Vault-13

PIONEER PWR SOLUTIONS INC PPSI

COM NEW · Common Stock · CUSIP 723836300

35 institutional holders +2 vs Q1 2026
1,476,0691.5m shares reported held*
13.3% of all shares outstanding*
$5.8mreported value*
8 new 10 added 4 reduced 7 sold out net bought ≈ $1.8m (+455.8k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 11.1m as of 2026-08-13, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $3.94. Options: 4 managers hold calls ($1.1m notional), 0 hold puts (—).

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

02040Q3 22: 19Q4 22: 18Q1 23: 18Q2 23: 26Q3 23: 32Q4 23: 33Q1 24: 33Q2 24: 24Q3 24: 29Q4 24: 29Q1 25: 21Q2 25: 25Q3 25: 28Q4 25: 34Q1 26: 33Q2 26: 3535Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202219
Q4 202218
Q1 202318
Q2 202326
Q3 202332
Q4 202333
Q1 202433
Q2 202424
Q3 202429
Q4 202429
Q1 202521
Q2 202525
Q3 202528
Q4 202534
Q1 202633
Q2 202635

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
20020Q3 24: 15 bought or addedQ3 24: 7 cut or sold outQ4 24: 16 bought or addedQ4 24: 15 cut or sold outQ4 24Q1 25: 8 bought or addedQ1 25: 16 cut or sold outQ2 25: 13 bought or addedQ2 25: 8 cut or sold outQ2 25Q3 25: 16 bought or addedQ3 25: 13 cut or sold outQ4 25: 19 bought or addedQ4 25: 12 cut or sold outQ4 25Q1 26: 15 bought or addedQ1 26: 10 cut or sold outQ2 26: 18 bought or addedQ2 26: 11 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 2024157
Q4 20241615
Q1 2025816
Q2 2025138
Q3 20251613
Q4 20251912
Q1 20261510
Q2 20261811

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$500k$1m$1.5mQ3 25 calls: $251.0kQ3 25 puts: $89.4kQ3 25P/C 0.36Q4 25 calls: $95.5kQ4 25 puts: $126.3kQ4 25P/C 1.32Q1 26 calls: $53.3kQ1 26 puts: $0Q1 26P/C 0.00Q2 26 calls: $1.1mQ2 26 puts: $0Q2 26P/C 0.00
Numbers
QuarterCallsPutsP/C
Q3 2025$251.0k$89.4k0.36
Q4 2025$95.5k$126.3k1.32
Q1 2026$53.3k$00.00
Q2 2026$1.1m$00.00

Biggest buyers

ACADIAN ASSET MANAGEMENT LLC New +127,977+128.0k
JANE STREET GROUP, LLC New +114,403+114.4k
CITADEL ADVISORS LLC New +70,794+70.8k
HRT FINANCIAL LP New +64,889+64.9k
RENAISSANCE TECHNOLOGIES LLC Added +62,288+62.3k
BlackRock, Inc. Added +31,300+31.3k
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added +24,778+24.8k
VANGUARD FIDUCIARY TRUST CO Added +12,639+12.6k
UBS Group AG New +12,523+12.5k
SIMPLEX TRADING, LLC Added +12,401+12.4k

Biggest sellers

Squarepoint Ops LLC Sold out -67,558-67.6k
MARSHALL WACE, LLP Sold out -15,454-15.5k
GSA CAPITAL PARTNERS LLP Sold out -13,388-13.4k
GROUP ONE TRADING LLC Sold out -8,928-8.9k
Tower Research Capital LLC (TRC) Reduced -1,663-1.7k
ARMSTRONG ADVISORY GROUP, INC Sold out -400-400
VANGUARD CAPITAL MANAGEMENT LLC Reduced -349-349
Clarity Asset Management, Inc. Sold out -250-250
OSAIC HOLDINGS, INC. Reduced -5-5
SBI Securities Co., Ltd. Reduced -3-3

Biggest calls

PEAK6 LLC New $788.0k200.0k shares
CITADEL ADVISORS LLC Added $188.3k47.8k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP New $68.6k17.4k shares
GROUP ONE TRADING LLC New $5.9k1.5k shares

Biggest puts

None

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
202Q4 24: 0 buyingQ4 24: 2 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 1 buyingQ4 25: 0 sellingQ1 26: 0 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—2$67.4k—
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20251$33.9k0——
Q1 20260—0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio MALVERN, PA 195,788195.8k $771.4k $771.4k 0.00% Reduced -349 -349
2 Spectrum Investment Advisors, Inc. 0.22% of their portfolio MEQUON, WI 137,500137.5k $541.8k $541.8k 0.22% Unchanged
3 ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio Boston, MA 127,977128.0k $503.0k $503.0k 0.00% New
4 RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio NEW YORK, NY 126,488126.5k $498.4k $498.4k 0.00% Added +62.3k +62,288
5 GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio BOSTON, MA 116,631116.6k $459.6k $459.6k 0.00% Added +1.2k +1,250
6 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 114,403114.4k $450.7k $450.7k 0.00% New
7 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 80,36980.4k $316.7k $316.7k 0.00% Added +24.8k +24,778
8 DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio AUSTIN, TX 80,09280.1k $315.6k $315.6k 0.00% Added +2.9k +2,869
9 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 70,79470.8k $278.9k $278.9k 0.00% New
10 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 64,88964.9k $255.0k $255.0k 0.00% New
11 BlackRock, Inc. 0.00% of their portfolio New York, NY 59,97460.0k $236.3k $236.3k 0.00% Added +31.3k +31,300
12 VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio MALVERN, PA 48,23148.2k $190.0k $190.0k 0.00% Added +12.6k +12,639
13 STATE STREET CORP 0.00% of their portfolio BOSTON, MA 34,02834.0k $134.1k $134.1k 0.00% Unchanged
14 XTX Topco Ltd 0.00% of their portfolio LONDON, X0 27,43227.4k $108.1k $108.1k 0.00% Added +5.7k +5,698
15 JAMES INVESTMENT RESEARCH, INC. 0.01% of their portfolio ALPHA, OH 21,78621.8k $85.8k $85.8k 0.01% Unchanged
16 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 21,78621.8k $85.8k $85.8k 0.00% Unchanged
17 Sage Capital Management, LLC 0.03% of their portfolio Stockton, NJ 21,00021.0k $82.7k $82.7k 0.03% Unchanged
18 NORTHERN TRUST CORP 0.00% of their portfolio CHICAGO, IL 20,97421.0k $82.6k $82.6k 0.00% Added +6.5k +6,505
19 Stratos Wealth Advisors, LLC 0.00% of their portfolio BEACHWOOD, OH 20,80020.8k $82.0k $82.0k 0.00% Added +3.5k +3,500
20 Legacy Advisors, LLC 0.01% of their portfolio PLYMOUTH MEETING, PA 16,02516.0k $63.1k $63.1k 0.01% Unchanged
21 SMITH, MOORE & CO. 0.00% of their portfolio CLAYTON, MO 13,00013.0k $51.2k $51.2k 0.00% Unchanged
22 SIMPLEX TRADING, LLC 0.00% of their portfolio CHICAGO, IL 12,75112.8k $50.2k $50.2k 0.00% Added +12.4k +12,401
23 UBS Group AG 0.00% of their portfolio ZURICH, V8 12,52312.5k $49.3k $49.3k 0.00% New
24 Pekin Hardy Strauss, Inc. 0.00% of their portfolio CHICAGO, IL 10,00010.0k $39.4k $39.4k 0.00% New
25 Rockefeller Capital Management L.P. 0.00% of their portfolio NEW YORK, NY 10,00010.0k $39.4k $39.4k 0.00% Unchanged
26 MORGAN STANLEY 0.00% of their portfolio NEW YORK, NY 7,7407.7k $30.5k $30.5k 0.00% Unchanged
27 OSAIC HOLDINGS, INC. 0.00% of their portfolio SCOTTSDALE, AZ 1,0761.1k $4.2k $4.2k 0.00% Reduced -5 -5
28 JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio DES PERES, MO 1,0001.0k $3.9k $3.9k 0.00% Unchanged
29 NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio MONTREAL, A8 300300 $1.2k $1.2k 0.00% Unchanged
30 Global Retirement Partners, LLC 0.00% of their portfolio San Rafael, CA 253253 $997 $997 0.00% First filing
31 Tower Research Capital LLC (TRC) 0.00% of their portfolio NEW YORK, NY 220220 $867 $867 0.00% Reduced -1.7k -1,663
32 SBI Securities Co., Ltd. 0.00% of their portfolio TOKYO, M0 158158 $623 $623 0.00% Reduced -3 -3
33 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 4848 $190 $190 0.00% Unchanged
34 Caitong International Asset Management Co., Ltd 0.00% of their portfolio HONG KONG, K3 3030 $118 $118 0.00% New
35 Strive Financial Group ,LLC 0.00% of their portfolio CARMEL, IN 33 $12 $12 0.00% New