Eos Energy Enterprises, Inc.

SecurityEOSE / Eos Energy Enterprises, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership125,386 shares
Latest Disclosed Value $ 621,911
Advisor Group Holdings, Inc. reports 1.49% increase in ownership of EOSE / Eos Energy Enterprises, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 125,386 shares of Eos Energy Enterprises, Inc. (US:EOSE) valued at $621,915 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 123,543 shares of Eos Energy Enterprises, Inc.. This represents a change in shares of 1.49% during the quarter. The current value of the position is $1,028,165 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 125,386 1,843 1.49 622 -56.11 0.0005
2026-02-17 2025-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 123,543 29,299 31.09 1,416 49.42 0.0021
2025-11-14 2025-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 94,244 45,061 91.62 948 277.29 0.0013
2025-09-04 2025-06-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 49,183 -29,838 -37.76 252 -15.77 0.0004
2025-08-13 2025-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 11,159 -67,862 56 0.0001
2025-05-12 2025-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 79,021 31,412 65.98 299 29.00 0.0007
2025-06-06 2024-12-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 47,609 4,750 11.08 231 81.89 0.0005
2025-02-07 2024-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 48,859 6,000 223 0.0006
2024-11-13 2024-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 42,859 29,900 230.73 127 693.75 0.0003
2024-08-13 2024-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 12,959 4,359 50.69 16 100.00 0.0000
2024-05-10 2024-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 8,600 5,000 138.89 9 166.67 0.0000
2024-02-12 2023-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 3,600 -4,412 -55.07 4 -82.35 0.0000
2023-11-13 2023-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 8,012 4,400 121.82 17 13.33 0.0000
2023-08-21 2023-06-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 3,612 -1,588 -30.54 16 15.38 0.0000
2023-08-10 2023-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 3,612 -1,588 16 0.0000
2023-05-12 2023-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 5,200 -2,762 -34.69 13 18.18 0.0000
2023-02-10 2022-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 7,962 -305 -3.69 11 -21.43 0.0000
2022-11-14 2022-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 8,267 3,730 82.21 14 180.00 0.0000
2022-08-10 2022-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 4,537 -15,125 -76.93 5 -93.90 0.0000
2022-05-04 2022-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 19,662 17,695 899.59 82 446.67 0.0002
2022-02-03 2021-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 1,967 -1,674 -45.98 15 -70.00 0.0000
2021-11-05 2021-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 3,641 -1,571 -30.14 50 -46.81 0.0001
2021-08-02 2021-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 5,212 -11,789 -69.34 94 -71.86 0.0002
2021-05-13 2021-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 17,001 3,351 24.55 334 17.61 0.0008
2021-02-10 2020-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 13,650 13,650 284 0.0008
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.