Telephone and Data Systems, Inc.
US ˙ NYSE ˙ US8794338298

SecurityTDS / Telephone and Data Systems, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership31,715 shares
Latest Disclosed Value $ 1,300,323
Sei Investments Co ownership in TDS / Telephone and Data Systems, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 31,715 shares of Telephone and Data Systems, Inc. (US:TDS) valued at $1,300,315 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 11,465 shares of Telephone and Data Systems, Inc.. This represents a change in shares of 176.62% during the quarter. The current value of the position is $1,242,911 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (TDS) in the form of stock options.

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.

TDS / Telephone and Data Systems, 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)
2026-02-13 2025-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 31,715 20,250 176.62 1,300 189.53
2025-11-13 2025-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 11,465 455 4.13 450 14.83 0.0005
2025-08-14 2025-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 11,010 -2,843 -20.52 392 -27.05 0.0005
2025-05-14 2025-03-31 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 13,853 -50 -0.36 537 13.08 0.0007
2025-05-13 2025-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 13,845 -58 477 0.0005
2025-02-11 2024-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 13,903 -481 -3.34 474 41.92 0.0006
2024-11-12 2024-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 14,384 340 2.42 334 14.78 0.0004
2024-08-13 2024-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 14,044 -3,041 -17.80 291 6.59 0.0004
2024-05-07 2024-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 17,085 64 0.38 274 -12.50 0.0004
2024-02-14 2023-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 17,021 1,190 7.52 312 7.96 0.0005
2023-11-14 2023-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 15,831 5,409 51.90 290 240.00 0.0005
2023-08-11 2023-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 10,422 10,422 86 0.0001
2023-02-10 2022-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 0 -12,010 -100.00 0 -100.00
2022-11-14 2022-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 12,010 -3,562 -22.87 167 -32.11 0.0004
2022-08-15 2022-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 15,572 15,572 246 0.0005
2021-11-12 2021-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 0 -8,943 -100.00 0 -100.00
2021-08-06 2021-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 8,943 -10,343 -53.63 203 -37.15 0.0005
2021-05-12 2021-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 19,286 -71,097 -78.66 323 -80.34 0.0008
2021-02-08 2020-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 90,383 5,425 6.39 1,643 6.90 0.0042
2020-12-04 2020-09-30 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 84,958 2,096 2.53 1,537 -6.17 0.0045
2020-11-06 2020-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 85,230 2,368 1,542 3,712.7932
2020-08-17 2020-06-30 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 82,862 -20,472 -19.81 1,638 -5.43 0.0051
2020-08-11 2020-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 34,535 -68,799 829 2,248.7066
2020-05-14 2020-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 103,334 46,050 80.39 1,732 17.74 0.0064
2020-02-06 2019-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 57,284 -34,235 -37.41 1,471 -37.67 0.0044
2019-11-12 2019-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 91,519 9,960 12.21 2,360 -4.61 0.0060
2019-08-14 2019-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 81,559 -51,879 -38.88 2,474 -39.48 0.0081
2019-05-15 2019-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 133,438 69,637 109.15 4,088 95.69 0.0137
2019-02-13 2018-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 63,801 61,848 3,166.82 2,089 3,164.06 0.0074
2018-11-08 2018-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 1,953 -6,142 -75.87 64 -71.17 0.0002
2018-08-03 2018-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 8,095 5,205 180.10 222 174.07 0.0008
2018-05-11 2018-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 2,890 -606 -17.33 81 -16.49 0.0003
2018-02-08 2017-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 3,496 -1,706 -32.80 97 -33.10 0.0003
2017-11-06 2017-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 5,202 334 6.86 145 7.41 0.0005
2017-07-31 2017-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 4,868 594 13.90 135 18.42 0.0005
2017-05-05 2017-03-31 13F TELEPHONE & DATA SYS COM NEW 879433829 4,274 -1,705 -28.52 114 -34.10 0.0005
2017-02-02 2016-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 5,979 -1,152 -16.15 173 -10.36 0.0008
2016-11-04 2016-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 7,131 2,176 43.92 193 31.29 0.0010
2016-08-11 2016-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 4,955 3,512 243.38 147 241.86 0.0009
2016-05-10 2016-03-31 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 1,443 -173 -10.71 43 2.38 0.0003
2016-02-03 2015-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 1,616 1,391 618.22 42 600.00 0.0003
2015-11-02 2015-09-30 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 225 -143 -38.86 6 -40.00 0.0001
2015-10-30 2015-09-30 13F TELEPHONE & DATA SYS COM NEW 879433829 225 7
2015-08-07 2015-06-30 13F/A-1 TELEFONICA BRASIL PUT 879433829 0 -329 -100.00 0 -100.00
2015-08-07 2015-06-30 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 368 39 11.85 10 66.67 0.0001
2015-08-04 2015-06-30 13F TELEPHONE & DATA SYS COM NEW 879433829 368 39 10 0.0001
2015-05-14 2015-03-31 13F/A-1 TELEPHONE & DATA SYS COM NEW 879433829 329 182 123.81 6 200.00 0.0001
2015-05-01 2015-03-31 13F TELEFONICA BRASIL PUT 879433829 329 329 6 0.0001
2015-02-10 2014-12-31 13F TELEPHONE & DATA SYS COM NEW 879433829 147 147 2 0.0000
Disclosed Put 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
(%)
2015-08-07 2015-06-30 13F/A TELEFONICA BRASIL PUT 0 -100.00 0 -100.00 n/a n/a n/a
2015-05-01 2015-03-31 13F TELEFONICA BRASIL PUT 329 6 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.