Albemarle Corporation
US ˙ NYSE ˙ US0126531013

SecurityALB / Albemarle Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership648,300 shares
Latest Disclosed Value $ 91,695,630
Sei Investments Co reports 16.07% increase in ownership of ALB / Albemarle Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 648,300 shares of Albemarle Corporation (US:ALB) valued at $91,695,552 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 558,555 shares of Albemarle Corporation. This represents a change in shares of 16.07% during the quarter. The current value of the position is $109,134,822 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 ALBEMARLE COM 012653101 648,300 89,745 16.07 91,696 102.47 0.0905
2025-11-13 2025-09-30 13F ALBEMARLE COM 012653101 558,555 23,153 4.32 45,288 34.97 0.0487
2025-08-14 2025-06-30 13F ALBEMARLE COM 012653101 535,402 11,691 2.23 33,554 -11.04 0.0389
2025-05-14 2025-03-31 13F/A-1 ALBEMARLE COM 012653101 523,711 -7,979 -1.50 37,717 -17.59 0.0485
2025-05-13 2025-03-31 13F ALBEMARLE COM 012653101 534,163 2,473 45,708 0.0497
2025-02-11 2024-12-31 13F ALBEMARLE COM 012653101 531,690 17,687 3.44 45,767 -5.98 0.0588
2024-11-12 2024-09-30 13F ALBEMARLE COM 012653101 514,003 -11,040 -2.10 48,680 -2.94 0.0632
2024-08-13 2024-06-30 13F ALBEMARLE COM 012653101 525,043 90,813 20.91 50,153 -12.33 0.0711
2024-05-07 2024-03-31 13F ALBEMARLE COM 012653101 434,230 19,579 4.72 57,206 -4.51 0.0838
2024-02-14 2023-12-31 13F ALBEMARLE COM 012653101 414,651 90,081 27.75 59,908 8.55 0.0962
2023-11-14 2023-09-30 13F ALBEMARLE COM 012653101 324,570 23,287 7.73 55,190 -17.89 0.0992
2023-08-11 2023-06-30 13F ALBEMARLE COM 012653101 301,283 11,050 3.81 67,213 4.77 0.1172
2023-05-12 2023-03-31 13F ALBEMARLE COM 012653101 290,233 24,004 9.02 64,153 11.12 0.1192
2023-02-10 2022-12-31 13F ALBEMARLE COM 012653101 266,229 7,041 2.72 57,734 -15.77 0.1283
2022-11-14 2022-09-30 13F ALBEMARLE COM 012653101 259,188 2,539 0.99 68,539 27.89 0.1529
2022-08-15 2022-06-30 13F ALBEMARLE COM 012653101 256,649 52,364 25.63 53,594 18.67 0.1157
2022-05-13 2022-03-31 13F ALBEMARLE COM 012653101 204,285 30,663 17.66 45,163 11.34 0.0908
2022-02-14 2021-12-31 13F ALBEMARLE COM 012653101 173,622 5,798 3.45 40,562 10.39 0.0761
2021-11-12 2021-09-30 13F ALBEMARLE COM 012653101 167,824 127,282 313.95 36,744 437.35 0.0771
2021-08-06 2021-06-30 13F ALBEMARLE COM 012653101 40,542 -7,720 -16.00 6,838 -2.97 0.0152
2021-05-12 2021-03-31 13F ALBEMARLE COM 012653101 48,262 -3,839 -7.37 7,047 -8.17 0.0178
2021-02-08 2020-12-31 13F ALBEMARLE COM 012653101 52,101 4,571 9.62 7,674 82.63 0.0198
2020-12-04 2020-09-30 13F/A-1 ALBEMARLE COM 012653101 47,530 -23,882 -33.44 4,202 -23.00 0.0122
2020-11-06 2020-09-30 13F ALBEMARLE COM 012653101 50,473 -20,939 4,465 10,750.7273
2020-08-17 2020-06-30 13F/A-1 ALBEMARLE COM 012653101 71,412 -2,469 -3.34 5,457 30.68 0.0169
2020-08-11 2020-06-30 13F ALBEMARLE COM 012653101 82,469 8,588 6,003 16,283.4570
2020-05-14 2020-03-31 13F ALBEMARLE COM 012653101 73,881 -270 -0.36 4,176 -22.90 0.0153
2020-02-06 2019-12-31 13F ALBEMARLE COM 012653101 74,151 -6,041 -7.53 5,416 -2.85 0.0162
2019-11-12 2019-09-30 13F ALBEMARLE COM 012653101 80,192 -38,597 -32.49 5,575 -33.35 0.0143
2019-08-14 2019-06-30 13F ALBEMARLE COM 012653101 118,789 -16,699 -12.33 8,364 -24.70 0.0273
2019-05-15 2019-03-31 13F ALBEMARLE COM 012653101 135,488 -65,226 -32.50 11,107 -44.50 0.0373
2019-02-13 2018-12-31 13F ALBEMARLE COM 012653101 200,714 50 0.02 20,012 -0.12 0.0712
2018-11-08 2018-09-30 13F ALBEMARLE COM 012653101 200,664 7,153 3.70 20,037 9.77 0.0726
2018-08-03 2018-06-30 13F ALBEMARLE COM 012653101 193,511 192,001 12,715.30 18,254 12,938.57 0.0620
2018-05-11 2018-03-31 13F ALBEMARLE COM 012653101 1,510 -223,087 -99.33 140 -99.50 0.0005
2018-02-08 2017-12-31 13F ALBEMARLE COM 012653101 224,597 48,096 27.25 28,160 17.09 0.0978
2017-11-06 2017-09-30 13F ALBEMARLE COM 012653101 176,501 -2,900 -1.62 24,050 27.02 0.0855
2017-07-31 2017-06-30 13F ALBEMARLE COM 012653101 179,401 4,072 2.32 18,934 2.22 0.0755
2017-05-05 2017-03-31 13F ALBEMARLE COM 012653101 175,329 21,897 14.27 18,522 42.09 0.0812
2017-02-02 2016-12-31 13F ALBEMARLE COM 012653101 153,432 8,508 5.87 13,035 5.21 0.0631
2016-11-04 2016-09-30 13F ALBEMARLE COM 012653101 144,924 57,476 65.73 12,390 78.63 0.0629
2016-08-11 2016-06-30 13F ALBEMARLE COM 012653101 87,448 22,563 34.77 6,936 67.21 0.0416
2016-05-10 2016-03-31 13F/A-1 ALBEMARLE COM 012653101 64,885 12,385 23.59 4,148 41.09 0.0258
2016-02-03 2015-12-31 13F ALBEMARLE COM 012653101 52,500 598 1.15 2,940 28.44 0.0179
2015-11-02 2015-09-30 13F/A-1 ALBEMARLE COM 012653101 51,902 -18,078 -25.83 2,289 -40.82 0.0210
2015-10-30 2015-09-30 13F ALBEMARLE COM 012653101 51,902 2,290
2015-08-07 2015-06-30 13F/A-1 ALBEMARLE COM 012653101 69,980 9,226 15.19 3,868 20.42 0.0350
2015-08-04 2015-06-30 13F ALBEMARLE COM 012653101 69,980 9,226 3,868 0.0350
2015-05-14 2015-03-31 13F/A-1 ALBEMARLE COM 012653101 60,754 57,054 1,542.00 3,212 1,333.93 0.0279
2015-05-01 2015-03-31 13F ALBEMARLE COM 012653101 60,754 3,212
2015-02-10 2014-12-31 13F ALBEMARLE COM 012653101 3,700 3,700 224 0.0020
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.