폼팩터, Inc.
US ˙ NasdaqGS ˙ US3463751087

SecurityFORM / FormFactor, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership180,937 shares
Latest Disclosed Value $ 17,549,080
Millennium Management Llc reports 119.67% increase in ownership of FORM / FormFactor, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 180,937 shares of FormFactor, Inc. (US:FORM) valued at $17,549,080 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 82,369 shares of FormFactor, Inc.. This represents a change in shares of 119.67% during the quarter. The current value of the position is $22,907,529 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 180,937 98,568 119.67 17,549 282.00 0.0073
2026-02-17 2025-12-31 13F FORMFACTOR COM 346375108 82,369 -30,809 -27.22 4,595 11.48 0.0019
2025-11-14 2025-09-30 13F FORMFACTOR COM 346375108 113,178 88,429 357.30 4,122 384.25 0.0018
2025-08-14 2025-06-30 13F FORMFACTOR COM 346375108 24,749 5,012 25.39 852 52.51 0.0004
2025-05-15 2025-03-31 13F FORMFACTOR COM 346375108 19,737 19,737 558 0.0003
2025-02-14 2024-12-31 13F FORMFACTOR COM 346375108 0 -111,843 -100.00 0 -100.00
2024-11-14 2024-09-30 13F FORMFACTOR COM 346375108 111,843 -30,562 -21.46 5,145 -40.32 0.0024
2024-08-14 2024-06-30 13F FORMFACTOR COM 346375108 142,405 22,784 19.05 8,620 57.91 0.0040
2024-05-15 2024-03-31 13F FORMFACTOR COM 346375108 119,621 74,151 163.08 5,458 187.87 0.0023
2024-02-14 2023-12-31 13F FORMFACTOR COM 346375108 45,470 -10,937 -19.39 1,897 -3.76 0.0008
2023-11-14 2023-09-30 13F FORMFACTOR COM 346375108 56,407 -83,777 -59.76 1,971 -58.93 0.0010
2023-08-14 2023-06-30 13F FORMFACTOR COM 346375108 140,184 58,589 71.80 4,797 84.57 0.0024
2023-05-15 2023-03-31 13F FORMFACTOR COM 346375108 81,595 -55,434 -40.45 2,599 -14.67 0.0015
2023-02-14 2022-12-31 13F FORMFACTOR COM 346375108 137,029 -262,358 -65.69 3,046 -69.56 0.0017
2022-11-14 2022-09-30 13F FORMFACTOR COM 346375108 399,387 275,221 221.66 10,005 108.05 0.0059
2022-08-15 2022-06-30 13F FORMFACTOR COM 346375108 124,166 117,932 1,891.75 4,809 1,735.50 0.0030
2022-05-16 2022-03-31 13F FORMFACTOR COM 346375108 6,234 -87,277 -93.33 262 -93.87 0.0001
2022-02-14 2021-12-31 13F FORMFACTOR COM 346375108 93,511 2,983 3.30 4,275 26.52 0.0022
2021-11-15 2021-09-30 13F FORMFACTOR COM 346375108 90,528 -479,690 -84.12 3,379 -83.75 0.0020
2021-08-16 2021-06-30 13F FORMFACTOR COM 346375108 570,218 400,979 236.93 20,790 172.33 0.0128
2021-05-17 2021-03-31 13F FORMFACTOR COM 346375108 169,239 -15,706 -8.49 7,634 -4.05 0.0055
2021-02-16 2020-12-31 13F FORMFACTOR COM 346375108 184,945 19,752 11.96 7,956 93.20 0.0057
2020-11-16 2020-09-30 13F FORMFACTOR COM 346375108 165,193 126,724 329.42 4,118 265.07 0.0051
2020-08-14 2020-06-30 13F FORMFACTOR COM 346375108 38,469 -526,273 -93.19 1,128 -90.06 0.0015
2020-05-14 2020-03-31 13F FORMFACTOR COM 346375108 564,742 -12,307 -2.13 11,346 -24.29 0.0255
2020-02-14 2019-12-31 13F FORMFACTOR COM 346375108 577,049 556,611 2,723.41 14,986 3,833.33 0.0187
2019-11-14 2019-09-30 13F FORMFACTOR COM 346375108 20,438 -62,528 -75.37 381 -70.69 0.0006
2019-08-15 2019-06-30 13F/A-1 FORMFACTOR COM 346375108 82,966 82,966 1,300 0.0020
2019-08-14 2019-06-30 13F ATRECA CL A COM 346375108 26,064 26,064 491
2018-08-14 2018-06-30 13F FORMFACTOR COM 346375108 0 -16,591 -100.00 0 -100.00
2018-05-15 2018-03-31 13F FORMFACTOR COM 346375108 16,591 -917,945 -98.22 226 -98.45 0.0003
2018-02-14 2017-12-31 13F FORMFACTOR COM 346375108 934,536 -555,956 -37.30 14,625 -41.77 0.0202
2017-11-14 2017-09-30 13F FORMFACTOR COM 346375108 1,490,492 814,404 120.46 25,115 199.59 0.0383
2017-08-14 2017-06-30 13F FORMFACTOR COM 346375108 676,088 324,710 92.41 8,383 101.32 0.0150
2017-05-15 2017-03-31 13F FORMFACTOR COM 346375108 351,378 327,799 1,390.22 4,164 1,477.27 0.0076
2017-02-14 2016-12-31 13F FORMFACTOR COM 346375108 23,579 -38,400 -61.96 264 -60.71 0.0006
2016-11-14 2016-09-30 13F FORMFACTOR COM 346375108 61,979 7,378 13.51 672 36.86 0.0011
2016-08-15 2016-06-30 13F FORMFACTOR COM 346375108 54,601 -23,013 -29.65 491 -12.94 0.0011
2016-05-16 2016-03-31 13F FORMFACTOR COM 346375108 77,614 -46,617 -37.52 564 -49.55 0.0014
2016-02-16 2015-12-31 13F FORMFACTOR COM 346375108 124,231 88,189 244.68 1,118 358.20 0.0024
2015-11-16 2015-09-30 13F FORMFACTOR COM 346375108 36,042 36,042 0.00 244 0.0005
2015-08-14 2015-06-30 13F FORMFACTOR COM 346375108 0 -266,492 -100.00 0 -100.00
2015-05-15 2015-03-31 13F FORMFACTOR COM 346375108 266,492 -33,018 -11.02 2,364 -8.23 0.0044
2015-02-17 2014-12-31 13F FORMFACTOR COM 346375108 299,510 114,777 62.13 2,576 94.42 0.0055
2014-11-14 2014-09-30 13F FORMFACTOR COM 346375108 184,733 142,865 341.23 1,325 280.75 0.0034
2014-08-14 2014-06-30 13F FORMFACTOR COM 346375108 41,868 -6,012 -12.56 348 13.73 0.0010
2014-05-15 2014-03-31 13F FORMFACTOR COM 346375108 47,880 -18,109 -27.44 306 -22.92 0.0009
2014-02-14 2013-12-31 13F FORMFACTOR COM 346375108 65,989 12,955 24.43 397 9.07 0.0013
2013-11-14 2013-09-30 13F FORMFACTOR COM 346375108 53,034 17,758 50.34 364 52.94 0.0012
2013-08-14 2013-06-30 13F FORMFACTOR COM 346375108 35,276 35,276 238 0.0007
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.