Tenaris S.A. - Depositary Receipt (Common Stock)
US ˙ NYSE ˙ US88031M1099

SecurityTS / Tenaris S.A. - Depositary Receipt (Common Stock)
InstitutionSei Investments Co
Latest Disclosed Ownership20,232 shares
Latest Disclosed Value $ 777,927
Sei Investments Co reports 12.63% increase in ownership of TS / Tenaris S.A. - Depositary Receipt (Common Stock)

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 20,232 shares of Tenaris S.A. - Depositary Receipt (Common Stock) (US:TS) valued at $777,920 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 17,964 shares of Tenaris S.A. - Depositary Receipt (Common Stock). This represents a change in shares of 12.63% during the quarter. The current value of the position is $1,295,253 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 TENARIS S A SPONSORED ADS 88031M109 20,232 2,268 12.63 778 21.03 0.0008
2025-11-13 2025-09-30 13F TENARIS S A SPONSORED ADS 88031M109 17,964 1,252 7.49 643 2.72 0.0007
2025-08-14 2025-06-30 13F TENARIS S A SPONSORED ADS 88031M109 16,712 1,149 7.38 625 2.80 0.0007
2025-05-14 2025-03-31 13F/A-1 TENARIS S A SPONSORED ADS 88031M109 15,563 2,073 15.37 609 19.45 0.0008
2025-05-13 2025-03-31 13F TENARIS S A SPONSORED ADS 88031M109 13,379 -111 518 0.0006
2025-02-11 2024-12-31 13F TENARIS S A SPONSORED ADS 88031M109 13,490 -6,512 -32.56 510 -19.84 0.0007
2024-11-12 2024-09-30 13F TENARIS S A SPONSORED ADS 88031M109 20,002 -2,452 -10.92 636 -7.30 0.0008
2024-08-13 2024-06-30 13F TENARIS S A SPONSORED ADS 88031M109 22,454 -41,240 -64.75 685 -72.61 0.0010
2024-05-07 2024-03-31 13F TENARIS S A SPONSORED ADS 88031M109 63,694 36,380 133.19 2,501 163.54 0.0037
2024-02-14 2023-12-31 13F TENARIS S A SPONSORED ADS 88031M109 27,314 -9,862 -26.53 949 -19.17 0.0015
2023-11-14 2023-09-30 13F TENARIS S A SPONSORED ADS 88031M109 37,176 14,957 67.32 1,175 76.54 0.0021
2023-08-11 2023-06-30 13F TENARIS S A SPONSORED ADS 88031M109 22,219 10,122 83.67 666 93.88 0.0012
2023-05-12 2023-03-31 13F TENARIS S A SPONSORED ADS 88031M109 12,097 12,097 344 0.0006
2021-08-06 2021-06-30 13F TENARIS S A SPONSORED ADS 88031M109 0 -28,324 -100.00 0 -100.00
2021-05-12 2021-03-31 13F TENARIS S A SPONSORED ADS 88031M109 28,324 13,660 93.15 643 174.79 0.0016
2021-02-08 2020-12-31 13F TENARIS S A SPONSORED ADS 88031M109 14,664 -31,196 -68.02 234 -48.23 0.0006
2020-12-04 2020-09-30 13F/A-1 TENARIS S A SPONSORED ADS 88031M109 45,860 -6,190 -11.89 452 -32.84 0.0013
2020-11-06 2020-09-30 13F TENARIS S A SPONSORED ADS 88031M109 53,262 1,212 525 1,264.0833
2020-08-17 2020-06-30 13F/A-1 TENARIS S A SPONSORED ADS 88031M109 52,050 13,221 34.05 673 43.80 0.0021
2020-08-11 2020-06-30 13F TENARIS S A SPONSORED ADS 88031M109 45,207 6,378 991 2,688.1403
2020-05-14 2020-03-31 13F TENARIS S A SPONSORED ADS 88031M109 38,829 -3,105 -7.40 468 -50.68 0.0017
2020-02-06 2019-12-31 13F TENARIS S A SPONSORED ADS 88031M109 41,934 3,158 8.14 949 15.59 0.0028
2019-11-12 2019-09-30 13F TENARIS S A SPONSORED ADS 88031M109 38,776 -9,297 -19.34 821 -35.10 0.0021
2019-08-14 2019-06-30 13F TENARIS S A SPONSORED ADS 88031M109 48,073 106 0.22 1,265 -6.64 0.0041
2019-05-15 2019-03-31 13F TENARIS S A SPONSORED ADS 88031M109 47,967 6,983 17.04 1,355 -1.17 0.0046
2019-02-13 2018-12-31 13F TENARIS S A SPONSORED ADR 88031M109 40,984 -8,222 -16.71 1,371 -17.11 0.0049
2018-11-08 2018-09-30 13F TENARIS S A SPONSORED ADR 88031M109 49,206 -25,149 -33.82 1,654 -38.88 0.0060
2018-08-03 2018-06-30 13F TENARIS S A SPONSORED ADR 88031M109 74,355 11,595 18.48 2,706 24.36 0.0092
2018-05-11 2018-03-31 13F TENARIS S A SPONSORED ADR 88031M109 62,760 22,858 57.29 2,176 71.20 0.0083
2018-02-08 2017-12-31 13F TENARIS S A SPONSORED ADR 88031M109 39,902 8,726 27.99 1,271 43.94 0.0044
2017-11-06 2017-09-30 13F TENARIS S A SPONSORED ADR 88031M109 31,176 6,113 24.39 883 13.06 0.0031
2017-07-31 2017-06-30 13F TENARIS S A SPONSORED ADR 88031M109 25,063 -203,113 -89.02 781 -89.97 0.0031
2017-05-05 2017-03-31 13F TENARIS S A SPONSORED ADR 88031M109 228,176 2,395 1.06 7,790 -3.39 0.0341
2017-02-02 2016-12-31 13F TENARIS S A SPONSORED ADR 88031M109 225,781 181,281 407.37 8,063 537.90 0.0390
2016-11-04 2016-09-30 13F TENARIS S A SPONSORED ADR 88031M109 44,500 17,748 66.34 1,264 63.94 0.0064
2016-08-11 2016-06-30 13F TENARIS S A SPONSORED ADR 88031M109 26,752 -34,858 -56.58 771 -49.44 0.0046
2016-05-10 2016-03-31 13F/A-1 TENARIS S A SPONSORED ADR 88031M109 61,610 61,577 186,596.97 1,525 152,400.00 0.0095
2016-02-03 2015-12-31 13F TENARIS S A SPONSORED ADR 88031M109 33 -77 -70.00 1 -50.00 0.0000
2015-11-02 2015-09-30 13F/A-1 TENARIS S A SPONSORED ADR 88031M109 110 9 8.91 2 0.00 0.0000
2015-10-30 2015-09-30 13F DIREXION SHS ETF TR SPONSORED ADR 88031M109 110 4
2015-08-07 2015-06-30 13F/A-1 TENARIS S A SPONSORED ADR 88031M109 101 15 17.44 2 0.00 0.0000
2015-08-04 2015-06-30 13F TENARIS S A SPONSORED ADR 88031M109 101 15 2 0.0000
2015-05-14 2015-03-31 13F/A-1 TENARIS S A SPONSORED ADR 88031M109 86 28 48.28 2 100.00 0.0000
2015-05-01 2015-03-31 13F TENARIS S A SPONSORED ADR 88031M109 86 2
2015-02-10 2014-12-31 13F TENARIS S A SPONSORED ADR 88031M109 58 58 1 0.0000
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.