Solaris Energy Infrastructure, Inc.
MX ˙ BMV ˙ US83418M1036
SecurityMX:SEI / Solaris Energy Infrastructure, Inc.
InstitutionRussell Investments Group, Ltd.
Latest Disclosed Ownership257,628 shares
Latest Disclosed Value $ 14,558,621
Russell Investments Group, Ltd. reports 3.91% decrease in ownership of SEI / Solaris Energy Infrastructure, Inc.

On May 8, 2026 - Russell Investments Group, Ltd. filed a 13F-HR form disclosing ownership of 257,628 shares of Solaris Energy Infrastructure, Inc. (MX:SEI) valued at $14,558,621 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 268,118 shares of Solaris Energy Infrastructure, Inc.. This represents a change in shares of -3.91% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 257,628 -10,490 -3.91 14,559 18.12 0.0156
2026-02-17 2025-12-31 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 268,118 31,710 13.41 12,325 30.44 0.0134
2025-11-13 2025-09-30 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 236,408 113,848 92.89 9,449 172.54 0.0107
2025-08-13 2025-06-30 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 122,560 44,681 57.37 3,467 104.66 0.0044
2025-05-13 2025-03-31 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 77,879 604 0.78 1,695 -23.80 0.0023
2025-02-13 2024-12-31 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 77,275 21,585 38.76 2,224 213.10 0.0031
2024-11-13 2024-09-30 13F SOLARIS ENERGY INFRASTRUCTURE Common Stock 83418M103 55,690 130 0.23 711 49.16 0.0010
2024-08-08 2024-06-30 13F SOLARIS OILFIELD INFRASTRUCTURE Common Stock 83418M103 55,560 -46 -0.08 477 -1.24 0.0008
2024-05-08 2024-03-31 13F SOLARIS OILFIELD INFRASTRUCTURE Common Stock 83418M103 55,606 -238,844 -81.12 482 -79.43 0.0008
2024-02-05 2023-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 294,450 -781,046 -72.62 2,344 -79.56 0.0042
2023-11-13 2023-09-30 13F SOLARIS OILFIELD INFRASTRUCTUR COM CL A Common Stock 83418M103 1,075,496 -166,418 -13.40 11,465 10.82 0.0227
2023-08-10 2023-06-30 13F SOLARIS OILFIELD INFRASTRUCTUR COM CL A Common Stock 83418M103 1,241,914 122,831 10.98 10,345 8.26 0.0200
2023-05-09 2023-03-31 13F SOLARIS OILFIELD INFRASTRUCTUR COM CL A Common Stock 83418M103 1,119,083 -31,929 -2.77 9,557 -16.39 0.0187
2023-02-08 2022-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 1,151,012 9,927 0.87 11,430 7.04 0.0235
2022-11-04 2022-09-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 1,141,085 -84,801 -6.92 10,677 -19.93 0.0235
2022-07-29 2022-06-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 1,225,886 245,487 25.04 13,335 20.52 0.0272
2022-05-05 2022-03-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 980,399 404,445 70.22 11,065 193.50 0.0192
2022-01-21 2021-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 575,954 267,896 86.96 3,770 46.86 0.0060
2021-11-08 2021-09-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 308,058 17,473 6.01 2,567 -9.26 0.0043
2021-08-04 2021-06-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 290,585 267,506 1,159.09 2,829 899.65 0.0047
2021-05-10 2021-03-31 13F SOLARIS OILFIELD INFRAST Common Stock 83418M103 23,079 0 0.00 283 51.34 0.0005
2021-02-08 2020-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 23,079 0 0.00 187 28.08 0.0004
2020-11-09 2020-09-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 23,079 -230,165 -90.89 146 -92.22 0.0003
2020-08-05 2020-06-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 253,244 247,558 4,353.82 1,877 6,372.41 0.0042
2020-05-06 2020-03-31 13F/A-1 SOLARIS OILFIELD INFRAST Common Stock 83418M103 5,686 -2,402,440 -99.76 29 -99.91 0.0001
2020-05-06 2020-03-31 13F SOLARIS OILFIELD INFRAST Common Stock 83418M103 5,686 -2,402,440 29 15.8386
2020-01-29 2019-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 2,408,126 1,167,943 94.18 33,718 102.58 0.0628
2019-11-01 2019-09-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 1,240,183 430,746 53.22 16,644 37.26 0.0323
2019-08-09 2019-06-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 809,437 476,191 142.89 12,126 121.32 0.0226
2019-05-13 2019-03-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 333,246 -893,756 -72.84 5,479 -63.06 0.0101
2019-02-11 2018-12-31 13F Solaris Oilfield Infrastructure Common Stock 83418M103 1,227,002 457,020 59.35 14,831 1.99 0.0332
2018-10-26 2018-09-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 769,982 -93,086 -10.79 14,541 17.93 0.0276
2018-08-08 2018-06-30 13F Solaris Oilfield Infrastructure Common Stock 83418M103 863,068 678,610 367.89 12,330 303.73 0.0257
2018-05-11 2018-03-31 13F SOLARIS OILFIELD INFRSTR INC COM CL A Common Stocks 83418M103 184,458 153,108 488.38 3,054 349.12 0.0052
2018-02-06 2017-12-31 13F SOLARIS OILFIELD INFRSTR INC COM CL A Common Stocks 83418M103 31,350 31,350 680 0.0011
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.