Nasdaq · CIK 0001137091
PSIX POWER SOLUTIONS INTERNATIONAL, INC.
Insider trading from SEC Form 4. Last filing Aug 17, 2026. Close $50.07 on Oct 9, 2026, +97% from the 52-week low and -49% from the high.
In brief
POWER SOLUTIONS INTERNATIONAL, INC. (PSIX) has 44 SEC Form 4 filings on file from 9 insiders, the latest filed on Aug 17, 2026. No insider bought or sold on the open market in the last 90 days; rows filed in that time are grants, exercises, tax withholding and other transactions that carry no view on the price.
28 open-market trades have been scored at PSIX. The newest: Weichai America Corp. (10% owner) sold $7.5M of stock on Sep 11, 2025, filed Sep 15, 2025, scored 52 (moderate). The largest of the 28 shown: Weichai America Corp. (10% owner) sold $15M on Aug 13, 2025, scored 52 (moderate). 3 insiders sold within 14 days of each other around Sep 11, 2025.
19 Form 144 notices of planned sales are on file, the latest filed Sep 29, 2025.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
9
with a Form 4 at this company
Price and insider trades, last year
PSIXOct 9, 2026 · close 50.07
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at POWER SOLUTIONS INTERNATIONAL, INC., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 52Moderate | Weichai America Corp. owner sell | $7.5M 79,839 shares | -1% | +487% from low-5% from high | |
| 48Moderate | Hong He director sell | $236k 2,500 shares | -12% | +456% from low-10% from high | |
| 52Moderate | Weichai America Corp. owner sell | $3.4M 36,554 shares | -0% | +456% from low-10% from high | |
| 50Moderate | Hong He director sell | $366k 4,000 shares | -16% | +476% from low-7% from high | |
| 81Strong | Constantine Xykis CEO sell | $717k 7,854 shares | -100% | +476% from low-7% from high | |
| 39Weak | Hong He director sell | $89k 1,000 shares | -4% | +424% from low-15% from high | |
| 52Moderate | Weichai America Corp. owner sell | $7.8M 94,047 shares | -1% | +414% from low-17% from high | |
| 37Weak | Xun Li CFO buy | $28k 300 shares | +136% | +449% from low-11% from high | |
| 78Notable | Xun Li CFO sell | $739k 8,000 shares | -97% | +449% from low-11% from high | |
| 64Notable | Frank P Simpkins director sell | $916k 10,000 shares | -29% | +449% from low-11% from high | |
| 52Moderate | Weichai America Corp. owner sell | $4.7M 51,426 shares | -0% | +449% from low-11% from high | |
| 52Moderate | Weichai America Corp. owner sell | $7.7M 87,210 shares | -1% | +466% from low-8% from high | |
| 52Moderate | Weichai America Corp. owner sell | $3.5M 42,314 shares | -0% | +411% from low-17% from high | |
| 52Moderate | Weichai America Corp. owner sell | $1.3M 15,802 shares | -0% | +401% from low-19% from high | |
| 52Moderate | Weichai America Corp. owner sell | $6.5M 79,670 shares | -1% | +396% from low-20% from high | |
| 52Moderate | Weichai America Corp. owner sell | $11M 125,220 shares | -1% | +441% from low-13% from high | |
| 52Moderate | Weichai America Corp. owner sell | $9.7M 116,137 shares | -1% | +432% from low-14% from high | |
| 52Moderate | Weichai America Corp. owner sell | $12M 135,846 shares | -1% | +404% from low-19% from high | |
| 43Moderate | Hong He director sell | $225k 2,500 shares | -9% | +462% from low-9% from high | |
| 52Moderate | Weichai America Corp. owner sell | $15M 162,113 shares | -1% | +462% from low-9% from high | |
| 52Moderate | Frank P Simpkins director sell | $475k 5,000 shares | -13% | +492% from low-4% from high | |
| 85Strong | Constantine Xykis CEO sell | $2.5M 26,005 shares | -77% | +492% from low-4% from high | |
| 52Moderate | Weichai America Corp. owner sell | $12M 123,822 shares | -1% | +492% from low-4% from high | |
| 18Weak | Gary S Winemaster owner sell | $47k 2,000 shares | -0% | +42% from low-47% from high | |
| 37Weak | Gary S Winemaster owner sell | $1.6M 56,729 shares | -2% | - | |
| 34Weak | Gary S Winemaster owner sell | $791k 25,000 shares | -1% | - | |
| 22Weak | Gary S Winemaster owner sell | $95k 4,296 shares | -0% | - | |
| 22Weak | Gary S Winemaster owner sell | $124k 4,918 shares | -0% | - |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 29, 2025 | Landini Kenneth W Director | 3,500 0.02% of outstanding | $371k | Sep 29, 2025 | $1.2M |
| Sep 23, 2025 | Landini Kenneth W Director | 6,000 0.03% of outstanding | $600k | Sep 18, 2025 | $595k |
| Sep 11, 2025 | HONG HE Director | 1,500 0.01% of outstanding | $141k | Sep 11, 2025 | none |
| Sep 10, 2025 | HONG HE Director | 1,000 0.00% of outstanding | $95k | Sep 10, 2025 | $680k |
| Sep 9, 2025 | HONG HE Director | 4,000 0.02% of outstanding | $366k | Sep 9, 2025 | $314k |
| Sep 9, 2025 | Xykis Constantine Officer | 7,854 0.03% of outstanding | $663k | Sep 9, 2025 | $2.5M |
| Sep 8, 2025 | HONG HE Director | 1,000 0.00% of outstanding | $89k | Sep 8, 2025 | $225k |
| Sep 5, 2025 | Landini Kenneth W Director | 7,000 0.03% of outstanding | $595k | Sep 5, 2025 | none |
| Aug 25, 2025 | Xun Li Chief Financial Officer | 8,221 0.04% of outstanding | $750k | Aug 25, 2025 | none |
| Aug 25, 2025 | SIMPKINS FRANK P Director | 10,000 0.04% of outstanding | $913k | Aug 25, 2025 | $474k |
| Aug 13, 2025 | HONG HE Director | 2,500 0.01% of outstanding | $225k | Aug 13, 2025 | none |
| Aug 12, 2025 | Xykis Constantine Officer | 26,005 0.11% of outstanding | $2.5M | Aug 12, 2025 | none |
| Aug 12, 2025 | SIMPKINS FRANK P Director | 5,000 12.50% of outstanding | $474k | Aug 12, 2025 | none |
| Aug 8, 2025 | Weichai America Corp. 10% Stockholder | 1,150,000 4.99% of outstanding | $100M | Aug 12, 2025 | none |
| Apr 21, 2025 | Winemaster Gary S 10% Stockholder | 612,187 2.66% of outstanding | $15M | Apr 21, 2025 | $2.1M |
| Apr 11, 2025 | Gary S. Winemaster 10% Owner | 100,000 0.43% of outstanding | $2.1M | Apr 11, 2025 | $2.6M |
| Dec 31, 2024 | Winemaster Gary S 10% Stockholder | 68,171 0.30% of outstanding | $2.0M | Dec 31, 2024 | $3.1M |
| Nov 7, 2024 | Winemaster Gary S 10% Stockholder | 81,829 0.36% of outstanding | $1.8M | Nov 7, 2024 | $2.9M |
| Oct 16, 2024 | Winemaster Gary S 10% Stockholder | 9,214 0.04% of outstanding | $225k | Oct 16, 2024 | $3.8M |
Transactions
The newest 50 of 160 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 17, 2026 | Nan (Richard) Hu Chief Executive Officer | AGrant or award Phantom Stockderivative | +5,867 | $0.00 | $0 | 5,867 | Aug 17, 2026 |
| Mar 6, 2026 | Xun Li CFO | AGrant or award Phantom Stockderivative | +1,665 | $0.00 | $0 | 1,665 | Apr 17, 2026 |
| Mar 6, 2026 | Zhaoying Du GC and Corp Secy | AGrant or award Phantom Stockderivative | +1,492 | $0.00 | $0 | 1,492 | Apr 17, 2026 |
| Feb 12, 2026 | Xun Li CFO | MOption exercise Common Stock | +7,500 | $2.00 | $15k | 8,021 | Feb 17, 2026 |
| Feb 12, 2026 | Xun Li CFO | FTax withholding Common Stock | -3,429 | $92.72 | $318k | 4,592 | Feb 17, 2026 |
| Feb 12, 2026 | Xun Li CFO | MOption exercise Stock Appreciation Rightsderivative | -7,500 | $0.00 | $0 | 7,500 | Feb 17, 2026 |
| Dec 11, 2025 | Hong He director | AGrant or award Common Stock | +5,000 | $0.00 | $0 | 23,750 | Dec 12, 2025 |
| Dec 11, 2025 | Courtney C. Shea director | AGrant or award Common Stock | +5,000 | $0.00 | $0 | 5,000 | Dec 12, 2025 |
| Dec 11, 2025 | Frank P Simpkins director | AGrant or award Common Stock | +5,000 | $0.00 | $0 | 30,000 | Dec 12, 2025 |
| Dec 11, 2025 | Zhaoying Du GC and Corp Secy | AGrant or award Stock Appreciation Rightderivative | +700 | $0.00 | $0 | 700 | Dec 12, 2025 |
| Sep 11, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -6,738 | $91.72 | $618k | 10,672,860 | Sep 15, 2025 |
| Sep 11, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -19,351 | $92.46 | $1.8M | 10,653,509 | Sep 15, 2025 |
| Sep 11, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -23,231 | $93.64 | $2.2M | 10,630,278 | Sep 15, 2025 |
| Sep 11, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -30,519 | $94.33 | $2.9M | 10,599,759 | Sep 15, 2025 |
| Sep 10, 2025 | Hong He director | SOpen-market sale Common Stock | -1,000 | $95.00 | $95k | 20,250 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -6,308 | $90.28 | $570k | 10,709,844 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -5,018 | $91.44 | $459k | 10,704,826 | Sep 12, 2025 |
| Sep 11, 2025 | Hong He director | SOpen-market sale Common Stock | -1,500 | $94.00 | $141k | 18,750 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -14,557 | $92.34 | $1.3M | 10,690,269 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -2,515 | $93.50 | $235k | 10,687,754 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -7,585 | $94.45 | $716k | 10,680,169 | Sep 12, 2025 |
| Sep 10, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -571 | $95.20 | $54k | 10,679,598 | Sep 12, 2025 |
| Sep 9, 2025 | Hong He director | SOpen-market sale Common Stock | -1,500 | $90.00 | $135k | 23,750 | Sep 11, 2025 |
| Sep 9, 2025 | Constantine Xykis CEO | SOpen-market sale Common Stock | -7,854 | $91.31 | $717k | 0 | Sep 11, 2025 |
| Sep 9, 2025 | Hong He director | SOpen-market sale Common Stock | -2,500 | $92.31 | $231k | 21,250 | Sep 11, 2025 |
| Sep 8, 2025 | Hong He director | SOpen-market sale Common Stock | -1,000 | $89.00 | $89k | 25,250 | Sep 10, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -13,548 | $80.66 | $1.1M | 10,796,651 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -21,925 | $81.57 | $1.8M | 10,774,726 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -17,075 | $82.49 | $1.4M | 10,757,651 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -11,923 | $83.46 | $995k | 10,745,728 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -9,949 | $84.35 | $839k | 10,735,779 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -2,093 | $85.81 | $180k | 10,733,686 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -11,295 | $86.74 | $980k | 10,722,391 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -2,676 | $87.52 | $234k | 10,719,715 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -3,385 | $88.35 | $299k | 10,716,300 | Aug 28, 2025 |
| Aug 26, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -178 | $89.00 | $16k | 10,716,152 | Aug 28, 2025 |
| Aug 25, 2025 | Xun Li CFO | SOpen-market sale Common Stock | -3,600 | $91.60 | $330k | 4,621 | Aug 27, 2025 |
| Aug 25, 2025 | Frank P Simpkins director | SOpen-market sale Common Stock | -10,000 | $91.64 | $916k | 25,000 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -6,948 | $88.78 | $617k | 10,854,677 | Aug 27, 2025 |
| Aug 25, 2025 | Xun Li CFO | SOpen-market sale Common Stock | -3,600 | $92.93 | $335k | 1,021 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -8,102 | $89.48 | $725k | 10,846,575 | Aug 27, 2025 |
| Aug 25, 2025 | Xun Li CFO | SOpen-market sale Common Stock | -600 | $93.20 | $56k | 421 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -9,003 | $90.38 | $814k | 10,837,572 | Aug 27, 2025 |
| Aug 25, 2025 | Xun Li CFO | SOpen-market sale Common Stock | -200 | $93.30 | $19k | 221 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -12,283 | $91.63 | $1.1M | 10,825,289 | Aug 27, 2025 |
| Aug 25, 2025 | Xun Li CFO | POpen-market purchase Common Stock | +300 | $92.82 | $28k | 521 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -11,395 | $92.56 | $1.1M | 10,813,894 | Aug 27, 2025 |
| Aug 25, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -3,695 | $93.18 | $344k | 10,810,199 | Aug 27, 2025 |
| Aug 22, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -3,308 | $81.57 | $270k | 10,945,527 | Aug 26, 2025 |
| Aug 22, 2025 | Weichai America Corp. owner | SOpen-market sale Common Stockindirect: See Explanation of Responses | -3,720 | $82.45 | $307k | 10,941,807 | Aug 26, 2025 |
50 of 160 rows shown.
Insiders
Everyone who has filed a Form 4 here.
- Zhaoying DuGC and Corp Secy
- Hong Hedirector
- Nan (Richard) HuChief Executive Officer
- Xun LiCFO
- Frank P Simpkinsdirector
- Courtney C. Sheadirector
- Weichai America Corp.owner
- Gary S Winemasterowner, other
- Constantine XykisCEO
Questions about PSIX
Answered from the filings on this page, as of the latest one.
Are insiders buying PSIX?
No. In the last 90 days no insider at POWER SOLUTIONS INTERNATIONAL, INC. bought or sold shares on the open market according to SEC Form 4 filings. The rows on file from that period are grants, exercises, tax withholding or other transactions, which carry no view on the price.
Who was the last insider to trade PSIX on the open market?
Weichai America Corp. (10% owner) sold $7.5M of PSIX on Sep 11, 2025 and filed the Form 4 on Sep 15, 2025. InsiderTell scored 52 (moderate), with 3 insiders on the same side within 14 days.
How many insiders file Form 4 at POWER SOLUTIONS INTERNATIONAL, INC.?
9 people have filed a Form 4 at POWER SOLUTIONS INTERNATIONAL, INC., among them Zhaoying Du (GC and Corp Secy), Hong He (director), Nan (Richard) Hu (Chief Executive Officer). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.