Peter M. Ziemba is CAO at WisdomTree Investments, Inc. (WETF). They have made 17 open-market trades across 2 companies since 2012, most recently 2026-05-19.
CIK 0001064674
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.
2 open-market purchases totalling $307K since 2019, against 15 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WT | 885,686 | $18.9M |
| WETF | 1,015,612 | $5.3M |
| Total | $24.3M |
Shares reported on the most recent Form 4, priced at the 2026-05-20 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WT | SELL | 2026-05-19 | 2026-05-20 | $19.31 | $1.9M | -0.1% | -1.6% | +20.7% |
| WT | SELL | 2024-11-15 | 2024-11-18 | $11.43 | $1.1M | +4.4% | -7.4% | -17.6% |
| WT | SELL | 2023-08-16 | 2023-08-18 | $6.98 | $698K | +1.3% | -0.4% | -8.1% |
| WETF | SELL | 2021-11-17 | 2021-11-18 | $6.76 | $34K | -9.4% | -11.5% | -11.5% |
| WETF | BUY | 2020-02-03 | 2020-02-04 | $4.19 | $210K | +9.8% | -9.8% | -31.3% |
| WETF | BUY | 2019-02-04 | 2019-02-04 | $6.07 | $97K | +9.7% | +25.0% | +21.3% |
| WETF | SELL | 2015-08-05 | 2015-08-06 | $25.95 | $26K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2015-05-07 | 2015-05-08 | $19.39 | $3.8M | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2015-03-02 | 2015-03-03 | $19.20 | $960K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2014-08-22 | 2014-08-25 | $11.05 | $552K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2013-06-14 | 2013-06-17 | $12.05 | $603K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2013-03-12 | 2013-03-13 | $9.61 | $15K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2013-02-11 | 2013-02-13 | $9.59 | $24K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2012-08-20 | 2012-09-05 | $6.73 | $673K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2012-08-16 | 2012-08-16 | $6.61 | $66K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2012-08-13 | 2012-08-15 | $6.61 | $595K | -24.3% | +0.4% | +0.4% |
| WETF | SELL | 2012-02-02 | 2012-02-06 | $5.33 | $1.1M | -24.3% | +0.4% | +0.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.