FormFactor, Inc.
US ˙ NasdaqGS ˙ US3463751087

SecurityFORM / FormFactor, Inc.
InstitutionRoyce & Associates Lp
ManagerChuck Royce
Latest Disclosed Ownership451,863 shares
Latest Disclosed Value $ 43,826,192
Royce & Associates Lp reports 60.98% decrease in ownership of FORM / FormFactor, Inc.

On May 12, 2026 - Royce & Associates Lp filed a 13F-HR form disclosing ownership of 451,863 shares of FormFactor, Inc. (US:FORM) valued at $43,826,192 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 1,157,891 shares of FormFactor, Inc.. This represents a change in shares of -60.98% during the quarter. The current value of the position is $57,208,115 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)
2026-05-12 2026-03-31 13F FORMFACTOR COM 346375108 451,863 -706,028 -60.98 43,826 -32.14 0.4326
2026-02-09 2025-12-31 13F FORMFACTOR COM 346375108 1,157,891 -310,842 -21.16 64,587 20.74 0.6549
2025-11-12 2025-09-30 13F FORMFACTOR COM 346375108 1,468,733 -174,409 -10.61 53,491 -5.39 0.5333
2025-08-11 2025-06-30 13F FORMFACTOR COM 346375108 1,643,142 -226,914 -12.13 56,541 6.87 0.5803
2025-05-06 2025-03-31 13F FORMFACTOR COM 346375108 1,870,056 112,970 6.43 52,904 -31.57 0.5734
2025-02-10 2024-12-31 13F FORMFACTOR COM 346375108 1,757,086 406,768 30.12 77,312 24.47 0.7173
2024-11-06 2024-09-30 13F FORMFACTOR COM 346375108 1,350,318 -143,966 -9.63 62,115 -31.33 0.5646
2024-08-13 2024-06-30 13F FORMFACTOR COM 346375108 1,494,284 -585,573 -28.15 90,449 -4.69 0.8455
2024-05-13 2024-03-31 13F FORMFACTOR COM 346375108 2,079,857 -112,207 -5.12 94,904 3.80 0.8471
2024-02-12 2023-12-31 13F FORMFACTOR COM 346375108 2,192,064 -322,113 -12.81 91,431 4.08 0.8444
2023-11-09 2023-09-30 13F FORMFACTOR COM 346375108 2,514,177 48,107 1.95 87,845 4.10 0.8945
2023-08-07 2023-06-30 13F FORMFACTOR COM 346375108 2,466,070 103,672 4.39 84,389 12.16 0.8193
2023-05-23 2023-03-31 13F/A-1 FORMFACTOR COM 346375108 2,362,398 -342,005 -12.65 75,242 25.16 0.7531
2023-05-04 2023-03-31 13F FORMFACTOR COM 346375108 2,362,398 -342,005 75 0.7531
2023-05-23 2022-12-31 13F/A-1 FORMFACTOR COM 346375108 2,704,403 125,637 4.87 60,119 -6.94 0.6318
2023-02-13 2022-12-31 13F FORMFACTOR COM 346375108 2,704,403 125,637 60 0.6283
2022-11-03 2022-09-30 13F FORMFACTOR COM 346375108 2,578,766 283,871 12.37 64,598 -27.32 0.7305
2022-08-04 2022-06-30 13F FORMFACTOR COM 346375108 2,294,895 462,292 25.23 88,881 15.39 0.9150
2022-05-05 2022-03-31 13F FORMFACTOR COM 346375108 1,832,603 -106,010 -5.47 77,024 -13.10 0.6541
2022-02-07 2021-12-31 13F FORMFACTOR COM 346375108 1,938,613 59,458 3.16 88,633 26.35 0.6623
2021-11-10 2021-09-30 13F FORMFACTOR COM 346375108 1,879,155 467,178 33.09 70,149 36.26 0.5246
2021-08-06 2021-06-30 13F FORMFACTOR COM 346375108 1,411,977 804,757 132.53 51,481 87.94 0.3538
2021-05-10 2021-03-31 13F FORMFACTOR COM 346375108 607,220 44,000 7.81 27,392 13.05 0.1841
2021-02-08 2020-12-31 13F FORMFACTOR COM 346375108 563,220 -76,000 -11.89 24,230 52.05 0.2002
2020-11-12 2020-09-30 13F FORMFACTOR COM 346375108 639,220 -63,900 -9.09 15,936 -22.73 0.1720
2020-08-07 2020-06-30 13F FORMFACTOR COM 346375108 703,120 -76,300 -9.79 20,623 31.70 0.2272
2020-05-12 2020-03-31 13F FORMFACTOR COM 346375108 779,420 -199,007 -20.34 15,659 -38.37 0.2134
2020-02-06 2019-12-31 13F FORMFACTOR COM 346375108 978,427 -201,445 -17.07 25,410 15.51 0.2269
2019-11-13 2019-09-30 13F FORMFACTOR COM 346375108 1,179,872 -144,352 -10.90 21,999 6.01 0.2036
2019-08-12 2019-06-30 13F FORMFACTOR COM 346375108 1,324,224 -51,100 -3.72 20,751 -6.23 0.1876
2019-05-09 2019-03-31 13F FORMFACTOR COM 346375108 1,375,324 -45,159 -3.18 22,129 10.56 0.1870
2019-02-11 2018-12-31 13F FORMFACTOR COM 346375108 1,420,483 -42,235 -2.89 20,015 -0.48 0.1794
2018-11-13 2018-09-30 13F FORMFACTOR COM 346375108 1,462,718 110,800 8.20 20,112 11.85 0.1387
2018-08-09 2018-06-30 13F FORMFACTOR COM 346375108 1,351,918 274,688 25.50 17,981 22.29 0.1244
2018-05-14 2018-03-31 13F FORMFACTOR COM 346375108 1,077,230 267,392 33.02 14,704 16.02 0.1030
2018-02-09 2017-12-31 13F FORMFACTOR COM 346375108 809,838 -201,355 -19.91 12,674 -25.62 0.0844
2017-11-13 2017-09-30 13F FORMFACTOR COM 346375108 1,011,193 -193,252 -16.04 17,039 14.09 0.1129
2017-08-07 2017-06-30 13F FORMFACTOR COM 346375108 1,204,445 -442,600 -26.87 14,935 -23.48 0.0990
2017-05-11 2017-03-31 13F FORMFACTOR COM 346375108 1,647,045 26,000 1.60 19,517 7.50 0.1276
2017-02-10 2016-12-31 13F FORMFACTOR COM 346375108 1,621,045 194,486 13.63 18,156 17.30 0.1165
2016-11-14 2016-09-30 13F FORMFACTOR COM 346375108 1,426,559 7,500 0.53 15,478 21.33 0.1019
2016-08-08 2016-06-30 13F FORMFACTOR COM 346375108 1,419,059 204,852 16.87 12,757 44.52 0.0843
2016-05-11 2016-03-31 13F FORMFACTOR COM 346375108 1,214,207 289,147 31.26 8,827 6.02 0.0557
2016-02-09 2015-12-31 13F FORMFACTOR COM 346375108 925,060 -180,253 -16.31 8,326 11.10 0.0497
2015-11-12 2015-09-30 13F FORMFACTOR COM 346375108 1,105,313 -166,009 -13.06 7,494 -35.93 0.0397
2015-08-10 2015-06-30 13F FORMFACTOR COM 346375108 1,271,322 -164,198 -11.44 11,696 -8.14 0.0494
2015-05-13 2015-03-31 13F FORMFACTOR COM 346375108 1,435,520 -327,240 -18.56 12,733 -16.01 0.0482
2015-02-09 2014-12-31 13F FORMFACTOR COM 346375108 1,762,760 69,099 4.08 15,160 24.84 0.0526
2014-11-12 2014-09-30 13F FORMFACTOR COM 346375108 1,693,661 -28,500 -1.65 12,144 -15.24 0.0410
2014-08-11 2014-06-30 13F FORMFACTOR COM 346375108 1,722,161 -90,000 -4.97 14,328 23.73 0.0426
2014-05-12 2014-03-31 13F FORMFACTOR COM 346375108 1,812,161 6,500 0.36 11,580 6.53 0.0342
2014-02-10 2013-12-31 13F FORMFACTOR COM 346375108 1,805,661 133,500 7.98 10,870 -5.24 0.0311
2013-11-12 2013-09-30 13F FORMFACTOR COM 346375108 1,672,161 240,000 16.76 11,471 18.66 0.0341
2013-08-07 2013-06-30 13F FORMFACTOR COM 346375108 1,432,161 1,432,161 9,667 0.0299
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.