PSIX · Power Solutions International, Inc. · Shareholders & Ownership

$44.98 -2.19 (-4.64%)

Russell 2000 member Rebalance outlook locked

Market Cap

$1.09B

23.07M

Volume · Oct 23 272.25K Avg daily vol (3M) 438.33K

Every disclosed holder of PSIX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns PSIX

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	160	8,360,013	36.24%	Yes
Insiders (Forms 3, 4, 5)	7	12,906,891	55.96%	Yes
13D/G-only blocks	2	2,820,103	12.23%	Yes
Remaining	—	1,021,557	-4.43%	Negative
Registered funds (N-PORT, not summed)	159	1,691,285	7.33%	No

Shares outstanding: 23,065,450, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of PSIX

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Weichai America Corp. Insider CIK 1702521 · Sep 11, 2025 10% Owner, issuer-wide	10,599,759	45.96%	-79,839	Sep 11, 2025	10% Owner, issuer-wide
1.1	Weichai America Corp. 13D CIK 1702521 · Unknown · Aug 26, 2025 not summed	10,716,152	46.46%	-232,683	Aug 26, 2025	not summed
2	GAGNON SECURITIES LLC 13G CIK 1125725 · Registered investment adviser · Dec 31, 2024 Rule 13d-1(c), passive investor	1,678,849	7.28%	—	Dec 31, 2024	Rule 13d-1(c), passive investor
3	Point72 Asset Management, L.P. 13F CIK 1603466 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,497,155	6.49%	+1,491,805	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	Point72 Asset Management, L.P. 13G CIK 1603466 · Registered investment adviser · Jun 30, 2026 Rule 13d-1(c), passive investor, not summed	1,497,155	6.49%	+341,391	Jun 30, 2026	Rule 13d-1(c), passive investor, not summed
4	Gary S. Winemaster 13D CIK 1517040 · Unknown · Sep 18, 2025 not summed	1,455,259	6.31%	-475,404	Sep 18, 2025	not summed
4.1	Winemaster Gary S Insider CIK 1517040 · Apr 21, 2025 Insider, issuer-wide	2,184,790	9.47%	-760,172	Apr 21, 2025	Insider, issuer-wide
5	Neil Gagnon 13G CIK 1070170 · Unknown · Feb 5, 2025 Rule 13d-1(c), passive investor	1,141,254	4.95%	-1,342,572	Feb 5, 2025	Rule 13d-1(c), passive investor
6	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	818,968	3.55%	+103,412	Jun 30, 2026	carried, not yet filed for the newest quarter
6.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	227,365	0.99%	+19,107	Jun 30, 2026	iShares Trust, not summed
6.2	iShares Russell 2000 Growth ETF Fund S000004343 · Registered fund · Jun 30, 2026 iShares Trust, not summed	76,561	0.33%	+11,849	Jun 30, 2026	iShares Trust, not summed
6.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	28,760	0.12%	+7,196	Jun 30, 2026	iShares Trust, not summed
6.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	17,270	0.07%	+3,048	Jun 30, 2026	Quantitative Master Series LLC, not summed
6.5	iShares Core S&P Total U.S. Stock Market ETF Fund S000004317 · Registered fund · Jun 30, 2026 iShares Trust, not summed	8,766	0.04%	+272	Jun 30, 2026	iShares Trust, not summed
7	Newtyn Management, LLC 13F CIK 1569241 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	600,890	2.61%	+600,890	Jun 30, 2026	carried, not yet filed for the newest quarter
8	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	340,634	1.48%	-340	Jun 30, 2026	carried, not yet filed for the newest quarter
9	Yunqi Capital Ltd 13F CIK 1912273 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	339,000	1.47%	+339,000	Jun 30, 2026	carried, not yet filed for the newest quarter
10	BARCLAYS PLC 13F CIK 312069 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	311,110	1.35%	+72,064	Jun 30, 2026	carried, not yet filed for the newest quarter
11	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	296,812	1.29%	+13,571	Jun 30, 2026	carried, not yet filed for the newest quarter
11.1	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	49,703	0.22%	-23,903	Jul 31, 2026	Dimensional ETF Trust, not summed
11.2	Dimensional U.S. Core Equity 2 ETF Fund S000070903 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	24,326	0.11%	-4,403	Jul 31, 2026	Dimensional ETF Trust, not summed
11.3	U.S. CORE EQUITY 1 PORTFOLIO Fund S000000979 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	23,052	0.10%	0	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
11.4	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	19,580	0.08%	-5,597	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
11.5	U.S. Small Cap Growth Portfolio Fund S000039439 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	15,991	0.07%	+4,678	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
12	OLP CAPITAL MANAGEMENT Ltd 13F CIK 1738126 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	283,940	1.23%	+283,940	Jun 30, 2026	carried, not yet filed for the newest quarter
13	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	256,749	1.11%	0	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
14	Busey Bank 13F CIK 1427202 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	220,000	0.95%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
15	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	216,235	0.94%	+19,938	Jun 30, 2026	carried, not yet filed for the newest quarter
16	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	206,942	0.90%	+109,062	Jun 30, 2026	carried, not yet filed for the newest quarter
17	SG Americas Securities, LLC 13F CIK 1313360 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	194,930	0.85%	-21,465	Jun 30, 2026	carried, not yet filed for the newest quarter
18	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	184,855	0.80%	+14,108	Jun 30, 2026	carried, not yet filed for the newest quarter
18.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	3,100	0.01%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
18.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	238	0.00%	+35	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
18.3	State Street(R) SPDR(R) Portfolio MSCI Global Stock Market ETF Fund S000036082 · Registered fund · Jun 30, 2026 SPDR INDEX SHARES FUNDS, not summed	100	0.00%	0	Jun 30, 2026	SPDR INDEX SHARES FUNDS, not summed
19	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	147,333	0.64%	+103,027	Jun 30, 2026	carried, not yet filed for the newest quarter
19.1	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	16,760	0.07%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
19.2	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	12,550	0.05%	+2,736	May 31, 2026	Goldman Sachs ETF Trust, not summed
19.3	Goldman Sachs Small Cap Growth Insights Fund Fund S000014930 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	11,810	0.05%	—	Jul 31, 2026	Goldman Sachs Trust, not summed
19.4	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	44	0.00%	-109	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
20	FIRST TRUST ADVISORS LP 13F CIK 1125816 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	146,750	0.64%	+60,627	Jun 30, 2026	carried, not yet filed for the newest quarter
20.1	First Trust Small Cap Growth AlphaDEX Fund Fund S000031806 · Registered fund · Jul 31, 2026 First Trust Exchange-Traded AlphaDEX Fund, not summed	44,276	0.19%	-32,326	Jul 31, 2026	First Trust Exchange-Traded AlphaDEX Fund, not summed
20.2	First Trust Nasdaq BuyWrite Income ETF Fund S000040305 · Registered fund · Jun 30, 2026 First Trust Exchange-Traded Fund VI, not summed	6,700	0.03%	—	Jun 30, 2026	First Trust Exchange-Traded Fund VI, not summed
20.3	First Trust Multi Cap Growth AlphaDEX Fund Fund S000017343 · Registered fund · Jul 31, 2026 First Trust Exchange-Traded AlphaDEX Fund, not summed	4,013	0.02%	-3,139	Jul 31, 2026	First Trust Exchange-Traded AlphaDEX Fund, not summed
21	Yiheng Capital Management, L.P. 13F CIK 1447228 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	133,500	0.58%	+133,500	Jun 30, 2026	carried, not yet filed for the newest quarter
22	Meros Investment Management, LP 13F CIK 1911372 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	129,266	0.56%	+90,000	Jun 30, 2026	carried, not yet filed for the newest quarter
23	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	113,003	0.49%	-54,034	Jun 30, 2026	carried, not yet filed for the newest quarter
24	TWO SIGMA INVESTMENTS, LP 13F CIK 1179392 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	108,961	0.47%	+62,590	Jun 30, 2026	carried, not yet filed for the newest quarter
25	Hel Ved Capital Management Ltd 13F CIK 1840129 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	100,876	0.44%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
26	ALLIANCEBERNSTEIN L.P. 13F CIK 1109448 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	98,700	0.43%	+65,260	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	Small Cap Core Portfolio Fund S000051867 · Registered fund · Jun 30, 2026 Bernstein Fund Inc, not summed	79,900	0.35%	+54,560	Jun 30, 2026	Bernstein Fund Inc, not summed
27	Valiant Capital Management, L.P. 13F CIK 1452689 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	81,674	0.35%	+12,286	Jun 30, 2026	carried, not yet filed for the newest quarter
28	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	75,598	0.33%	+318	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
29	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	74,796	0.32%	-5,303	Jun 30, 2026	carried, not yet filed for the newest quarter
29.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	4,341	0.02%	+600	Jun 30, 2026	Northern Funds, not summed
29.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	2,255	0.01%	-82	Jun 30, 2026	Northern Funds, not summed
30	Defiance ETFs, LLC 13F CIK 1732541 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	72,881	0.32%	+52,013	Jun 30, 2026	carried, not yet filed for the newest quarter
31	Tidal Investments LLC 13F CIK 1600064 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	72,447	0.31%	+43,068	Jun 30, 2026	carried, not yet filed for the newest quarter
32	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	70,150	0.30%	-35,079	Jun 30, 2026	carried, not yet filed for the newest quarter
33	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	68,591	0.30%	-6,162	Jun 30, 2026	carried, not yet filed for the newest quarter
33.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	31,949	0.14%	-436	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
33.2	Schwab Small-Cap Equity Fund Fund S000005516 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	23,072	0.10%	+12,241	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
33.3	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	21,022	0.09%	+2,068	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
33.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	3,500	0.02%	0	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
33.5	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	3,000	0.01%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
34	CAPITAL FUND MANAGEMENT S.A. 13F CIK 1323645 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	63,068	0.27%	+15,755	Jun 30, 2026	carried, not yet filed for the newest quarter
35	Landini Kenneth W Insider CIK 1517035 · Dec 12, 2024 Director, issuer-wide	59,000	0.26%	+5,000	Dec 12, 2024	Director, issuer-wide
36	LPL Financial LLC 13F CIK 1403438 · Broker-dealer · Jun 30, 2026 carried, not yet filed for the newest quarter	57,706	0.25%	-98,479	Jun 30, 2026	carried, not yet filed for the newest quarter
37	CITIGROUP INC 13F CIK 831001 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	53,989	0.23%	+52,460	Jun 30, 2026	carried, not yet filed for the newest quarter
38	OnyxPoint Global Management LP 13F CIK 1961491 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	53,458	0.23%	-24,461	Jun 30, 2026	carried, not yet filed for the newest quarter
39	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	52,017	0.23%	+24,058	Jun 30, 2026	carried, not yet filed for the newest quarter
40	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	50,986	0.22%	+2,296	Jun 30, 2026	carried, not yet filed for the newest quarter
41	Defiance AI & Power Infrastructure ETF Fund S000090210 · Registered fund · May 31, 2026 Tidal Trust II, not summed	47,648	0.21%	+29,120	May 31, 2026	Tidal Trust II, not summed
42	VICTORY CAPITAL MANAGEMENT INC 13F CIK 1040188 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	45,761	0.20%	+8,445	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	Victory Small Cap Stock Fund Fund S000012914 · Registered fund · Jul 31, 2026 Victory Portfolios III, not summed	42,979	0.19%	+13,191	Jul 31, 2026	Victory Portfolios III, not summed
42.2	Victory Cornerstone Aggressive Fund Fund S000037226 · Registered fund · May 31, 2026 Victory Portfolios III, not summed	1,805	0.01%	+600	May 31, 2026	Victory Portfolios III, not summed
42.3	Victory Extended Market Index Fund Fund S000012941 · Registered fund · Jul 31, 2026 Victory Portfolios III, not summed	977	0.00%	+2	Jul 31, 2026	Victory Portfolios III, not summed
43	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	45,707	0.20%	+37,220	Jun 30, 2026	carried, not yet filed for the newest quarter
44	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	43,828	0.19%	+1,462	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
45	Bridge City Capital, LLC 13F CIK 1713521 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	40,658	0.18%	+7,865	Jun 30, 2026	carried, not yet filed for the newest quarter
46	VOLORIDGE INVESTMENT MANAGEMENT, LLC 13F CIK 1556921 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,637	0.16%	-34,993	Jun 30, 2026	carried, not yet filed for the newest quarter
47	ExodusPoint Capital Management, LP 13F CIK 1736225 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	37,020	0.16%	+37,020	Jun 30, 2026	carried, not yet filed for the newest quarter
48	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	35,290	0.15%	+620	Jun 30, 2026	carried, not yet filed for the newest quarter
49	Man Group plc 13F CIK 1637460 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	34,788	0.15%	-53,879	Jun 30, 2026	carried, not yet filed for the newest quarter
50	RAYMOND JAMES FINANCIAL INC 13F CIK 720005 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	30,479	0.13%	-2,385	Jun 30, 2026	carried, not yet filed for the newest quarter

18 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 242 holders

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Key facts CIK 1137091 CUSIP 73933G202 13F (30d) 24 filings 23 filers Visit website Investor relations