Stocks › PSIX
POWER SOLUTIONS INTERNATIONAL, INC.
PSIX·Nasdaq·
United States·USD
United States·USD$47.93
+3.06 (+6.82%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
PSIX
POWER SOLUTIONS INTERNATIONAL, INC. · Nasdaq
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
PSIXS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
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Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of PSIX by members of U.S. Congress · 9 on record
Whale Activity
Position changes in PSIX reported for 2026-06-30 by 7 tracked institutional filers
- Increased5
- New0
- Held0
- Decreased2
- Closed0
- No prior filing0
| Filer | Shares | Value | Change |
|---|---|---|---|
| Point72 Asset Management, L.P. | 1.5M | $58.2M | increased |
| BlackRock, Inc. | 819.0K | $31.8M | increased |
| VANGUARD CAPITAL MANAGEMENT LLC | 340.6K | $13.2M | decreased |
| MILLENNIUM MANAGEMENT LLC | 206.9K | $8.0M | increased |
| TWO SIGMA INVESTMENTS, LP | 109.0K | $4.2M | increased |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 70.2K | $2.7M | decreased |
| CITADEL ADVISORS LLC | 52.0K | $2.0M | increased |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by PSIX insiders, by quarter · Form 4
Recent Insider Transactions
487 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| Li XunCFO | Tax withholding | −3,429 | $92.72 | $318K | Feb 12, 2026 | Form 4 ↗ |
| Li XunCFO | Option exercise | +7,500 | $2.00 | $15K | Feb 12, 2026 | Form 4 ↗ |
| He HongDirector | Grant / award | +5,000 | $0.00 | $0 | Dec 11, 2025 | Form 4 ↗ |
| SIMPKINS FRANK PDirector | Grant / award | +5,000 | $0.00 | $0 | Dec 11, 2025 | Form 4 ↗ |
| Shea Courtney C.Director | Grant / award | +5,000 | $0.00 | $0 | Dec 11, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −30.5K | $94.33 | $2.9M | Sep 11, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −23.2K | $93.64 | $2.2M | Sep 11, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −19.4K | $92.46 | $1.8M | Sep 11, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −6,738 | $91.72 | $618K | Sep 11, 2025 | Form 4 ↗ |
| He HongDirector | Sale | −1,500 | $94.00 | $141K | Sep 11, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −571 | $95.20 | $54K | Sep 10, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −7,585 | $94.45 | $716K | Sep 10, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −2,515 | $93.50 | $235K | Sep 10, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −14.6K | $92.34 | $1.3M | Sep 10, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −5,018 | $91.44 | $459K | Sep 10, 2025 | Form 4 ↗ |
| Weichai Power Co., Ltd.10% owner | Sale | −6,308 | $90.28 | $569K | Sep 10, 2025 | Form 4 ↗ |
| He HongDirector | Sale | −1,000 | $95.00 | $95K | Sep 10, 2025 | Form 4 ↗ |
| Xykis ConstantineCEO | Sale | −7,854 | $91.31 | $717K | Sep 9, 2025 | Form 4 ↗ |
| He HongDirector | Sale | −2,500 | $92.31 | $231K | Sep 9, 2025 | Form 4 ↗ |
| He HongDirector | Sale | −1,500 | $90.00 | $135K | Sep 9, 2025 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding PSIX · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 256.7K | $10.0M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF iShares Trust | 227.4K | $8.8M | 0.01% | Jun 30, 2026 |
| Allspring SMID Cap Growth Fund ALLSPRING FUNDS TRUST | 85.4K | $5.2M | 0.64% | Mar 31, 2026 |
| HUSSMAN STRATEGIC MARKET CYCLE FUND HUSSMAN INVESTMENT TRUST | 60.0K | $3.7M | 0.92% | Mar 31, 2026 |
| First Trust Small Cap Core AlphaDEX Fund First Trust Exchange-Traded AlphaDEX Fund | 45.6K | $3.3M | 0.28% | Apr 30, 2026 |
| Small Cap Core Portfolio Bernstein Fund Inc | 79.9K | $3.1M | 0.36% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF iShares Trust | 76.6K | $3.0M | 0.02% | Jun 30, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 75.6K | $2.9M | 0.00% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund Fidelity Salem Street Trust | 94.6K | $2.6M | 0.01% | Jul 31, 2026 |
| NVIT Allspring Discovery Fund NATIONWIDE VARIABLE INSURANCE TRUST | 41.5K | $2.5M | 0.64% | Mar 31, 2026 |
Mutual funds and ETFs whose N-PORT filings list PSIX's shares (CUSIP 73933G202), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
- Steven A. CohenSCHEDULE 13G/A · passive (13G) · 1.5M shares6.5%
Aug 14, 2026 · ↗ - Point72 Capital Advisors, Inc.SCHEDULE 13G/A · passive (13G) · 1.5M shares6.5%
Aug 14, 2026 · ↗ - Point72 Asset Management, L.P.SCHEDULE 13G/A · passive (13G) · 1.5M shares6.5%
Aug 14, 2026 · ↗ - Steven A. CohenSCHEDULE 13G · passive (13G) · 1.2M shares5.0%
May 22, 2026 · ↗ - Point72 Capital Advisors, Inc.SCHEDULE 13G · passive (13G) · 1.2M shares5.0%
May 22, 2026 · ↗ - Point72 Asset Management, L.P.SCHEDULE 13G · passive (13G) · 1.2M shares5.0%
May 22, 2026 · ↗
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming power solutions international as client
- THE LANDE GROUPPOWER SOLUTIONS INTERNATIONAL (PSI) · 2026 Q2 · TRD, MAN, TAR—
Filing ↗ - THE LANDE GROUPPOWER SOLUTIONS INTERNATIONAL (PSI) · 2026 Q1 · TRD, MAN, TAR—
Filing ↗ - THE LANDE GROUPPOWER SOLUTIONS INTERNATIONAL (PSI) · 2025 Q4 · TRD, MAN, TAR—
Filing ↗ - THE LANDE GROUPPOWER SOLUTIONS INTERNATIONAL (PSI) · 2025 Q3 · TRD, MAN, TAR—
Filing ↗ - THE LANDE GROUPPOWER SOLUTIONS INTERNATIONAL (PSI) · 2025 Q2 · TRD, MAN, TAR$30K
Filing ↗
Government Contracts
Federal awards to POWER SOLUTIONS INTERNATIONAL, INC. · USAspending
No federal contract awards found for POWER SOLUTIONS INTERNATIONAL, INC..
U.S. Patents
Recent USPTO applications naming POWER SOLUTIONS INTERNATIONAL, INC.
No USPTO patent applications found for POWER SOLUTIONS INTERNATIONAL, INC..
Annual Financials
From PSIX's 10-K filings · XBRL
No annual XBRL figures on record for PSIX. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
No stock splits in PSIX's price history.
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 1.01, 1.02, 2.03, 8.01, 9.01Material agreement · Termination of agreement · Direct financial obligationSep 30, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsAug 6, 2026
EDGAR ↗ - 8-K · Items 5.02, 5.07, 7.01, 9.01Officer / director change · Shareholder vote · Reg FD disclosureJul 27, 2026
EDGAR ↗ - 8-K · Items 5.02, 9.01Officer / director changeMay 13, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsMay 11, 2026
EDGAR ↗
About POWER SOLUTIONS INTERNATIONAL, INC.
From SEC EDGAR company records
Industry (SIC 3510)Engines & Turbines
SectorIndustrials
HeadquartersWOOD DALE, IL
IncorporatedIL
SEC CIK0001137091 ↗
Former namesFORMAT INC, FORMAT INC /FA/