NASDAQ · Industrials · Holders
Eos Energy Enterprises (EOSE) Institutional Ownership & Insider Trading History
Top EOSE institutional positions and insider transactions, with filters for buys, sales, option exercises, gifts, and tax withholding.
- Last confirmed price
- $1.74-7.45%
- Nov 10, 2026, 4:00 PM EST · Prices may be delayed
Data dates
Prices as of Nov 10, 4:00 PM EST · Fundamentals checked Nov 10, 10:11 PM EST · Statement period ended Sep 30, 2026
Ownership read
EOSE insider transaction activity: Mixed, sale-heavy.
Blackrock Inc. is the largest institutional holder. 33 classified sales and 5 classified purchases appear in the recent insider records. 44 transactions lack a reliable action code. Use the filters below to separate open-market activity from option exercises, gifts, awards, and tax withholding.
Insider flow
EOSE
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
27.13M
Blackrock Inc.
Insider transaction activity
Mixed, sale-heavy
$25.98M sold / $751.66K bought · 44 unclassified
Observations shown
112
10 holder / 102 insider
- Increased / initiated
- Unavailable
- Prior positions were not supplied
- Insider rows
- 102
- Transaction dates shown per row
Ownership concentration and transaction activity
- Top 10 reported holders
- Position dates differ
- Changes with share-count history
- Prior-position data unavailable
- New / exited positions
- Prior-position data unavailable
- Largest increase with share-count history
- Prior share counts unavailable
These changes cover the holders shown. A holder missing from this list may still own shares. Compare positions from the same reporting quarters.
Net shares sold: 2,948,076
Classified sale shares minus classified purchase shares in this sample. Includes disclosed plans and unknown plan status; excludes grants, gifts, exercises and withholding. This is activity, not sentiment.
- Purchase / sale; plan unknown: 38
- Other / unclassified: 44
- Conversion / exercise: 17
- Grant: 1
- Gift: 2
Top 10 institutional holders
Eos Energy Enterprises (EOSE) institutional ownership
Ranked by reported share count. Position dates and filing dates are separate when the provider supplies both.
Source: Yahoo Finance. A position date is not a filing date. View current provider table. To check a manager's 13F, search its name in SEC EDGAR; a search result is not a verified match to a row here.
| # | Institution | % held | Shares | Position date |
|---|---|---|---|---|
| 1 | 7.41% | 27.13M | Position as of Jun 30, 2026 | |
| 2 | 4.10% | 15.02M | Position as of Jun 30, 2026 | |
| 3 | Hudson Bay Capital Management Lp | 3.73% | 13.68M | Position as of Jun 30, 2026 |
| 4 | Driehaus Capital Management, LLC | 3.70% | 13.56M | Position as of Jun 30, 2026 |
| 5 | Two Sigma Investments, LP | 3.49% | 12.78M | Position as of Jun 30, 2026 |
| 6 | 2.77% | 10.15M | Position as of Jun 30, 2026 | |
| 7 | Susquehanna International Group, LLP | 2.64% | 9.68M | Position as of Jun 30, 2026 |
| 8 | 2.34% | 8.59M | Position as of Sep 30, 2026 | |
| 9 | Electron Capital Partners, LLC | 1.82% | 6.68M | Position as of Jun 30, 2026 |
| 10 | Crystal Cove Asset Management, LLC | 1.73% | 6.35M | Position as of Sep 30, 2026 |
Recent insider transactions
Eos Energy Enterprises (EOSE) insider transactions
Provider action descriptions keep buys and sales separate from awards, gifts, conversions, and tax withholding. Transaction window: Jan 22, 2025–Oct 29, 2026 · 102 records.
Source: Yahoo Finance. Transaction dates are not filing dates; original filing links appear only when the provider identifies a specific filing. View current provider table. Browse issuer SEC ownership filings; this lookup is not a match to each row.
| # | Insider | % company | Action | Shares | Price | Value | Transaction date |
|---|---|---|---|---|---|---|---|
| 1 | BUCZKOWSKI MICHELLE Officer | 0.01% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 50.00K | $2.00 | $100,000 | Oct 29, 2026 |
| 2 | BUCZKOWSKI MICHELLE Officer | 0.03% | UnclassifiedThe available record does not identify a purchase, sale, or other action. Do not infer a trade direction.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 100.00K | Not reported | Not reported | Oct 28, 2026 |
| 3 | MASTRANGELO JOE Chief Executive Officer | 0.07% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 250.00K | $3.92 | $980,000 | Sep 16, 2026 |
| 4 | PURI SUMEET Officer | 0.01% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 43.75K | $3.92 | $171,500 | Sep 16, 2026 |
| 5 | SONG HAIYAN Director | <0.01% | PurchaseProvider-reported open-market or direct purchase.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 15.00K | $3.91 | $58,700 | Sep 14, 2026 |
| 6 | MASTRANGELO JOE Chief Executive Officer | 0.14% | UnclassifiedThe available record does not identify a purchase, sale, or other action. Do not infer a trade direction.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 500.00K | Not reported | Not reported | Sep 14, 2026 |
| 7 | PURI SUMEET Officer | 0.02% | UnclassifiedThe available record does not identify a purchase, sale, or other action. Do not infer a trade direction.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 87.50K | Not reported | Not reported | Sep 14, 2026 |
| 8 | PURI SUMEET Officer | <0.01% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 34.17K | $4.13 | $141,110 | Sep 9, 2026 |
| 9 | PURI SUMEET Officer | 0.02% | UnclassifiedThe available record does not identify a purchase, sale, or other action. Do not infer a trade direction.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 68.33K | Not reported | Not reported | Sep 4, 2026 |
| 10 | PURI SUMEET Officer | <0.01% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 29.17K | $3.36 | $98,001 | Jul 28, 2026 |
| 11 | KROEKER NATHAN Officer | 0.03% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 110.42K | $3.36 | $371,001 | Jul 28, 2026 |
| 12 | MASTRANGELO JOE Chief Executive Officer | 0.04% | SaleProvider-reported open-market or direct sale.Transaction context
Position sold = shares sold ÷ (shares sold + holdings after). Separate accounts or security classes may not represent total beneficial ownership. | 159.15K | $3.61 | $574,546 | Jul 27, 2026 |
Frequently asked
Questions about this quote
Who are the largest EOSE shareholders?
Blackrock Inc. is the largest reported institutional holder of EOSE, with 27.13 million shares, or about 7.41% of shares outstanding.
What do the reported institutional positions show for EOSE?
Eos Energy Enterprises has 10 institutional rows on file; the latest displayed position date is Sep 30, 2026. Previous position sizes are unavailable, so increases and reductions cannot be determined.
What insider transactions are available for EOSE?
TECHi shows 102 dated EOSE insider transactions through Oct 29, 2026, with transaction types kept separate so administrative actions are not presented as open-market trades.
Are EOSE insiders buying or selling?
The displayed EOSE activity reads Mixed, sale-heavy: 33 sales and 5 purchases. Other transaction types remain separate.
Who is the most active reported EOSE insider?
MASTRANGELO JOE has the largest absolute share movement in the displayed EOSE insider rows, totaling 3.64 million shares. The action labels provide the transaction context.
What this page answers
Check who owns the float and whether insiders are active.
Explore Institutional concentration, insider transaction pattern, and float context.
Keep in mind Filings are delayed or transactions are administrative rather than economic.
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Next open: 2026-11-11 · 9:30 AM America/New_York
Exchange calendar includes scheduled holidays and early closes. Extended-session prices appear separately only when supplied by the quote source.
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