Solaris Energy Infrastructure, Inc.
MX ˙ BMV ˙ US83418M1036
SecurityMX:SEI / Solaris Energy Infrastructure, Inc.
InstitutionTwo Sigma Investments, Lp
ManagerJohn Overdeck, David Siegel
Latest Disclosed Ownership1,941,546 shares
Latest Disclosed Value $ 109,716,764
Two Sigma Investments, Lp reports 79.78% increase in ownership of SEI / Solaris Energy Infrastructure, Inc.

On May 15, 2026 - Two Sigma Investments, Lp filed a 13F-HR form disclosing ownership of 1,941,546 shares of Solaris Energy Infrastructure, Inc. (MX:SEI) valued at $109,716,764 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,079,931 shares of Solaris Energy Infrastructure, Inc.. This represents a change in shares of 79.78% 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 1,941,546 861,615 79.78 109,717 121.01 0.0885
2026-02-17 2025-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 1,079,931 72,611 7.21 49,644 23.30 0.0700
2025-11-14 2025-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 1,007,320 474,087 88.91 40,263 166.90 0.0599
2025-08-14 2025-06-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 533,233 200,356 60.19 15,085 108.27 0.0267
2025-05-15 2025-03-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 332,877 120,454 56.70 7,243 18.49 0.0155
2025-02-14 2024-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 212,423 -21,253 -9.10 6,114 105.07 0.0133
2024-11-14 2024-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 233,676 -81,896 -25.95 2,982 10.12 0.0065
2024-08-14 2024-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 315,572 -85,272 -21.27 2,708 -22.10 0.0062
2024-05-15 2024-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 400,844 -112,063 -21.85 3,475 -14.87 0.0082
2024-02-14 2023-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 512,907 350,393 215.61 4,083 135.68 0.0094
2023-11-14 2023-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 162,514 110,576 212.90 1,732 300.93 0.0047
2023-08-14 2023-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 51,938 -23,562 -31.21 433 -32.92 0.0011
2023-05-15 2023-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 75,500 -116,212 -60.62 645 -66.16 0.0018
2023-02-14 2022-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 191,712 45,683 31.28 1,904 39.21 0.0060
2022-11-14 2022-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 146,029 -71,603 -32.90 1,367 -42.27 0.0046
2022-08-15 2022-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 217,632 101,593 87.55 2,368 80.76 0.0078
2022-05-16 2022-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 116,039 116,039 1,310 0.0039
2022-02-14 2021-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 0 -22,800 -100.00 0 -100.00
2021-11-15 2021-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 22,800 8,300 57.24 190 34.75 0.0004
2021-08-16 2021-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 14,500 14,500 141 0.0003
2021-02-16 2020-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 0 -36,800 -100.00 0 -100.00
2020-11-16 2020-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 36,800 36,800 233 0.0008
2018-08-14 2018-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 0 -72,092 -100.00 0 -100.00
2018-05-15 2018-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 72,092 -117,976 -62.07 1,194 -70.66 0.0040
2018-02-14 2017-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 190,068 166,733 714.52 4,069 899.75 0.0132
2017-11-14 2017-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 23,335 23,335 407 0.0014
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.