,592	-47.8%	Shares	Sole	2024-08-13
2024-03-31	$3,098,093	45,400	-88.2%	Put	Sole	2024-05-09
2024-03-31	$7,396,868	108,395	-13.9%	Shares	Sole	2024-05-09
2024-03-31	$6,823	100	-99.9%	Call	Sole	2024-05-09
2023-09-30	$5,747,372	125,956	+110.6%	Shares	Sole	2023-11-14
2022-06-30	$2,680,967	59,803	-83.8%	Shares	Sole	2022-08-11
2022-03-31	$18,299,230	368,565	+93.4%	Shares	Sole	2022-05-11
2022-03-31	$19,105,297	384,800	+3.9%	Put	Sole	2022-05-11
2021-12-31	$24,147,266	370,300	+7.4%	Put	Sole	2022-02-10
2021-12-31	$12,427,788	190,581	+21.7%	Shares	Sole	2022-02-10
2021-09-30	$19,454,858	344,700	-43.5%	Put	Sole	2021-11-12
2021-09-30	$8,838,217	156,595	+4.7%	Shares	Sole	2021-11-12
2021-06-30	$10,644,539	149,565	-24.2%	Shares	Sole	2021-08-12
2021-06-30	$43,442,162	610,400	+159.0%	Put	Sole	2021-08-12
2021-03-31	$13,174,243	197,367	-15.8%	Shares	Sole	2021-05-17
2021-03-31	$15,732,970	235,700	-53.2%	Put	Sole	2021-05-17
2020-12-31	$12,977,720	234,297	+64.7%	Shares	Sole	2021-02-12
2020-12-31	$27,866,729	503,100	-39.1%	Put	Sole	2021-02-12
2020-09-30	$5,199,419	142,255	+62.3%	Shares	Sole	2020-11-13
2020-09-30	$30,175,673	825,600	+1772.1%	Put	Sole	2020-11-13
2020-06-30	$3,869,038	87,634	+11.5%	Shares	Sole	2020-08-12
2020-06-30	$1,947,013	44,100	-86.3%	Put	Sole	2020-08-12
2020-03-31	$4,923,645	118,300	—	Call	Sole	2020-05-13
2020-03-31	$3,269,916	78,566	—	Shares	Sole	2020-05-13
2020-03-31	$13,414,123	322,300	—	Put	Sole	2020-05-13
No filing history on record for this holder in this stock.