NewMarket Corporation
US ˙ NYSE ˙ US6515871076

SecurityNEU / NewMarket Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership194,507 shares
Latest Disclosed Value $ 124,658,409
Dimensional Fund Advisors Lp reports 6.68% increase in ownership of NEU / NewMarket Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 194,507 shares of NewMarket Corporation (US:NEU) valued at $124,669,262 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 182,335 shares of NewMarket Corporation. This represents a change in shares of 6.68% during the quarter. The current value of the position is $152,003,330 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 NEWMARKET COM 651587107 194,507 12,172 6.68 124,658 -0.53 0.0056
2026-02-12 2025-12-31 13F NEWMARKET COM 651587107 182,335 2,633 1.47 125,321 -15.79 0.0263
2025-11-12 2025-09-30 13F NEWMARKET COM 651587107 179,702 2,049 1.15 148,820 21.26 0.0319
2025-08-12 2025-06-30 13F NEWMARKET COM 651587107 177,653 2,953 1.69 122,731 24.04 0.0284
2025-05-13 2025-03-31 13F NEWMARKET COM 651587107 174,700 4,482 2.63 98,945 10.01 0.0246
2025-02-13 2024-12-31 13F NEWMARKET COM 651587107 170,218 4,621 2.79 89,938 -1.59 0.0216
2024-11-07 2024-09-30 13F NEWMARKET COM 651587107 165,597 6,130 3.84 91,392 11.16 0.0222
2024-08-09 2024-06-30 13F NEWMARKET COM 651587107 159,467 12,110 8.22 82,214 -12.09 0.0215
2024-05-10 2024-03-31 13F NEWMARKET COM 651587107 147,357 768 0.52 93,516 16.87 0.0253
2024-02-07 2023-12-31 13F NEWMARKET COM 651587107 146,589 1,958 1.35 80,015 21.57 0.0234
2023-11-09 2023-09-30 13F NEWMARKET COM 651587107 144,631 7,221 5.26 65,818 19.11 0.0216
2023-08-09 2023-06-30 13F NEWMARKET COM 651587107 137,410 10,213 8.03 55,257 19.03 0.0176
2023-05-12 2023-03-31 13F NEWMARKET COM 651587107 127,197 6,833 5.68 46,423 125,364.86 0.0156
2023-02-09 2022-12-31 13F NEWMARKET COM 651587107 120,364 3,259 2.78 37 -99.89 0.0111
2022-11-10 2022-09-30 13F NEWMARKET COM 651587107 117,105 6,359 5.74 35,228 5.70 0.0135
2022-08-12 2022-06-30 13F NEWMARKET COM 651587107 110,746 4,091 3.84 33,329 -3.67 0.0120
2022-05-13 2022-03-31 13F NEWMARKET COM 651587107 106,655 -721 -0.67 34,597 -5.99 0.0107
2022-02-09 2021-12-31 13F NEWMARKET COM 651587107 107,376 3,159 3.03 36,802 4.23 0.0111
2021-11-12 2021-09-30 13F NEWMARKET COM 651587107 104,217 4,352 4.36 35,307 9.81 0.0114
2021-08-12 2021-06-30 13F NEWMARKET COM 651587107 99,865 1,273 1.29 32,154 -14.22 0.0102
2021-05-14 2021-03-31 13F NEWMARKET COM 651587107 98,592 -2,306 -2.29 37,483 -6.73 0.0124
2021-03-08 2020-12-31 13F/A-2 NEWMARKET COM 651587107 100,898 -235 -0.23 40,187 16.08 0.0145
2021-02-11 2020-12-31 13F NEWMARKET COM 651587107 100,898 -235 40,187 14,513.4083
2020-11-12 2020-09-30 13F NEWMARKET COM 651587107 101,133 1,777 1.79 34,619 -12.99 0.0147
2020-08-13 2020-06-30 13F NEWMARKET COM 651587107 99,356 5,752 6.15 39,788 11.00 0.0175
2020-05-14 2020-03-31 13F NEWMARKET COM 651587107 93,604 4,013 4.48 35,846 -17.76 0.0187
2020-02-14 2019-12-31 13F NEWMARKET COM 651587107 89,591 -1,119 -1.23 43,589 1.80 0.0159
2019-11-12 2019-09-30 13F NEWMARKET COM 651587107 90,710 -6,781 -6.96 42,819 9.55 0.0166
2019-08-13 2019-06-30 13F NEWMARKET COM 651587107 97,491 -617 -0.63 39,087 -8.11 0.0152
2019-08-12 2019-03-31 13F/A-2 NEWMARKET COM 651587107 98,108 2,262 2.36 42,537 7.70 0.0169
2019-05-10 2019-03-31 13F NEWMARKET COM 651587107 98,108 2,262 42,537
2019-02-26 2018-12-31 13F/A-1 NEWMARKET COM 651587107 95,846 4,644 5.09 39,495 6.79 0.0179
2019-02-13 2018-12-31 13F NEWMARKET COM 651587107 95,846 4,644 39,495
2018-11-13 2018-09-30 13F NEWMARKET COM 651587107 91,202 5,408 6.30 36,983 6.57 0.0141
2018-08-10 2018-06-30 13F NEWMARKET COM 651587107 85,794 12,338 16.80 34,702 17.61 0.0138
2018-05-11 2018-03-31 13F NEWMARKET COM 651587107 73,456 2,966 4.21 29,506 5.34 0.0123
2018-02-12 2017-12-31 13F NEWMARKET COM 651587107 70,490 1,319 1.91 28,011 -4.88 0.0116
2017-11-13 2017-09-30 13F NEWMARKET COM 651587107 69,171 316 0.46 29,449 -7.12 0.0129
2017-08-11 2017-06-30 13F NEWMARKET COM 651587107 68,855 3,211 4.89 31,705 6.57 0.0146
2017-05-12 2017-03-31 13F NEWMARKET COM 651587107 65,644 2,883 4.59 29,751 11.84 0.0142
2017-02-09 2016-12-31 13F NEWMARKET COM 651587107 62,761 2,267 3.75 26,602 2.44 0.0133
2016-11-10 2016-09-30 13F NEWMARKET COM 651587107 60,494 1,977 3.38 25,968 7.12 0.0140
2016-08-09 2016-06-30 13F NEWMARKET COM 651587107 58,517 427 0.74 24,243 5.32 0.0139
2016-05-13 2016-03-31 13F NEWMARKET COM 651587107 58,090 431 0.75 23,019 4.86 0.0138
2016-02-10 2015-12-31 13F NEWMARKET COM 651587107 57,659 2,162 3.90 21,953 10.81 0.0137
2015-11-13 2015-09-30 13F NEWMARKET COM 651587107 55,497 1,991 3.72 19,812 -16.59 0.0130
2015-08-14 2015-06-30 13F NEWMARKET COM 651587107 53,506 3,883 7.83 23,752 0.19 0.0145
2015-05-14 2015-03-31 13F NEWMARKET COM 651587107 49,623 -525 -1.05 23,708 17.15 0.0150
2015-02-06 2014-12-31 13F NEWMARKET COM 651587107 50,148 -1,203 -2.34 20,237 3.42 0.0133
2014-11-13 2014-09-30 13F NEWMARKET COM 651587107 51,351 880 1.74 19,568 -1.13 0.0139
2014-08-08 2014-06-30 13F NEWMARKET COM 651587107 50,471 4,901 10.75 19,792 11.15 0.0138
2014-05-14 2014-03-31 13F NEWMARKET COM 651587107 45,570 1,035 2.32 17,807 19.65 0.0133
2014-02-12 2013-12-31 13F NEWMARKET COM 651587107 44,535 -808 -1.78 14,882 14.00 0.0116
2013-11-13 2013-09-30 13F NEWMARKET COM 651587107 45,343 -1,789 -3.80 13,054 5.46 0.0113
2013-08-15 2013-06-30 13F NEWMARKET COM 651587107 47,132 47,132 12,378 0.0117
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.