Tronox Holdings plc
US ˙ NYSE ˙ GB00BJT16S69

SecurityTROX / Tronox Holdings plc
InstitutionSei Investments Co
Latest Disclosed Ownership54,495 shares
Latest Disclosed Value $ 227,243
Sei Investments Co ownership in TROX / Tronox Holdings plc

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 54,495 shares of Tronox Holdings plc (US:TROX) valued at $227,244 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Tronox Holdings plc. The current value of the position is $425,606 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.

Upgrade to unlock premium data and export to Excel .

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 TRONOX HOLDINGS SHS G9087Q102 54,495 54,495 227 0.0002
2025-11-13 2025-09-30 13F TRONOX HOLDINGS SHS G9087Q102 0 -27,175 -100.00 0 -100.00
2025-08-14 2025-06-30 13F TRONOX HOLDINGS SHS G9087Q102 27,175 -291,426 -91.47 138 -93.89 0.0002
2025-05-14 2025-03-31 13F/A-1 TRONOX HOLDINGS SHS G9087Q102 318,601 34,248 12.04 2,243 -21.69 0.0029
2025-05-13 2025-03-31 13F TRONOX HOLDINGS SHS G9087Q102 283,375 -978 2,849 0.0031
2025-02-11 2024-12-31 13F TRONOX HOLDINGS SHS G9087Q102 284,353 81,078 39.89 2,863 -3.70 0.0037
2024-11-12 2024-09-30 13F TRONOX HOLDINGS SHS G9087Q102 203,275 -60,647 -22.98 2,974 -28.19 0.0039
2024-08-13 2024-06-30 13F TRONOX HOLDINGS SHS G9087Q102 263,922 -38,994 -12.87 4,141 -21.22 0.0059
2024-05-07 2024-03-31 13F TRONOX HOLDINGS SHS G9087Q102 302,916 -8,238 -2.65 5,256 19.30 0.0077
2024-02-14 2023-12-31 13F TRONOX HOLDINGS SHS G9087Q102 311,154 14,732 4.97 4,406 10.60 0.0071
2023-11-14 2023-09-30 13F TRONOX HOLDINGS SHS G9087Q102 296,422 24,675 9.08 3,984 15.35 0.0072
2023-08-11 2023-06-30 13F TRONOX HOLDINGS SHS G9087Q102 271,747 15,971 6.24 3,454 -6.12 0.0060
2023-05-12 2023-03-31 13F TRONOX HOLDINGS SHS G9087Q102 255,776 42,801 20.10 3,678 26.00 0.0068
2023-02-10 2022-12-31 13F TRONOX HOLDINGS SHS G9087Q102 212,975 1,879 0.89 2,920 12.88 0.0065
2022-11-14 2022-09-30 13F TRONOX HOLDINGS SHS G9087Q102 211,096 -10,971 -4.94 2,586 -31.28 0.0058
2022-08-15 2022-06-30 13F TRONOX HOLDINGS SHS G9087Q102 222,067 7,738 3.61 3,763 -12.04 0.0081
2022-05-13 2022-03-31 13F TRONOX HOLDINGS SHS G9087Q102 214,329 11,667 5.76 4,278 -12.50 0.0086
2022-02-14 2021-12-31 13F TRONOX HOLDINGS SHS G9087Q102 202,662 -12,852 -5.96 4,889 -8.26 0.0092
2021-11-12 2021-09-30 13F TRONOX HOLDINGS SHS G9087Q102 215,514 203 0.09 5,329 9.97 0.0112
2021-08-06 2021-06-30 13F TRONOX HOLDINGS SHS G9087Q102 215,311 -2,983 -1.37 4,846 22.00 0.0107
2021-05-12 2021-03-31 13F TRONOX HOLDINGS SHS G9087Q102 218,294 1,229 0.57 3,972 23.55 0.0100
2021-02-08 2020-12-31 13F TRONOX HOLDINGS SHS G9087Q102 217,065 86,798 66.63 3,215 230.76 0.0083
2020-12-04 2020-09-30 13F/A-1 TRONOX HOLDINGS SHS G9087Q102 130,267 29,356 29.09 972 33.33 0.0028
2020-11-06 2020-09-30 13F TRONOX HOLDINGS SHS G9087Q102 134,251 33,340 1,003 2,415.0010
2020-08-17 2020-06-30 13F/A-1 TRONOX HOLDINGS SHS G9087Q102 100,911 9,451 10.33 729 60.22 0.0023
2020-08-11 2020-06-30 13F TRONOX HOLDINGS SHS G9087Q102 91,392 -68 1,044 2,831.9056
2020-05-14 2020-03-31 13F TRONOX HOLDINGS SHS G9087Q102 91,460 68 0.07 455 -56.42 0.0017
2020-02-06 2019-12-31 13F TRONOX HOLDINGS SHS G9087Q102 91,392 -5,036 -5.22 1,044 30.50 0.0031
2019-11-12 2019-09-30 13F TRONOX HOLDINGS SHS G9087Q102 96,428 4,981 5.45 800 -31.57 0.0020
2019-08-14 2019-06-30 13F TRONOX HOLDINGS SHS G9087Q102 91,447 12,212 15.41 1,169 12.19 0.0038
2019-05-15 2019-03-31 13F TRONOX HOLDINGS S3 G9087Q102 79,235 79,235 1,042 0.0035
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.