Solaris Energy Infrastructure, Inc.
MX ˙ BMV ˙ US83418M1036
SecurityMX:SEI / Solaris Energy Infrastructure, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership1,707,455 shares
Latest Disclosed Value $ 96,488,360
Morgan Stanley reports 18.36% decrease in ownership of SEI / Solaris Energy Infrastructure, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 1,707,455 shares of Solaris Energy Infrastructure, Inc. (MX:SEI) valued at $96,488,360 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 2,091,364 shares of Solaris Energy Infrastructure, Inc.. This represents a change in shares of -18.36% during the quarter.

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 SOLARIS ENERGY INFRAS COM CL A 83418M103 1,707,455 -383,909 -18.36 96,488 0.36 0.0058
2026-05-27 2025-12-31 13F/A-1 SOLARIS ENERGY INFRAS COM CL A 83418M103 2,091,364 199,825 10.56 96,140 27.16 0.0057
2026-02-13 2025-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 2,091,364 199,825 96,140 0.0057
2026-05-27 2025-09-30 13F/A-1 SOLARIS ENERGY INFRAS COM CL A 83418M103 1,891,539 307,300 19.40 75,605 68.69 0.0046
2025-11-14 2025-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 1,891,539 307,300 75,605 0.0046
2025-08-15 2025-06-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 1,584,239 981,726 162.94 44,818 241.86 0.0029
2025-05-15 2025-03-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 602,513 -128,998 -17.63 13,111 -37.73 0.0009
2025-05-15 2024-12-31 13F/A-1 SOLARIS ENERGY INFRAS COM CL A 83418M103 731,511 119,683 19.56 21,053 169.69 0.0015
2025-02-14 2024-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 731,511 119,683 21,053 0.0015
2025-05-14 2024-09-30 13F/A-2 SOLARIS ENERGY INFRAS COM CL A 83418M103 611,828 -318,991 -34.27 7,807 -2.25 0.0006
2025-02-14 2024-09-30 13F/A-1 SOLARIS ENERGY INFRAS COM CL A 83418M103 611,828 -318,991 7,807 0.0006
2024-11-14 2024-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 611,828 -318,991 7,807 0.0006
2025-05-14 2024-06-30 13F/A-2 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 930,819 -515,753 -35.65 7,986 -36.32 0.0006
2024-10-17 2024-06-30 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 930,819 -515,753 7,986 0.0006
2024-08-14 2024-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 930,819 -515,753 7,986 0.0006
2024-10-17 2024-03-31 13F/A-2 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 1,446,572 899,793 164.56 12,542 188.17 0.0010
2024-08-16 2024-03-31 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 1,446,572 899,793 12,542 0.0001
2024-05-15 2024-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 1,446,572 899,793 12,542 0.0010
2024-08-16 2023-12-31 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 546,779 177,963 48.25 4,352 10.71 0.0004
2024-02-13 2023-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 546,779 177,963 4,352 0.0004
2023-11-15 2023-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 368,816 34,202 10.22 3,932 41.05 0.0004
2023-08-14 2023-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 334,614 54,028 19.26 2,787 16.32 0.0003
2023-05-15 2023-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 280,586 15,346 5.79 2,396 -9.00 0.0003
2023-02-14 2022-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 265,240 -21,163 -7.39 2,634 -1.83 0.0003
2022-11-14 2022-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 286,403 11,343 4.12 2,682 -10.39 0.0004
2022-10-27 2022-06-30 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 275,060 195,225 244.54 2,993 232.19 0.0004
2022-08-15 2022-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 275,060 195,225 2,993 0.0001
2022-10-27 2022-03-31 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 79,835 -13,784 -14.72 901 46.74 0.0001
2022-05-13 2022-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 79,835 -13,784 901 0.0001
2022-02-14 2021-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 93,619 -5,138 -5.20 614 -25.49 0.0001
2021-11-15 2021-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 98,757 -90,400 -47.79 824 -55.27 0.0001
2021-08-23 2021-06-30 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 189,157 135,976 255.69 1,842 182.52 0.0002
2021-08-16 2021-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 189,157 135,976 1,842 0.0001
2021-05-17 2021-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 53,181 -437,368 -89.16 652 -83.67 0.0001
2021-02-16 2020-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 490,549 230,967 88.98 3,993 142.59 0.0006
2020-11-13 2020-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 259,582 178,869 221.61 1,646 174.79 0.0003
2020-08-14 2020-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 80,713 -154,438 -65.68 599 -51.46 0.0001
2020-05-26 2020-03-31 13F/A-1 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 235,151 16,161 7.38 1,234 -59.75 0.0003
2020-05-15 2020-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 235,151 16,161 1,234 94.7969
2020-02-14 2019-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 218,990 72,027 49.01 3,066 55.56 0.0007
2019-11-14 2019-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 146,963 47,938 48.41 1,971 33.00 0.0005
2019-08-14 2019-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 99,025 10,247 11.54 1,482 1.51 0.0004
2019-05-15 2019-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 88,778 43,213 94.84 1,460 164.97 0.0004
2019-02-14 2018-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 45,565 -35,897 -44.07 551 -64.17 0.0002
2019-04-23 2018-09-30 13F/A-2 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 81,462 -109,529 -57.35 1,538 -43.64 0.0004
2018-11-20 2018-09-30 13F/A-1 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 81,462 0 1,538 0.0004
2018-11-14 2018-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 81,462 -109,529 1,538
2019-04-23 2018-06-30 13F/A-1 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 190,991 93,624 96.16 2,729 69.19 0.0007
2018-08-14 2018-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 190,991 93,624 2,729
2019-04-23 2018-03-31 13F/A-1 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 97,367 -69,292 -41.58 1,613 -54.79 0.0004
2018-05-14 2018-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 97,367 -69,292 1,613
2019-04-23 2017-12-31 13F/A-1 SOLARIS OILFIELD INFRSTR COM CL A 83418M103 166,659 113,738 214.92 3,568 286.98 0.0010
2018-02-14 2017-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 166,659 113,738 3,568
2017-11-14 2017-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 52,921 38,750 273.45 922 462.20 0.0003
2017-08-11 2017-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 14,171 14,171 164 0.0000
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.