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JANE STREET GROUP, LLC

Position in FORM — Formfactor Inc

CIK 1595888 NEW YORK, NY

Position in FORM

as of Mar 31, 2026 · filed May 12, 2026
Position Value
$89,775,591
+$83,163,767 QoQ
Shares Held
925,617
+680.9% QoQ
Ownership
1.19%
of shares outstanding
% of Portfolio
0.12%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Jun 2020
22 quarters on record
Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in FORM Over Time

Shares Held

Position Value (USD)

Derivatives in FORM

reported options exposure · as of Mar 31, 2026
CallValue
$6,886,290
CallShares
71,000
PutValue
$1,202,676
PutShares
12,400

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 Mar 31, 2026

JANE STREET GROUP, LLC holds $1,638,407,095 across 21 Semiconductor Equipment & Materials names. FORM ranks #8 (5.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
8 FORM
Formfactor Inc
This page
925,617 $89,775,591

All Filings in FORM

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37 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $1,202,676 12,400
2026-03-31 $6,886,290 71,000
2026-03-31 $89,775,591 925,617
2025-12-31 $6,611,824 118,534
2025-12-31 $1,863,052 33,400
2025-12-31 $362,570 6,500
2025-09-30 $433,398 11,900
2025-09-30 $5,060,886 138,959
2025-09-30 $2,363,658 64,900
2025-06-30 $681,318 19,800
2025-06-30 $5,965,420 173,363
2025-03-31 $794,949 28,100
2025-03-31 $5,916,117 209,124
2024-12-31 $1,254,308 28,507
2024-12-31 $3,476,000 79,000
2024-09-30 $7,478,174 162,569
2024-06-30 $8,591,082 141,931
2024-03-31 $1,640,124 35,944
2023-12-31 $2,342,599 56,164
2023-09-30 $459,984 13,165
2023-06-30 $402,358 11,758
2023-03-31 $659,357 20,702
2022-09-30 $515,829 20,592
2022-06-30 $295,199 7,622
2022-03-31 $201,744 4,800
2021-12-31 $251,460 5,500
2021-09-30 $466,625 12,500
2021-09-30 $245,108 6,566
2021-06-30 $328,650 9,014
2021-06-30 $397,414 10,900
2021-03-31 $891,508 19,763
2021-03-31 $351,858 7,800
2021-03-31 $640,562 14,200
2020-12-31 $339,858 7,900
2020-12-31 $430,200 10,000
2020-12-31 $208,517 4,847
2020-06-30 $982,555 33,500