Optimum Communications, Inc.
US ˙ NYSE ˙ US02156K1034

SecurityOPTU / Optimum Communications, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership31,173 shares
Latest Disclosed Value $ 51,435
Sei Investments Co ownership in OPTU / Optimum Communications, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 31,173 shares of Optimum Communications, Inc. (US:OPTU) valued at $51,435 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 31,173 shares of Optimum Communications, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $33,979 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)
2026-02-13 2025-12-31 13F OPTIMUM COMMUNICATIONS CL A 02156K103 31,173 0 0.00 51 -32.00 0.0001
2025-11-13 2025-09-30 13F ALTICE USA CL A 02156K103 31,173 0 0.00 75 13.64 0.0001
2025-08-14 2025-06-30 13F ALTICE USA CL A 02156K103 31,173 31,173 67 0.0001
2023-08-11 2023-06-30 13F ALTICE USA CL A 02156K103 0 -55,254 -100.00 0 -100.00
2023-05-12 2023-03-31 13F ALTICE USA CL A 02156K103 55,254 35,489 179.55 189 108.89 0.0004
2023-02-10 2022-12-31 13F ALTICE USA CL A 02156K103 19,765 -81,084 -80.40 91 -84.69 0.0002
2022-11-14 2022-09-30 13F ALTICE USA CL A 02156K103 100,849 -73,213 -42.06 588 -63.41 0.0013
2022-08-15 2022-06-30 13F ALTICE USA CL A 02156K103 174,062 53,202 44.02 1,607 6.56 0.0035
2022-05-13 2022-03-31 13F ALTICE USA CL A 02156K103 120,860 -1,518 -1.24 1,508 -23.80 0.0030
2022-02-14 2021-12-31 13F ALTICE USA CL A 02156K103 122,378 -31,188 -20.31 1,979 -37.90 0.0037
2021-11-12 2021-09-30 13F ALTICE USA CL A 02156K103 153,566 -77,391 -33.51 3,187 -59.60 0.0067
2021-08-06 2021-06-30 13F ALTICE USA CL A 02156K103 230,957 216,676 1,517.23 7,889 1,331.76 0.0175
2021-05-12 2021-03-31 13F ALTICE USA CL A 02156K103 14,281 0 0.00 551 0.00 0.0014
2021-02-08 2020-12-31 13F ALTICE USA CL A 02156K103 14,281 -16,525 -53.64 551 -31.21 0.0014
2020-12-04 2020-09-30 13F/A-1 ALTICE USA CL A 02156K103 30,806 -24,082 -43.87 801 -33.97 0.0023
2020-11-06 2020-09-30 13F ALTICE USA CL A 02156K103 30,806 -24,082 801 1,928.6299
2020-08-17 2020-06-30 13F/A-1 ALTICE USA CL A 02156K103 54,888 25,780 88.57 1,213 85.47 0.0038
2020-08-11 2020-06-30 13F ALTICE USA CL A 02156K103 132,973 103,865 3,348 9,081.6282
2020-05-14 2020-03-31 13F ALTICE USA CL A 02156K103 29,108 -79,991 -73.32 654 -78.06 0.0024
2020-02-06 2019-12-31 13F ALTICE USA CL A 02156K103 109,099 6,127 5.95 2,981 0.64 0.0089
2019-11-12 2019-09-30 13F ALTICE USA CL A 02156K103 102,972 34,680 50.78 2,962 78.11 0.0076
2019-08-14 2019-06-30 13F ALTICE USA CL A 02156K103 68,292 68,292 1,663 0.0054
2019-05-15 2019-03-31 13F ALTICE USA CL A 02156K103 0 -6,962 -100.00 0 -100.00
2019-02-13 2018-12-31 13F ALTICE USA CL A 02156K103 6,962 0 0.00 126 0.00 0.0004
2018-11-08 2018-09-30 13F ALTICE USA CL A 02156K103 6,962 -96,757 -93.29 126 -92.88 0.0005
2018-08-03 2018-06-30 13F ALTICE USA CL A 02156K103 103,719 60,768 141.48 1,769 122.80 0.0060
2018-05-11 2018-03-31 13F ALTICE USA CL A 02156K103 42,951 251 0.59 794 -12.46 0.0030
2018-02-08 2017-12-31 13F ALTICE USA CL A 02156K103 42,700 -13,432 -23.93 907 -40.83 0.0031
2017-11-06 2017-09-30 13F ALTICE USA CL A 02156K103 56,132 -79,152 -58.51 1,533 -64.92 0.0054
2017-07-31 2017-06-30 13F ALTICE USA CL A 02156K103 135,284 135,284 4,370 0.0174
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.