JANE STREET GROUP, LLC

Position in FORM — Formfactor Inc

CIK 1595888 NEW YORK, NY

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Position in FORM

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$209,487,988

+$119,712,397 QoQ

Shares Held

1,309,873

+41.5% QoQ

Ownership

1.68%

of shares outstanding

% of Portfolio

0.15%

of 13F equity value

Holder Rank

#14

of 508 holders

Holding Since

Jun 2020

23 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Common Shares in FORM Over Time

Shares Held

Position Value (USD)

Derivatives in FORM

reported options exposure · as of Jun 30, 2026

CallValue

$61,844,931

CallShares

386,700

PutValue

$54,248,256

PutShares

339,200

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 Semiconductor Equipment & Materials

Technology · as of Jun 30, 2026

JANE STREET GROUP, LLC holds $2,249,113,515 across 23 Semiconductor Equipment & Materials names. FORM ranks #6 (9.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	LRCX	Lam Research Corp	1,118,602	$484,723,803
2	Q	Qnity Electronics, Inc.	2,508,359	$409,640,108
3	AXTI	Axt Inc	3,527,115	$254,234,448
4	AMAT	Applied Materials Inc /De	348,550	$252,001,650
5	TER	Teradyne, Inc	518,639	$250,938,293
6	FORM	Formfactor Inc This page	1,309,873	$209,487,988
7	CAMT	Camtek Ltd	895,030	$145,997,293
8	AEHR	Aehr Test Systems	753,523	$72,383,418

All Filings in FORM

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40 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$209,487,988	1,309,873	+41.5%	Shares	Defined	2026-08-14
2026-06-30	$61,844,931	386,700	+444.6%	Call	Defined	2026-08-14
2026-06-30	$54,248,256	339,200	+2635.5%	Put	Defined	2026-08-14
2026-03-31	$1,202,676	12,400	+90.8%	Put	Defined	2026-05-12
2026-03-31	$6,886,290	71,000	+112.6%	Call	Defined	2026-05-12
2026-03-31	$89,775,591	925,617	+680.9%	Shares	Defined	2026-05-12
2025-12-31	$6,611,824	118,534	-14.7%	Shares	Defined	2026-02-12
2025-12-31	$1,863,052	33,400	-48.5%	Call	Defined	2026-02-12
2025-12-31	$362,570	6,500	-45.4%	Put	Defined	2026-02-12
2025-09-30	$433,398	11,900	+147.9%	Put	Defined	2025-11-14
2025-09-30	$5,060,886	138,959	-19.8%	Shares	Defined	2025-11-14
2025-09-30	$2,363,658	64,900	+227.8%	Call	Defined	2025-11-14
2025-06-30	$681,318	19,800	-29.5%	Call	Defined	2025-08-14
2025-06-30	$5,965,420	173,363	-17.1%	Shares	Defined	2025-08-14
2025-03-31	$794,949	28,100	-64.4%	Call	Defined	2025-05-19
2025-03-31	$5,916,117	209,124	+633.6%	Shares	Defined	2025-05-19
2024-12-31	$1,254,308	28,507	-82.5%	Shares	Defined	2025-02-14
2024-12-31	$3,476,000	79,000	+1336.4%	Call	Defined	2025-02-14
2024-09-30	$7,478,174	162,569	+14.5%	Shares	Defined	2024-11-15
2024-06-30	$8,591,082	141,931	+294.9%	Shares	Defined	2024-08-15
2024-03-31	$1,640,124	35,944	-36.0%	Shares	Defined	2024-05-16
2023-12-31	$2,342,599	56,164	+326.6%	Shares	Defined	2024-02-15
2023-09-30	$459,984	13,165	+12.0%	Shares	Defined	2023-11-15
2023-06-30	$402,358	11,758	-43.2%	Shares	Defined	2023-08-14
2023-03-31	$659,357	20,702	+0.5%	Shares	Defined	2023-05-16
2022-09-30	$515,829	20,592	+170.2%	Shares	Defined	2022-11-15
2022-06-30	$295,199	7,622	+16.1%	Shares	Defined	2022-08-16
2022-03-31	$201,744	4,800	-38.5%	Put	Defined	2022-05-17
2021-12-31	$251,460	5,500	-56.0%	Call	Defined	2022-02-15
2021-09-30	$466,625	12,500	+14.7%	Call	Defined	2021-11-16
2021-09-30	$245,108	6,566	-27.2%	Shares	Defined	2021-11-16
2021-06-30	$328,650	9,014	-54.4%	Shares	Defined	2021-08-16
2021-06-30	$397,414	10,900	-23.2%	Call	Defined	2021-08-16
2021-03-31	$891,508	19,763	+307.7%	Shares	Defined	2021-05-18
2021-03-31	$351,858	7,800	-1.3%	Put	Defined	2021-05-18
2021-03-31	$640,562	14,200	+42.0%	Call	Defined	2021-05-18
2020-12-31	$339,858	7,900	—	Put	Defined	2021-02-17
2020-12-31	$430,200	10,000	-70.1%	Call	Defined	2021-02-17
2020-12-31	$208,517	4,847	—	Shares	Defined	2021-02-17
2020-06-30	$982,555	33,500	—	Call	Defined	2020-08-17
No filing history on record for this holder in this stock.