Michael M. Ludwig is CFO & VP at FORMFACTOR INC (FORM). They have made 21 open-market trades across 1 company since 2012, most recently 2026-03-05.
CIK 0001256949
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 21 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| FORM | SELL | 2018-02-20 | 2018-02-22 | $13.05 | $587K | +5.8% | +10.9% | +4.7% |
| FORM | SELL | 2018-02-15 | 2018-02-16 | $12.73 | $382K | +1.6% | +17.1% | +3.5% |
| FORM | SELL | 2017-11-13 | 2017-11-14 | $17.50 | $590K | -2.7% | -12.1% | -26.8% |
| FORM | SELL | 2017-08-23 | 2017-08-24 | $14.07 | $141K | +5.6% | +11.1% | +15.6% |
| FORM | SELL | 2017-08-21 | 2017-08-22 | $14.21 | $426K | +7.4% | +11.3% | +19.4% |
| FORM | SELL | 2016-06-02 | 2016-06-02 | $7.33 | $27K | +6.8% | +18.6% | +40.8% |
| FORM | SELL | 2016-05-06 | 2016-05-09 | $6.81 | $78K | -7.5% | +8.4% | +52.7% |
| FORM | SELL | 2016-05-03 | 2016-05-03 | $7.14 | $350K | -1.3% | +4.8% | +33.3% |
| FORM | SELL | 2015-09-18 | 2018-02-12 | $7.60 | $487 | +2.8% | +21.8% | +6.9% |
| FORM | SELL | 2015-05-07 | 2015-05-08 | $8.28 | $66K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2015-05-06 | 2015-05-07 | $8.25 | $66K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2015-05-05 | 2018-02-12 | $8.20 | $6K | +2.8% | +21.8% | +6.9% |
| FORM | SELL | 2015-05-05 | 2015-05-06 | $8.43 | $271K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2015-03-02 | 2015-03-03 | $10.15 | $62K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2015-02-11 | 2015-02-12 | $8.52 | $32K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2014-05-07 | 2014-05-08 | $5.77 | $54K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2014-02-28 | 2014-02-28 | $7.11 | $44K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2014-02-11 | 2014-02-12 | $6.47 | $24K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2013-05-07 | 2013-05-08 | $5.14 | $16K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2013-02-12 | 2013-02-13 | $4.61 | $18K | -13.8% | -3.2% | -3.2% |
| FORM | SELL | 2012-05-07 | 2012-05-08 | $6.09 | $19K | -13.8% | -3.2% | -3.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.