形式因素公司
US ˙ NasdaqGS ˙ US3463751087

SecurityFORM / FormFactor, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership835,307 shares
Latest Disclosed Value $ 81,016,427
Northern Trust Corp reports 1.32% increase in ownership of FORM / FormFactor, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 835,307 shares of FormFactor, Inc. (US:FORM) valued at $81,016,426 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 824,386 shares of FormFactor, Inc.. This represents a change in shares of 1.32% during the quarter. The current value of the position is $105,754,043 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)
2026-05-14 2026-03-31 13F FORMFACTOR COM 346375108 835,307 10,921 1.32 81,016 76.18 0.0107
2026-02-17 2025-12-31 13F FORMFACTOR COM 346375108 824,386 -41,506 -4.79 45,984 45.82 0.0059
2025-11-14 2025-09-30 13F FORMFACTOR COM 346375108 865,892 -11,135 -1.27 31,536 4.50 0.0040
2025-08-13 2025-06-30 13F FORMFACTOR COM 346375108 877,027 16,395 1.90 30,178 23.95 0.0042
2025-05-13 2025-03-31 13F FORMFACTOR COM 346375108 860,632 -27,245 -3.07 24,347 -37.68 0.0036
2025-02-14 2024-12-31 13F FORMFACTOR COM 346375108 887,877 79,919 9.89 39,067 5.11 0.0055
2024-11-13 2024-09-30 13F FORMFACTOR COM 346375108 807,958 3,479 0.43 37,166 -23.68 0.0061
2024-08-14 2024-06-30 13F FORMFACTOR COM 346375108 804,479 -31,765 -3.80 48,695 27.62 0.0082
2024-05-14 2024-03-31 13F FORMFACTOR COM 346375108 836,244 -21,583 -2.52 38,158 6.65 0.0066
2024-02-13 2023-12-31 13F FORMFACTOR COM 346375108 857,827 -19,769 -2.25 35,780 16.68 0.0065
2023-11-13 2023-09-30 13F FORMFACTOR COM 346375108 877,596 1,475 0.17 30,663 2.28 0.0059
2023-08-11 2023-06-30 13F FORMFACTOR COM 346375108 876,121 1,737 0.20 29,981 7.65 0.0058
2023-05-15 2023-03-31 13F FORMFACTOR COM 346375108 874,384 25,000 2.94 27,849 47.50 0.0055
2023-02-13 2022-12-31 13F FORMFACTOR COM 346375108 849,384 19,049 2.29 18,882 -9.23 0.0040
2022-11-14 2022-09-30 13F FORMFACTOR COM 346375108 830,335 -14,937 -1.77 20,800 -36.46 0.0048
2022-08-12 2022-06-30 13F FORMFACTOR COM 346375108 845,272 -14,536 -1.69 32,737 -9.41 0.0070
2022-05-13 2022-03-31 13F FORMFACTOR COM 346375108 859,808 -20,594 -2.34 36,139 -10.22 0.0064
2022-02-08 2021-12-31 13F FORMFACTOR COM 346375108 880,402 -16,825 -1.88 40,253 20.18 0.0066
2021-11-15 2021-09-30 13F FORMFACTOR COM 346375108 897,227 -25,479 -2.76 33,493 -0.44 0.0059
2021-08-13 2021-06-30 13F FORMFACTOR COM 346375108 922,706 -36,038 -3.76 33,641 -22.21 0.0059
2021-05-12 2021-03-31 13F FORMFACTOR COM 346375108 958,744 -30,315 -3.07 43,248 1.65 0.0080
2021-02-11 2020-12-31 13F FORMFACTOR COM 346375108 989,059 -28,773 -2.83 42,548 67.68 0.0083
2020-11-16 2020-09-30 13F FORMFACTOR COM 346375108 1,017,832 -51,565 -4.82 25,375 -19.10 0.0056
2020-08-14 2020-06-30 13F FORMFACTOR COM 346375108 1,069,397 -162,651 -13.20 31,365 26.72 0.0074
2020-05-14 2020-03-31 13F FORMFACTOR COM 346375108 1,232,048 6,603 0.54 24,752 -22.22 0.0071
2020-02-14 2019-12-31 13F FORMFACTOR COM 346375108 1,225,445 -54,944 -4.29 31,824 33.30 0.0071
2019-11-13 2019-09-30 13F FORMFACTOR COM 346375108 1,280,389 67,887 5.60 23,874 25.66 0.0057
2019-08-13 2019-06-30 13F FORMFACTOR COM 346375108 1,212,502 26,459 2.23 18,999 -0.44 0.0045
2019-05-13 2019-03-31 13F FORMFACTOR COM 346375108 1,186,043 17,162 1.47 19,083 15.87 0.0047
2019-02-12 2018-12-31 13F FORMFACTOR COM 346375108 1,168,881 1,616 0.14 16,470 2.62 0.0046
2018-11-14 2018-09-30 13F FORMFACTOR COM 346375108 1,167,265 7,971 0.69 16,049 4.09 0.0039
2018-09-18 2018-06-30 13F/A-1 FORMFACTOR COM 346375108 1,159,294 57,730 5.24 15,419 2.54 0.0039
2018-08-14 2018-06-30 13F FORMFACTOR COM 346375108 1,164,035 62,471 15,482
2018-05-09 2018-03-31 13F FORMFACTOR COM 346375108 1,101,564 7,144 0.65 15,037 -12.21 0.0039
2018-02-14 2017-12-31 13F FORMFACTOR COM 346375108 1,094,420 -17,547 -1.58 17,128 -8.59 0.0043
2017-11-13 2017-09-30 13F FORMFACTOR COM 346375108 1,111,967 -11,480 -1.02 18,737 34.50 0.0049
2017-08-11 2017-06-30 13F FORMFACTOR COM 346375108 1,123,447 74,015 7.05 13,931 12.02 0.0039
2017-05-12 2017-03-31 13F FORMFACTOR COM 346375108 1,049,432 93,853 9.82 12,436 16.21 0.0036
2017-02-13 2016-12-31 13F FORMFACTOR COM 346375108 955,579 153,100 19.08 10,701 22.90 0.0033
2016-11-09 2016-09-30 13F FORMFACTOR COM 346375108 802,479 27,874 3.60 8,707 25.03 0.0027
2016-08-12 2016-06-30 13F FORMFACTOR COM 346375108 774,605 133,098 20.75 6,964 49.38 0.0023
2016-08-19 2016-03-31 13F/A-1 FORMFACTOR COM 346375108 641,507 4,086 0.64 4,662 -18.74 0.0015
2016-05-13 2016-03-31 13F Formfactor COMM 346375108 641,507 4,664
2016-02-12 2015-12-31 13F Formfactor COMM 346375108 637,421 -57,064 -8.22 5,737 21.83 0.0019
2015-11-12 2015-09-30 13F Formfactor COMM 346375108 694,485 114,672 19.78 4,709 -11.72 0.0016
2015-08-13 2015-06-30 13F FORMFACTOR COM 346375108 579,813 -15,595 -2.62 5,334 1.00 0.0036
2015-05-14 2015-03-31 13F FORMFACTOR COM 346375108 595,408 2,428 0.41 5,281 3.55 0.0016
2015-02-12 2014-12-31 13F FORMFACTOR COM 346375108 592,980 -30,181 -4.84 5,100 14.15 0.0015
2014-11-13 2014-09-30 13F FORMFACTOR COM 346375108 623,161 -12,900 -2.03 4,468 -15.57 0.0014
2014-08-14 2014-06-30 13F FORMFACTOR COM 346375108 636,061 -69,732 -9.88 5,292 17.34 0.0016
2014-05-14 2014-03-31 13F FORMFACTOR COM 346375108 705,793 -62,867 -8.18 4,510 -2.36 0.0014
2014-02-21 2013-12-31 13F/A-1 FORMFACTOR COM 346375108 768,660 14,477 1.92 4,619 -10.71 0.0015
2014-02-12 2013-12-31 13F FORMFACTOR COM 346375108 768,660 4,619
2013-11-13 2013-09-30 13F FORMFACTOR COM 346375108 754,183 30,525 4.22 5,173 5.90 0.0018
2013-08-09 2013-06-30 13F FORMFACTOR COM 346375108 723,658 723,658 4,885 0.0018
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.