ACFN Acorn Energy, Inc.
Acorn Energy, Inc. (ACFN) Institutional Ownership
What the institutions did with ACFN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC | 38.0K | 34.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 18.2K | 16.4% |
| CITADEL ADVISORS LLC | 16.3K | 14.7% |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 12.5K | 11.3% |
| Mink Brook Asset Management LLC | 10.0K | 9.0% |
| VANGUARD FIDUCIARY TRUST CO | 8.4K | 7.6% |
| BlackRock, Inc. | 5.4K | 4.9% |
| Access Investment Management LLC | 1.2K | 1.1% |
| OSAIC HOLDINGS, INC. | 351 | 0.3% |
| Tower Research Capital LLC (TRC) | 327 | 0.3% |
| NATIONAL BANK OF CANADA /FI/ | 245 | 0.2% |
| Federation des caisses Desjardins du Quebec | 25 | 0.0% |
| HUNTINGTON NATIONAL BANK | 1 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CITADEL ADVISORS LLC | New | 0 | 16.3K | +16.3K |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | New | 0 | 12.5K | +12.5K |
| BlackRock, Inc. | New | 0 | 5.4K | +5.4K |
| OSAIC HOLDINGS, INC. | Reduced | 1.9K | 351 | -1.5K |
| UBS Group AG | Sold Out | 693 | 0 | -693 |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 37.6K | 38.0K | +340 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 17.9K | 18.2K | +259 |
| Tower Research Capital LLC (TRC) | Increased | 170 | 327 | +157 |
| VANGUARD FIDUCIARY TRUST CO | Increased | 8.4K | 8.4K | +60 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.