Formfactor, Inc.
A maker of advanced probe cards and test systems that let chipmakers check silicon wafers for defects before they are cut into individual chips. Its MicroSpring technology, built from tiny MEMS contacts, can test everything from phone processors to high-bandwidth memory, and its systems even reach into cryogenic labs and quantum computing. Founded in 1993 by former IBM researcher Igor Khandros in a small New York lab, the company got its start with a springy wire interconnect and moved to Livermore, California, two years later.
Granted 17.0K · Sold 911.4K
Granted 1.87M · Sold 903.0K
Granted 508.5K · Sold 259.4K
Granted 20.0K · Sold 20.0K
Granted 248.5K · Sold 197.4K
Granted 53.7K · Bought 4.0K · Sold 22.6K
Granted 100.0K · Sold 62.9K
Granted 330.2K · Sold 103.4K
Granted 26.2K · Sold 25.0K
Granted 90.0K · Sold 48.1K
Granted 62.0K · Bought 4.0K · Sold 40.0K
Sold 66.0K
Granted 1.29M · Bought 5.0K · Sold 1.26M
Granted 80.4K · Sold 58.7K
Granted 259.5K · Sold 234.5K
Granted 97.1K · Sold 77.0K
Granted 20.0K
Granted 12.0K
Granted 22.8K · Sold 12.8K
Granted 6.9K · Sold 3.5K
Granted 17.0K · Sold 5.0K
Granted 18.5K · Sold 14.3K
Granted 11.1K · Sold 3.0K
Granted 35.4K · Sold 32.3K
Granted 113.7K · Sold 99.7K
Granted 33.4K · Sold 32.8K
Granted 54.3K · Sold 54.3K
Granted 24.0K · Sold 20.4K
Granted 10.0K · Sold 4.2K
Granted 19.8K · Sold 19.8K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Khandros Igor YCEO, Director · 107 transactions | — | 2.99Mas of Apr 2008 | 17.0K | — | 911.4K |
| Slessor MikeCEO, Director · 250 transactions | — | 445.6K | 1.87M | — | 903.0K |
| Ludwig Michael MSR VP, CFO · 66 transactions | — | 240.4Kas of Feb 2018 | 508.5K | — | 259.4K |
| Hatsukano YoshikazuSr. VP & President, FFI KK · 4 transactions | — | 119.3Kas of Feb 2006 | 20.0K | — | 20.0K |
| Merkadeau Stuart LSR VP GENERAL COUNSEL · 113 transactions | — | 78.6Kas of May 2015 | 248.5K | — | 197.4K |
| Link Raymond ADirector · 16 transactions | — | 66.2Kas of May 2023 | 53.7K | 4.0K | 22.6K |
| Everett G Carl JrDirector · 25 transactions | — | 62.9Kas of May 2013 | 100.0K | — | 62.9K |
| Shahar ShaiCFO, SVP Global Finance · 79 transactions | — | 57.6Kas of Aug 2025 | 330.2K | — | 103.4K |
| Bronson Joseph RPresident, Director · 5 transactions | — | 42.9Kas of Jan 2007 | 26.2K | — | 25.0K |
| Zellner Michael WDirector · 16 transactions | — | 41.9Kas of Dec 2019 | 90.0K | — | 48.1K |
| Prestridge James ADirector · 11 transactions | — | 39.7Kas of Aug 2011 | 62.0K | 4.0K | 40.0K |
| Eldridge Benjamin NSr. VP of Development & CTO · 6 transactions | — | 36.7Kas of Feb 2006 | — | — | 66.0K |
| St Dennis ThomasDirector · 101 transactions | — | 28.3K | 1.29M | 5.0K | 1.26M |
| Steven-Waiss KelleyDirector · 27 transactions | — | 25.2K | 80.4K | — | 58.7K |
| DeLateur RichardDirector · 29 transactions | — | 25.0Kas of Jul 2019 | 259.5K | — | 234.5K |
| Rogas Edward JrDirector · 20 transactions | — | 22.1Kas of May 2021 | 97.1K | — | 77.0K |
| Ruscev MarioCEO, Director · 4 transactions | — | 16.2Kas of Feb 2010 | 20.0K | — | — |
| Bahrami HomaDirector · 2 transactions | — | 15.0Kas of Jun 2010 | 12.0K | — | — |
| Titinger JorgeDirector · 8 transactions | — | 14.8K | 22.8K | — | 12.8K |
| McKinnis Aric BrendanCFO, SVP Global Finance · 19 transactions | — | 13.1K | 6.9K | — | 3.5K |
| Wagner Harvey ADirector · 14 transactions | — | 12.0Kas of Jun 2010 | 17.0K | — | 5.0K |
| White Brian CDirector · 8 transactions | — | 8.7K | 18.5K | — | 14.3K |
| Brewer Kevin JDirector · 4 transactions | — | 8.1K | 11.1K | — | 3.0K |
| Obregon-Jimenez RebecaDirector · 14 transactions | — | 7.9K | 35.4K | — | 32.3K |
| Maier LotharDirector · 17 transactions | — | 6.8Kas of May 2024 | 113.7K | — | 99.7K |
| Rhodes SheriDirector · 12 transactions | — | 5.4K | 33.4K | — | 32.8K |
| Mathews Peter BSr VP of Worldwide Sales · 10 transactions | — | 5.2Kas of Feb 2006 | 54.3K | — | 54.3K |
| Campbell Thomas JDirector · 16 transactions | — | 4.4Kas of Jun 2009 | 24.0K | — | 20.4K |
| Vernet Jean BSR VP, CFO · 8 transactions | — | 3.1Kas of Apr 2010 | 10.0K | — | 4.2K |
| Foster Ronald CSr. VP & CFO · 16 transactions | — | 2.9Kas of Jun 2007 | 19.8K | — | 19.8K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: -4.58M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.