BLACKROCK
Rank #1
7.09%
- Shares
- 24.08M
- Change
- +657.16K
- Change %
- +2.81%
- Filing
- Mar 31, 2026
Increased
Recent
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Top EOSE institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Ownership read
BLACKROCK is the largest loaded institutional holder. 72 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
EOSE
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
24.08M
BLACKROCK
Insider stance
Net selling
$24.99M sold / — bought
Latest filing
May 28, 2026
Most recent holder or insider filing date
Rows loaded
240
120 holder / 120 insider
Top 120 institutional holders
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
BLACKROCK
Rank #1
7.09%
Increased
VANGUARD GROUP INC
Rank #2
5.48%
Increased
DRIEHAUS CAPITAL MANAGEMENT LLC
Rank #3
4.38%
Increased
VANGUARD CAPITAL MANAGEMENT LLC
Rank #4
4.37%
Initiated
TWO SIGMA INVESTMENTS
Rank #5
4.14%
Increased
STATE STREET CORP
Rank #6
2.36%
Increased
GEODE CAPITAL MANAGEMENT
Rank #7
2.30%
Increased
MARSHALL WACE
Rank #8
1.95%
Increased
SUSQUEHANNA INTERNATIONAL GROUP
Rank #9
1.87%
Decreased
CITADEL ADVISORS LLC
Rank #10
1.80%
Increased
ELECTRON CAPITAL PARTNERS
Rank #11
1.58%
Decreased
HRT FINANCIAL LP
Rank #12
1.53%
Increased
CRYSTAL COVE ASSET MANAGEMENT
Rank #13
1.27%
Initiated
STIFEL FINANCIAL CORP
Rank #14
1.22%
Decreased
VOLORIDGE INVESTMENT MANAGEMENT
Rank #15
1.01%
Increased
TWO SIGMA ADVISERS
Rank #16
0.95%
Initiated
GROUP ONE TRADING LLC
Rank #17
0.89%
Increased
MILLENNIUM MANAGEMENT LLC
Rank #18
0.88%
Increased
MORGAN STANLEY
Rank #19
0.87%
Decreased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #20
0.84%
Initiated
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 7.09% | 24.08M | +657.16K Increased | +2.81% | Mar 31, 2026 | |
| 2 | 5.48% | 18.62M | +3.08M Increased | +19.82% | Dec 31, 2025 | |
| 3 | DRIEHAUS CAPITAL MANAGEMENT LLC | 4.38% | 14.87M | +598.88K Increased | +4.20% | Mar 31, 2026 |
| 4 | 4.37% | 14.84M | +14.84M Initiated | — | Mar 31, 2026 | |
| 5 | TWO SIGMA INVESTMENTS | 4.14% | 14.07M | +8.72M Increased | +1.63% | Mar 31, 2026 |
| 6 | 2.36% | 8.02M | +328.09K Increased | +4.27% | Mar 31, 2026 | |
| 7 | 2.30% | 7.81M | +607.39K Increased | +8.43% | Mar 31, 2026 | |
| 8 | MARSHALL WACE | 1.95% | 6.61M | +6.43M Increased | +35.29% | Mar 31, 2026 |
| 9 | SUSQUEHANNA INTERNATIONAL GROUP | 1.87% | 6.35M | -227.69K Decreased | -3.46% | Mar 31, 2026 |
| 10 | CITADEL ADVISORS LLC | 1.80% | 6.10M | +3.64M Increased | +1.48% | Mar 31, 2026 |
| 11 | ELECTRON CAPITAL PARTNERS | 1.58% | 5.38M | -742.24K Decreased | -12.12% | Mar 31, 2026 |
| 12 | HRT FINANCIAL LP | 1.53% | 5.19M | +3.22M Increased | +1.63% | Mar 31, 2026 |
| 13 | CRYSTAL COVE ASSET MANAGEMENT | 1.27% | 4.30M | +4.30M Initiated | — | Mar 31, 2026 |
| 14 | STIFEL FINANCIAL CORP | 1.22% | 4.14M | -97.27K Decreased | -2.30% | Mar 31, 2026 |
| 15 | VOLORIDGE INVESTMENT MANAGEMENT | 1.01% | 3.44M | +3.22M Increased | +14.51% | Mar 31, 2026 |
| 16 | TWO SIGMA ADVISERS | 0.95% | 3.21M | +3.21M Initiated | — | Dec 31, 2025 |
| 17 | GROUP ONE TRADING LLC | 0.89% | 3.01M | +1.75M Increased | +1.39% | Mar 31, 2026 |
| 18 | MILLENNIUM MANAGEMENT LLC | 0.88% | 2.99M | +1.74M Increased | +1.40% | Mar 31, 2026 |
| 19 | 0.87% | 2.96M | -308.92K Decreased | -9.45% | Mar 31, 2026 | |
| 20 | 0.84% | 2.84M | +2.84M Initiated | — | Mar 31, 2026 |
Recent insider transactions
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
WALTERS, MARIAN
Director
Filed May 28, 2026
WALTERS, MARIAN
Director
Filed May 28, 2026
WALTERS, MARIAN
Director
Filed May 28, 2026
WALTERS, MARIAN
Director
Filed May 20, 2026
WALTERS, MARIAN
Director
Filed May 20, 2026
WALTERS, MARIAN
Director
Filed May 20, 2026
WALTERS, MARIAN
Director
Filed May 19, 2026
URBAN, DAVID
Director
Filed May 19, 2026
DIMITRIEF, ALEXANDER
Director
Filed May 19, 2026
DIMITRIEF, ALEXANDER
Director
Filed May 19, 2026
DEMBY, CLAUDE
Director
Filed May 19, 2026
DEMBY, CLAUDE
Director
Filed May 19, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | WALTERS, MARIAN Director | <0.01% | Sale to issuer | 30.00K | Not reported | Not reported | May 28, 2026 |
| 2 | WALTERS, MARIAN Director | <0.01% | Award / grant | 30.00K | $1.18 | $35,400 | May 28, 2026 |
| 3 | WALTERS, MARIAN Director | <0.01% | Sale to issuer | 30.00K | $9.18 | $275,400 | May 28, 2026 |
| 4 | WALTERS, MARIAN Director | <0.01% | Sale to issuer | 22.32K | $7.20 | $160,697 | May 20, 2026 |
| 5 | WALTERS, MARIAN Director | <0.01% | Sale to issuer | 22.32K | Not reported | Not reported | May 20, 2026 |
| 6 | WALTERS, MARIAN Director | <0.01% | Award / grant | 22.32K | $1.18 | $26,336 | May 20, 2026 |
| 7 | WALTERS, MARIAN Director | <0.01% | Sale to issuer | 7.68K | Not reported | Not reported | May 19, 2026 |
| 8 | URBAN, DAVID Director | <0.01% | Sale to issuer | 23.11K | Not reported | Not reported | May 19, 2026 |
| 9 | DIMITRIEF, ALEXANDER Director | <0.01% | Sale to issuer | 10.79K | $6.88 | $74,201 | May 19, 2026 |
| 10 | DIMITRIEF, ALEXANDER Director | <0.01% | Award / grant | 26.96K | No cash value | No cash value | May 19, 2026 |
| 11 | DEMBY, CLAUDE Director | <0.01% | Sale to issuer | 23.11K | Not reported | Not reported | May 19, 2026 |
| 12 | DEMBY, CLAUDE Director | <0.01% | Sale to issuer | 9.24K | $6.88 | $63,599 | May 19, 2026 |
Frequently asked
BLACKROCK is the largest institutional holder in the loaded EOSE ownership feed, with 24.08 million shares, or about 7.09% of shares outstanding. The table ranks additional institutions by reported share count.
The current TECHi snapshot has 120 loaded institutional rows for Eos Energy Enterprises Inc. 85 rows are marked increased or initiated, while 29 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
The insider transaction table currently shows 120 loaded Form 4 rows for EOSE, with the latest insider filing dated May 28, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
The loaded EOSE Form 4 rows currently read Net selling: 72 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
MASTRANGELO, JOE is the most active insider by absolute share movement in the loaded EOSE rows, with 2.22 million shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.