Pioneer Power Solutions, Inc. (Nasdaq: PPSI), an SEC filer in Miscellaneous Electrical Machinery, Equipment & Supplies, closed at $2.87, -2.4%, on 2026-08-28, with a market cap of $33M as of 2026-08-27, a return on equity of -18.5%, a net margin of -21.7% and 3-year sales growth of 2.2%. Institutional ownership, earnings history and filed financials are on the tabs below.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | VANGUARD CAPITAL MANAGEMENT LLC | 196,137196,137 | $637,445 | 1.77% | NEW |
| 2 | Spectrum Investment Advisors, Inc. | 137,500137,500 | $446,875 | 1.24% | — |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | 115,381115,381 | $375,053 | 1.04% | ADD 3% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 77,22377,223 | $250,975 | 0.70% | ADD 8% |
| 5 | Squarepoint Ops LLC | 67,55867,558 | $219,564 | 0.61% | NEW |
| 6 | RENAISSANCE TECHNOLOGIES LLC | 64,20064,200 | $208,650 | 0.58% | ADD 85% |
| 7 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 55,59155,591 | $180,671 | 0.50% | ADD 213% |
| 8 | VANGUARD FIDUCIARY TRUST CO | 35,59235,592 | $115,674 | 0.32% | NEW |
| 9 | STATE STREET CORP | 34,02834,028 | $110,591 | 0.31% | — |
| 10 | BlackRock, Inc. | 28,67428,674 | $93,191 | 0.26% | — |
Ranked by each filer’s own reported value, not shares.
1 holder — The filer reported no value for this line, so it carries no dollar figure and is left out of the percentage and value columns.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | +196,137 | $637,445 | OPEN |
| Squarepoint Ops LLC | +67,558 | $219,564 | OPEN |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | +37,858 | $123,039 | ADD |
| VANGUARD FIDUCIARY TRUST CO | +35,592 | $115,674 | OPEN |
| RENAISSANCE TECHNOLOGIES LLC | +29,500 | $95,875 | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −231,849 | $753,509 | CLOSE |
| CITADEL ADVISORS LLC | −23,181 | $75,338 | CLOSE |
| JANE STREET GROUP, LLC | −18,296 | $59,462 | CLOSE |
| NORTHERN TRUST CORP | −8,299 | $26,972 | TRIM |
| SIMPLEX TRADING, LLC | −808 | $2,626 | TRIM |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 196K | $637,445 |
| Spectrum Investment Advisors, Inc. | — | — | — | — | 138K | 138K | $446,875 |
| GEODE CAPITAL MANAGEMENT, LLC | 100K | 108K | 109K | 109K | 112K | 115K | $375,053 |
| DIMENSIONAL FUND ADVISORS LP | 50K | 56K | 55K | 66K | 72K | 77K | $250,975 |
| Squarepoint Ops LLC | 25K | — | 27K | — | — | 68K | $219,564 |
| RENAISSANCE TECHNOLOGIES LLC | — | — | 33K | 25K | 35K | 64K | $208,650 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 25K | — | — | 17K | 18K | 56K | $180,671 |
| VANGUARD FIDUCIARY TRUST CO | — | — | — | — | — | 36K | $115,674 |
| STATE STREET CORP | 30K | 30K | 30K | 30K | 34K | 34K | $110,591 |
| BlackRock, Inc. | 48K | 48K | 29K | 29K | 29K | 29K | $93,191 |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Breaks = no 13F that quarter.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
