Solaris Energy Infrastructure, Inc.
MX ˙ BMV ˙ US83418M1036
SecurityMX:SEI / Solaris Energy Infrastructure, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership172,914 shares
Latest Disclosed Value $ 9,771,370
Citigroup Inc ownership in SEI / Solaris Energy Infrastructure, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 172,914 shares of Solaris Energy Infrastructure, Inc. (MX:SEI) valued at $9,771,370 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 315,476 shares of Solaris Energy Infrastructure, Inc.. This represents a change in shares of -45.19% during the quarter.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (SEI) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:SEI / Solaris Energy Infrastructure, Inc. Historical Put/Call Ratio
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)
2026-05-11 2026-03-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 172,914 -142,562 -45.19 9,771 -32.62 0.0021
2026-02-13 2025-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 315,476 203,626 182.05 14,502 224.43 0.0064
2025-11-10 2025-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 111,850 -1,159 -1.03 4,471 39.82 0.0020
2025-08-11 2025-06-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 113,009 -51,307 -31.22 3,197 -10.57 0.0016
2025-05-12 2025-03-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 164,316 129,274 368.91 3,576 254.66 0.0018
2025-02-12 2024-12-31 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 35,042 14,852 73.56 1,009 292.22 0.0006
2024-11-12 2024-09-30 13F SOLARIS ENERGY INFRAS COM CL A 83418M103 20,190 3,937 24.22 258 84.89 0.0001
2024-08-12 2024-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 16,253 8,897 120.95 139 120.63 0.0001
2024-05-10 2024-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 7,356 2,454 50.06 64 61.54 0.0000
2024-02-09 2023-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 4,902 4,645 1,807.39 39 1,850.00 0.0000
2023-12-06 2023-09-30 13F/A-1 SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 257 -9,600 -97.39 3 -97.56 0.0000
2023-11-09 2023-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 257 -9,600 3 0.0000
2023-08-10 2023-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 9,857 9,857 82 0.0001
2023-05-11 2023-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 0 -213 -100.00 0 -100.00
2023-02-09 2022-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 213 -265 -55.44 2 -50.00 0.0000
2022-11-10 2022-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 478 -1,578 -76.75 4 -81.82 0.0000
2022-08-10 2022-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 2,056 770 59.88 22 46.67 0.0000
2022-05-12 2022-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 1,286 -6,683 -83.86 15 -71.15 0.0000
2022-02-10 2021-12-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 7,969 4,462 127.23 52 79.31 0.0000
2021-11-10 2021-09-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 3,507 -1,426 -28.91 29 -39.58 0.0000
2021-08-10 2021-06-30 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 4,933 -494 -9.10 48 -28.36 0.0000
2021-05-13 2021-03-31 13F SOLARIS OILFIELD INFRASTRUCT COM CL A 83418M103 5,427 -3,572 -39.69 67 -8.22 0.0000
2021-02-11 2020-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 8,999 4,153 85.70 73 135.48 0.0000
2020-11-12 2020-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 4,846 -2,537 -34.36 31 -43.64 0.0000
2020-08-12 2020-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 7,383 -5,553 -42.93 55 -19.12 0.0000
2020-05-12 2020-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 12,936 5,773 80.59 68 -32.00 0.0001
2020-02-12 2019-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 7,163 5,214 267.52 100 284.62 0.0001
2019-11-08 2019-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 1,949 -4,298 -68.80 26 -72.34 0.0000
2019-08-12 2019-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 6,247 -443,484 -98.61 94 -98.73 0.0001
2019-05-13 2019-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 449,731 184,636 69.65 7,394 130.70 0.0071
2019-02-12 2018-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 265,095 94,800 55.67 3,205 -0.37 0.0032
2018-11-13 2018-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 170,295 -15,601 -8.39 3,217 21.08 0.0029
2018-08-10 2018-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 185,896 185,291 30,626.61 2,657 26,470.00 0.0024
2018-05-11 2018-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 605 -1,704 -73.80 10 -79.59 0.0000
2018-02-12 2017-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 2,309 -3,797 -62.18 49 -53.77 0.0000
2017-11-13 2017-09-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 6,106 6,062 13,777.27 106 10,500.00 0.0001
2017-08-11 2017-06-30 13F SOLARIS OILFIELD INFRSTR COM CL A 83418M103 44 44 1 0.0000
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2018-05-11 2018-03-31 13F SOLARIS OILFIELD INFRSTR COM CL A Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-02-12 2017-12-31 13F SOLARIS OILFIELD INFRSTR COM CL A Call 219,400 4,697 n/a n/a n/a
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.