William E. Siwek is CEO & President at TPI COMPOSITES, INC (TPIC). They have made 9 open-market trades across 1 company since 2016, most recently 2025-03-21.
CIK 0001645109
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.
7 open-market purchases totalling $360K since 2016, against 2 sales. Across 7 scored buys the stock is down 9.4% at ninety days, and 12.5 points behind the S&P over the same stretch.
7 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| TPIC | 272,137 | $35K |
Shares reported on the most recent Form 4, priced at the 2025-03-25 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 57% | 57% | 29% |
| Avg Move | -0.3% | -3.8% | -9.4% |
| Alpha | -2.3% | -6.2% | -12.5% |
| Scored | 7 | 7 | 7 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TPIC | BUY | 2024-11-13 | 2024-11-14 | $2.19 | $22K | -12.7% | -40.6% | -46.1% |
| TPIC | BUY | 2023-08-18 | 2023-08-18 | $4.90 | $49K | +3.5% | -35.9% | -48.9% |
| TPIC | BUY | 2021-12-15 | 2021-12-15 | $14.68 | $20K | -8.6% | -19.5% | -19.7% |
| TPIC | SELL | 2021-05-18 | 2021-05-18 | $44.41 | $189K | +12.7% | +8.1% | -9.9% |
| TPIC | SELL | 2021-03-15 | 2021-03-17 | $52.30 | $182K | -5.0% | -3.3% | -14.1% |
| TPIC | BUY | 2020-05-12 | 2020-05-12 | $19.35 | $50K | +13.5% | +13.4% | +69.7% |
| TPIC | BUY | 2019-08-26 | 2019-08-26 | $17.73 | $100K | -5.7% | +7.8% | -1.1% |
| TPIC | BUY | 2019-06-05 | 2019-06-05 | $22.03 | $20K | +7.4% | +11.1% | -22.2% |
| TPIC | BUY | 2016-07-27 | 2016-07-29 | $11.00 | $100K | +0.7% | +36.8% | +2.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.