Eos Energy Enterprises, Inc.

SecurityEOSE / Eos Energy Enterprises, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership355,000 shares
Latest Disclosed Value $ 4,068,300
Alliancebernstein L.p. reports 13.09% increase in ownership of EOSE / Eos Energy Enterprises, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 355,000 shares of Eos Energy Enterprises, Inc. (US:EOSE) valued at $1,760,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 313,900 shares of Eos Energy Enterprises, Inc.. This represents a change in shares of 13.09% during the quarter. The current value of the position is $2,868,400 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 355,000 41,100 13.09 4,068 13.09 0.0013
2026-02-17 2025-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 313,900 -63,900 -16.91 3,597 -16.41 0.0011
2025-11-14 2025-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 377,800 151,400 66.87 4,303 271.27 0.0014
2025-08-14 2025-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 226,400 226,400 1,159 0.0004
2024-08-14 2024-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 0 -59,460 -100.00 0 -100.00
2024-05-14 2024-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 59,460 0 0.00 61 -4.69 0.0000
2024-02-14 2023-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 59,460 0 0.00 65 -49.61 0.0000
2023-11-14 2023-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 59,460 -59,460 -50.00 128 -75.39 0.0001
2023-08-15 2023-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 118,920 118,920 516 0.0002
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.