LyondellBasell Industries N.V.
US ˙ NYSE

SecurityLYB / LyondellBasell Industries N.V.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,530,275 shares
Latest Disclosed Value $ 123,324,998
Dimensional Fund Advisors Lp reports 16.71% decrease in ownership of LYB / LyondellBasell Industries N.V.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,530,275 shares of LyondellBasell Industries N.V. (US:LYB) valued at $123,278,954 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,837,253 shares of LyondellBasell Industries N.V.. This represents a change in shares of -16.71% during the quarter. The current value of the position is $102,987,508 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)
2026-05-07 2026-03-31 13F LYONDELLBASELL INDUSTRIES SHS - A - N53745100 1,530,275 -306,978 -16.71 123,325 55.01 0.0055
2026-02-12 2025-12-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 1,837,253 -1,260,493 -40.69 79,558 -47.63 0.0167
2025-11-12 2025-09-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 3,097,746 -519,131 -14.35 151,914 -27.42 0.0326
2025-08-12 2025-06-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 3,616,877 -645,992 -15.15 209,309 -30.25 0.0485
2025-05-13 2025-03-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,262,869 -306,218 -6.70 300,069 -11.56 0.0746
2025-02-13 2024-12-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,569,087 -175,292 -3.69 339,308 -25.43 0.0815
2024-11-07 2024-09-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,744,379 49,018 1.04 455,005 1.30 0.1104
2024-08-09 2024-06-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,695,361 170,464 3.77 449,175 -2.95 0.1173
2024-05-10 2024-03-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,524,897 20,454 0.45 462,807 8.05 0.1253
2024-02-07 2023-12-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,504,443 -253,930 -5.34 428,307 -4.95 0.1251
2023-11-09 2023-09-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,758,373 -116,285 -2.39 450,634 0.67 0.1478
2023-08-09 2023-06-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,874,658 15,554 0.32 447,616 -1.88 0.1427
2023-05-12 2023-03-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,859,104 196,741 4.22 456,192 117,779.07 0.1537
2023-02-09 2022-12-31 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,662,363 270,339 6.16 387 -99.88 0.1144
2022-11-10 2022-09-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,392,024 360,362 8.94 330,629 -6.22 0.1269
2022-08-12 2022-06-30 13F LYONDELLBASELL INDUSTRIES N SHS - A - N53745100 4,031,662 118,680 3.03 352,572 -12.39 0.1265
2022-05-13 2022-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,912,982 214,468 5.80 402,422 17.98 0.1240
2022-02-09 2021-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,698,514 180,255 5.12 341,099 3.28 0.1031
2021-11-12 2021-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,518,259 121,460 3.58 330,280 -5.47 0.1064
2021-08-12 2021-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,396,799 237,805 7.53 349,396 6.29 0.1106
2021-05-14 2021-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,158,994 -26,325 -0.83 328,733 12.60 0.1087
2021-03-08 2020-12-31 13F/A-2 LYONDELLBASELL INDUSTRIES N CLA N53745100 3,185,319 26,430 0.84 291,952 31.13 0.1054
2021-02-11 2020-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,185,319 26,430 291,952 105,437.5443
2020-11-12 2020-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,158,889 148,481 4.93 222,637 12.55 0.0944
2020-08-13 2020-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 3,010,408 281,393 10.31 197,804 46.07 0.0869
2020-05-14 2020-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 2,729,015 361,539 15.27 135,418 -39.46 0.0705
2020-02-14 2019-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 2,367,476 -59,612 -2.46 223,667 3.01 0.0815
2019-11-12 2019-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 2,427,088 303,932 14.32 217,132 18.72 0.0844
2019-08-13 2019-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 2,123,156 158,643 8.08 182,897 10.73 0.0710
2019-08-12 2019-03-31 13F/A-2 LYONDELLBASELL INDUSTRIES N CLA N53745100 1,964,513 468,335 31.30 165,181 32.76 0.0658
2019-05-10 2019-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,964,513 468,335 165,181
2019-02-26 2018-12-31 13F/A-1 LYONDELLBASELL INDUSTRIES N CLA N53745100 1,496,178 229,894 18.16 124,420 -4.15 0.0564
2019-02-13 2018-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,496,178 229,894 124,420
2018-11-13 2018-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,266,284 105,552 9.09 129,808 1.81 0.0494
2018-08-10 2018-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,160,732 65,307 5.96 127,504 10.14 0.0508
2018-05-11 2018-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,095,425 15,547 1.44 115,765 -2.83 0.0482
2018-02-12 2017-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,079,878 -13,371 -1.22 119,142 10.02 0.0494
2017-11-13 2017-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,093,249 -273 -0.02 108,292 17.35 0.0473
2017-08-11 2017-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,093,522 20,902 1.95 92,280 -5.65 0.0426
2017-05-12 2017-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,072,620 9,626 0.91 97,811 7.26 0.0467
2017-02-09 2016-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,062,994 31,227 3.03 91,187 9.57 0.0455
2016-11-10 2016-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,031,767 9,392 0.92 83,222 9.38 0.0450
2016-08-09 2016-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,022,375 3,715 0.36 76,084 -12.73 0.0438
2016-05-13 2016-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 1,018,660 27,858 2.81 87,179 1.24 0.0522
2016-02-10 2015-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 990,802 14,734 1.51 86,107 5.84 0.0537
2015-11-13 2015-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 976,068 13,063 1.36 81,358 -18.38 0.0534
2015-08-14 2015-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 963,005 37,415 4.04 99,684 22.67 0.0610
2015-05-14 2015-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 925,590 -7,518 -0.81 81,261 9.68 0.0513
2015-02-06 2014-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 933,108 40,992 4.59 74,089 -23.59 0.0487
2014-11-13 2014-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 892,116 28,690 3.32 96,966 15.01 0.0687
2014-08-08 2014-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 863,426 245,617 39.76 84,308 53.45 0.0586
2014-05-14 2014-03-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 617,809 42,135 7.32 54,941 18.89 0.0411
2014-02-12 2013-12-31 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 575,674 15,538 2.77 46,211 12.67 0.0360
2013-11-13 2013-09-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 560,136 21,753 4.04 41,016 14.96 0.0355
2013-08-15 2013-06-30 13F LYONDELLBASELL INDUSTRIES N CLA N53745100 538,383 538,383 35,680 0.0336
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.