Power Solutions International, Inc.
A maker of emission-certified engines and integrated power systems, Power Solutions International builds the engines that power forklifts, construction machinery, agricultural equipment, and generators. Founded in 1985 by the Winemaster brothers, the company was long known as "The W Group" before renaming itself Power Solutions International in 2011. Its engines are famously "fuel-agnostic" — the same base design can run on natural gas, propane, gasoline, or diesel, letting customers pick the fuel that suits them.
Sold 1.15M
Sold 493.6K
Bought 227.8K
Granted 20.0K
Granted 25.0K · Sold 15.0K
Granted 120.2K · Sold 33.9K
Granted 25.0K · Sold 10.0K
Granted 7.9K
Granted 5.0K
Granted 22.5K · Bought 300 · Sold 8.0K
Granted 2.1K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Weichai America Corp. +2 co-filers10% owner · 97 transactions | +37.7% | 10.60M | — | — | 1.15M |
| Winemaster Gary Sformer 10% owner · 76 transactions | -35.5% | 2.18Mas of Apr 2025 | — | — | 493.6K |
| Gagnon Neil10% owner · 53 transactions | — | 2.10Mas of Oct 2024 | — | 227.8K | — |
| Landini Kenneth WDirector · 4 transactions | +51.3% | 59.0Kas of Dec 2024 | 20.0K | — | — |
| Simpkins Frank PDirector · 12 transactions | +50% | 30.0K | 25.0K | — | 15.0K |
| Xykis ConstantineCEO · 19 transactions | — | 26.8K | 120.2K | — | 33.9K |
| He HongDirector · 11 transactions | +171.4% | 23.8K | 25.0K | — | 10.0K |
| Mozzi FabrizioDirector · 2 transactions | — | 7.9Kas of Sep 2022 | 7.9K | — | — |
| Shea Courtney C.Director · 1 transaction | — | 5.0K | 5.0K | — | — |
| Li XunCFO · 9 transactions | — | 4.6K | 22.5K | 300 | 8.0K |
| Wu GuogangDirector · 1 transaction | +93.8% | 4.3Kas of Dec 2021 | 2.1K | — | — |
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 the last 5 years: -1.48M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.