Vanguard Group Inc ownership in FORM / FormFactor, Inc.

FormFactor, Inc.

US ˙ NasdaqGS ˙ US3463751087

Security	FORM / FormFactor, Inc.
Institution	Vanguard Group Inc
Latest Disclosed Ownership	0 shares
Ownership	0.00%

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of FormFactor, Inc. (US:FORM). This represents 0.0 percent ownership of the company. In their previous filing dated 2025-01-31 , Vanguard Group Inc had reported owning 10,581,258 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File Date	Effective Date	Form	Prev Shares	Latest Shares	ΔShares (Percent)	Ownership (Percent)	ΔOwnership (Percent)
2026-03-26	2026-03-26	13G/A	10,581,258	0	-100.00	0.00	-100.00
2025-01-31	2025-01-31	13G/A	9,468,123	10,581,258	11.76	13.66	12.34
2024-02-13	2024-02-13	13G/A	9,021,283	9,468,123	4.95	12.16	3.84
2023-02-09	2023-02-09	13G/A	8,709,102	9,021,283	3.58	11.71	5.12
2022-02-10	2022-02-10	13G/A	8,359,066	8,709,102	4.19	11.14	3.15
2021-02-10	2021-02-10	13G/A	7,949,127	8,359,066	5.16	10.80	2.86
2020-02-12	2020-02-12	13G/A	7,715,945	7,949,127	3.02	10.50	0.86
2019-02-11	2019-02-11	13G/A	7,311,214	7,715,945	5.54	10.41	4.00
2018-08-08	2018-08-08	13G/A	6,321,615	7,311,214	15.65	10.01	15.59
2018-02-09	2018-02-09	13G/A	5,477,441	6,321,615	15.41	8.66	11.89
2017-02-13	2017-02-13	13G/A	4,074,161	5,477,441	34.44	7.74	10.57
2016-02-10	2016-02-10	13G/A		4,074,161		7.00
2015-02-10	2015-02-10	13G/A		3,489,769		6.18
2014-02-11	2014-02-11	13G/A		3,107,490		5.69
2013-02-12	2013-02-12	13G/A		3,088,659		5.79
2012-02-10	2012-02-10	13G		2,723,223		5.39

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-01-29	2025-12-31	13F	FORMFACTOR	COM	346375108	10,221,530	-78,334	-0.76	570,157	51.99	0.0083
2025-11-07	2025-09-30	13F	FORMFACTOR	COM	346375108	10,299,864	8,969	0.09	375,121	5.93	0.0056
2025-08-11	2025-06-30	13F	FORMFACTOR	COM	346375108	10,290,895	-127,218	-1.22	354,110	20.15	0.0057
2025-05-09	2025-03-31	13F	FORMFACTOR	COM	346375108	10,418,113	-163,145	-1.54	294,728	-36.70	0.0053
2025-02-11	2024-12-31	13F	FORMFACTOR	COM	346375108	10,581,258	484,176	4.80	465,575	0.24	0.0081
2024-11-13	2024-09-30	13F	FORMFACTOR	COM	346375108	10,097,082	442,315	4.58	464,466	-20.52	0.0083
2024-08-13	2024-06-30	13F	FORMFACTOR	COM	346375108	9,654,767	32,283	0.34	584,403	33.10	0.0112
2024-05-10	2024-03-31	13F	FORMFACTOR	COM	346375108	9,622,484	154,361	1.63	439,074	11.18	0.0087
2024-03-11	2023-12-31	13F/A-1	FORMFACTOR	COM	346375108	9,468,123	-291,678	-2.99	394,915	15.81	0.0086
2024-02-14	2023-12-31	13F	FORMFACTOR	COM	346375108	9,468,123	-291,678		394,915		0.0075
2023-12-18	2023-09-30	13F/A-1	FORMFACTOR	COM	346375108	9,759,801	224,599	2.36	341,007	4.51	0.0084
2023-11-14	2023-09-30	13F	FORMFACTOR	COM	346375108	9,759,801	224,599		341,007		0.0084
2023-08-14	2023-06-30	13F	FORMFACTOR	COM	346375108	9,535,202	426,040	4.68	326,295	12.47	0.0077
2023-07-14	2023-03-31	13F/A-1	FORMFACTOR	COM	346375108	9,109,162	87,879	0.97	290,127	44.67	0.0074
2023-05-15	2023-03-31	13F	FORMFACTOR	COM	346375108	9,109,162	87,879		290,127		0.0015
2023-02-10	2022-12-31	13F	FORMFACTOR	COM	346375108	9,021,283	267,943	3.06	200,543	-8.54	0.0055
2022-11-14	2022-09-30	13F	FORMFACTOR	COM	346375108	8,753,340	45,713	0.52	219,270	-34.98	0.0064
2022-08-12	2022-06-30	13F	FORMFACTOR	COM	346375108	8,707,627	-67,238	-0.77	337,245	-8.56	0.0095
2022-05-13	2022-03-31	13F	FORMFACTOR	COM	346375108	8,774,865	65,763	0.76	368,808	-7.38	0.0087
2022-02-14	2021-12-31	13F	FORMFACTOR	COM	346375108	8,709,102	95,155	1.10	398,179	23.83	0.0090
2021-11-12	2021-09-30	13F	FORMFACTOR	COM	346375108	8,613,947	-10,681	-0.12	321,558	2.26	0.0080
2021-08-13	2021-06-30	13F	FORMFACTOR	COM	346375108	8,624,628	27,584	0.32	314,454	-18.92	0.0078
2021-05-14	2021-03-31	13F	FORMFACTOR	COM	346375108	8,597,044	237,978	2.85	387,813	7.84	0.0105
2021-02-12	2020-12-31	13F	FORMFACTOR	COM	346375108	8,359,066	132,628	1.61	359,608	75.35	0.0104
2020-11-16	2020-09-30	13F	FORMFACTOR	COM	346375108	8,226,438	-120,623	-1.45	205,085	-16.23	0.0068
2020-08-14	2020-06-30	13F	FORMFACTOR	COM	346375108	8,347,061	181,245	2.22	244,819	49.23	0.0087
2020-05-15	2020-03-31	13F	FORMFACTOR	COM	346375108	8,165,816	216,689	2.73	164,050	-20.53	0.0070
2020-02-14	2019-12-31	13F	FORMFACTOR	COM	346375108	7,949,127	153,223	1.97	206,439	42.02	0.0070
2019-11-14	2019-09-30	13F	FORMFACTOR	COM	346375108	7,795,904	126,901	1.65	145,354	20.95	0.0054
2019-08-14	2019-06-30	13F	FORMFACTOR	COM	346375108	7,669,003	-240,035	-3.03	120,174	-5.57	0.0045
2019-05-15	2019-03-31	13F	FORMFACTOR	COM	346375108	7,909,038	193,093	2.50	127,257	17.05	0.0050
2019-02-14	2018-12-31	13F	FORMFACTOR	COM	346375108	7,715,945	243,079	3.25	108,718	5.81	0.0049
2018-12-13	2018-09-30	13F/A-2	FORMFACTOR	COM	346375108	7,472,866	600,660	8.74	102,751	12.42	0.0040
2018-11-23	2018-09-30	13F/A-1	FORMFACTOR	COM	346375108	7,472,866	0		102,751		0.0040
2018-11-14	2018-09-30	13F	FORMFACTOR	COM	346375108	7,472,866	600,660		102,751
2018-08-14	2018-06-30	13F	FORMFACTOR	COM	346375108	6,872,206	-93,534	-1.34	91,401	-3.87	0.0038
2018-05-15	2018-03-31	13F	FORMFACTOR	COM	346375108	6,965,740	644,125	10.19	95,083	-3.89	0.0042
2018-02-14	2017-12-31	13F	FORMFACTOR	COM	346375108	6,321,615	306,117	5.09	98,933	-2.40	0.0043
2017-11-14	2017-09-30	13F	FORMFACTOR	COM	346375108	6,015,498	44,097	0.74	101,362	36.89	0.0047
2017-08-24	2017-06-30	13F/A-1	FORMFACTOR	COM	346375108	5,971,401	253,323	4.43	74,045	9.28	0.0036
2017-08-11	2017-06-30	13F	FORMFACTOR	COM	346375108	5,971,401	253,323		74,045
2017-05-12	2017-03-31	13F	FORMFACTOR	COM	346375108	5,718,078	240,637	4.39	67,759	10.45	0.0035
2017-02-14	2016-12-31	13F	FORMFACTOR	COM	346375108	5,477,441	203,985	3.87	61,348	7.22	0.0034
2016-11-14	2016-09-30	13F	FORMFACTOR	COM	346375108	5,273,456	277,838	5.56	57,217	27.40	0.0034
2016-08-10	2016-06-30	13F	FORMFACTOR	COM	346375108	4,995,618	803,484	19.17	44,911	47.36	0.0028
2016-05-13	2016-03-31	13F	FORMFACTOR	COM	346375108	4,192,134	117,973	2.90	30,477	-16.88	0.0020
2016-02-08	2015-12-31	13F	FORMFACTOR	COM	346375108	4,074,161	134,923	3.43	36,668	37.29	0.0025
2015-11-12	2015-09-30	13F/A-1	FORMFACTOR	COM	346375108	3,939,238	49,872	1.28	26,708	-25.36	0.0011
2015-11-12	2015-09-30	13F/A-1	FORMFACTOR	COM	346375108	3,947,838	58,472		26,766		0.0011
2015-11-12	2015-09-30	13F	FORMFACTOR	COM	346375108	10,385,330			238,362
2015-08-13	2015-06-30	13F	FORMFACTOR	COM	346375108	3,889,366	234,371	6.41	35,782	10.37	0.0024
2015-05-15	2015-03-31	13F/A-1	FORMFACTOR	COM	346375108	3,654,995	165,226	4.73	32,420	8.02	0.0022
2015-05-14	2015-03-31	13F	FORMFACTOR	COM	346375108	3,654,995			32,420
2015-02-12	2014-12-31	13F	FORMFACTOR	COM	346375108	3,489,769	58,394	1.70	30,012	21.99	0.0022
2014-11-12	2014-09-30	13F	FORMFACTOR	COM	346375108	3,431,375	64,050	1.90	24,602	-12.19	0.0019
2014-08-11	2014-06-30	13F	FORMFACTOR	COM	346375108	3,367,325	90,514	2.76	28,016	33.80	0.0022
2014-05-13	2014-03-31	13F	FORMFACTOR	COM	346375108	3,276,811	169,321	5.45	20,938	11.92	0.0018
2014-02-12	2013-12-31	13F	FORMFACTOR	COM	346375108	3,107,490	105,850	3.53	18,708	-9.14	0.0016
2013-11-07	2013-09-30	13F	FORMFACTOR	COM	346375108	3,001,640	80,764	2.77	20,591	4.44	0.0020
2013-08-13	2013-06-30	13F	FORMFACTOR	COM	346375108	2,920,876	2,920,876		19,715		0.0021

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.