이오스 에너지 엔터프라이즈, Inc.

SecurityEOSE / Eos Energy Enterprises, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership2,960,784 shares
Latest Disclosed Value $ 14,685,490
Morgan Stanley reports 9.45% decrease in ownership of EOSE / Eos Energy Enterprises, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 2,960,784 shares of Eos Energy Enterprises, Inc. (US:EOSE) valued at $14,685,489 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 3,269,699 shares of Eos Energy Enterprises, Inc.. This represents a change in shares of -9.45% during the quarter. The current value of the position is $20,962,351 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 2,960,784 -308,915 -9.45 14,685 -60.81 0.0009
2026-05-27 2025-12-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 3,269,699 -1,031,553 -23.98 37,471 -23.52 0.0022
2026-02-13 2025-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 3,269,699 -1,031,553 37,471 0.0022
2026-05-27 2025-09-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 4,301,252 48,590 1.14 48,991 125.01 0.0030
2025-11-14 2025-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 4,301,252 48,590 48,991 0.0030
2025-08-15 2025-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 4,252,662 2,791,740 191.09 21,774 294.30 0.0014
2025-05-15 2025-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 1,460,922 245,985 20.25 5,522 -6.47 0.0004
2025-05-15 2024-12-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 1,214,937 683,974 128.82 5,905 274.62 0.0004
2025-02-14 2024-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 1,214,937 683,974 5,905 0.0004
2025-05-14 2024-09-30 13F/A-2 EOS ENERGY ENTERPRISES COM CL A 29415C101 530,963 -140,143 -20.88 1,577 84.98 0.0001
2025-02-14 2024-09-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 530,963 -140,143 1,577 0.0001
2024-11-14 2024-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 530,963 -140,143 1,577 0.0000
2025-05-14 2024-06-30 13F/A-2 EOS ENERGY ENTERPRISES COM CL A 29415C101 671,106 71,541 11.93 852 38.09 0.0001
2024-10-17 2024-06-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 671,106 71,541 852 0.0001
2024-08-14 2024-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 671,106 71,541 852 0.0001
2024-10-17 2024-03-31 13F/A-2 EOS ENERGY ENTERPRISES COM CL A 29415C101 599,565 -144,092 -19.38 618 -23.83 0.0000
2024-08-16 2024-03-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 599,565 -144,092 618 0.0000
2024-05-15 2024-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 599,565 -144,092 618 0.0000
2024-08-16 2023-12-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 743,657 480,674 182.78 811 43.36 0.0001
2024-02-13 2023-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 743,657 480,674 811 0.0001
2023-11-15 2023-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 262,983 -2,668,407 -91.03 565 -95.56 0.0001
2023-08-14 2023-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 2,931,390 2,606,750 802.97 12,722 1,425.42 0.0013
2023-05-15 2023-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 324,640 302,630 1,374.97 834 2,506.25 0.0001
2023-02-14 2022-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 22,010 -23,732 -51.88 33 -58.97 0.0000
2022-11-14 2022-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 45,742 -301,079 -86.81 78 -81.43 0.0000
2022-10-27 2022-06-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 346,821 330,117 1,976.28 420 500.00 0.0001
2022-08-15 2022-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 346,821 330,117 420 0.0000
2022-10-27 2022-03-31 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 16,704 -13,627 -44.93 70 -69.16 0.0000
2022-05-13 2022-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 16,704 -13,627 70 0.0000
2022-02-14 2021-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 30,331 4,348 16.73 227 -37.64 0.0000
2021-11-15 2021-09-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 25,983 -63,562 -70.98 364 -77.36 0.0000
2021-08-23 2021-06-30 13F/A-1 EOS ENERGY ENTERPRISES COM CL A 29415C101 89,545 12,625 16.41 1,608 6.00 0.0002
2021-08-16 2021-06-30 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 89,545 12,625 1,608 0.0000
2021-05-17 2021-03-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 76,920 11,380 17.36 1,517 11.05 0.0002
2021-02-16 2020-12-31 13F EOS ENERGY ENTERPRISES COM CL A 29415C101 65,540 65,540 1,366 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.