FormFactor, Inc.
US ˙ NasdaqGS ˙ US3463751087

SecurityFORM / FormFactor, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership14,486 shares
Latest Disclosed Value $ 1,404,997
Engineers Gate Manager LP ownership in FORM / FormFactor, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 14,486 shares of FormFactor, Inc. (US:FORM) valued at $1,404,997 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of FormFactor, Inc.. The current value of the position is $1,825,526 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F FORMFACTOR COM 346375108 14,486 14,486 1,405 0.0176
2026-02-17 2025-12-31 13F FORMFACTOR COM 346375108 0 -56,713 -100.00 0 -100.00
2025-11-14 2025-09-30 13F FORMFACTOR COM 346375108 56,713 24,927 78.42 2,065 88.93 0.0236
2025-08-14 2025-06-30 13F FORMFACTOR COM 346375108 31,786 -24,408 -43.44 1,094 -31.21 0.0136
2025-05-15 2025-03-31 13F FORMFACTOR COM 346375108 56,194 56,194 1,590 0.0268
2025-02-14 2024-12-31 13F FORMFACTOR COM 346375108 0 -48,971 -100.00 0 -100.00
2024-11-14 2024-09-30 13F FORMFACTOR COM 346375108 48,971 48,971 2,253 0.0440
2024-08-14 2024-06-30 13F FORMFACTOR COM 346375108 0 -4,693 -100.00 0 -100.00
2024-05-15 2024-03-31 13F FORMFACTOR COM 346375108 4,693 4,693 214 0.0056
2023-11-14 2023-09-30 13F FORMFACTOR COM 346375108 0 -12,894 -100.00 0 -100.00
2023-08-14 2023-06-30 13F FORMFACTOR COM 346375108 12,894 -12,586 -49.40 441 -45.62 0.0167
2023-05-15 2023-03-31 13F FORMFACTOR COM 346375108 25,480 -49,772 -66.14 812 -51.50 0.0339
2023-02-14 2022-12-31 13F FORMFACTOR COM 346375108 75,252 32,266 75.06 1,673 55.25 0.1005
2022-11-14 2022-09-30 13F FORMFACTOR COM 346375108 42,986 42,986 1,077 0.0670
2022-02-14 2021-12-31 13F FORMFACTOR COM 346375108 0 -18,552 -100.00 0 -100.00
2021-11-15 2021-09-30 13F FORMFACTOR COM 346375108 18,552 -20,648 -52.67 693 -51.50 0.0395
2021-08-16 2021-06-30 13F FORMFACTOR COM 346375108 39,200 31,106 384.31 1,429 291.51 0.0919
2021-05-17 2021-03-31 13F FORMFACTOR COM 346375108 8,094 954 13.36 365 18.89 0.0181
2021-02-16 2020-12-31 13F FORMFACTOR COM 346375108 7,140 -9,490 -57.07 307 -26.02 0.0133
2020-11-16 2020-09-30 13F FORMFACTOR COM 346375108 16,630 -32,011 -65.81 415 -70.92 0.0195
2020-08-17 2020-06-30 13F FORMFACTOR COM 346375108 48,641 11,629 31.42 1,427 91.80 0.0726
2020-05-15 2020-03-31 13F FORMFACTOR COM 346375108 37,012 37,012 744 0.0536
2019-02-14 2018-12-31 13F FORMFACTOR COM 346375108 0 -18,000 -100.00 0 -100.00
2018-11-01 2018-09-30 13F FORMFACTOR COM 346375108 18,000 18,000 248 0.0191
2018-05-07 2018-03-31 13F FORMFACTOR COM 346375108 0 -63,952 -100.00 0 -100.00
2018-02-01 2017-12-31 13F FORMFACTOR COM 346375108 63,952 -12,568 -16.42 1,001 -22.34 0.0687
2017-11-13 2017-09-30 13F FORMFACTOR COM 346375108 76,520 76,520 1,289 0.1085
2016-08-11 2016-06-30 13F FORMFACTOR COM 346375108 0 -16,700 -100.00 0 -100.00
2016-05-09 2016-03-31 13F FORMFACTOR COM 346375108 16,700 16,700 0.00 121 0.0094
2016-02-05 2015-12-31 13F FORMFACTOR COM 346375108 0 0 0 0.0000
2015-08-14 2015-06-30 13F FORMFACTOR COM 346375108 0 -13,422 -100.00 0 -100.00
2015-05-15 2015-03-31 13F FORMFACTOR COM 346375108 13,422 581 4.52 119 8.18 0.0158
2015-02-17 2014-12-31 13F FORMFACTOR COM 346375108 12,841 12,841 110 0.0313
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.