NewMarket Corporation
US ˙ NYSE ˙ US6515871076

SecurityNEU / NewMarket Corporation
InstitutionJohnson Financial Group, Inc.
Latest Disclosed Ownership81 shares
Latest Disclosed Value $ 52,161
Johnson Financial Group, Inc. reports 35.20% decrease in ownership of NEU / NewMarket Corporation

On May 7, 2026 - Johnson Financial Group, Inc. filed a 13F-HR form disclosing ownership of 81 shares of NewMarket Corporation (US:NEU) valued at $51,917 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 125 shares of NewMarket Corporation. This represents a change in shares of -35.20% during the quarter. The current value of the position is $64,001 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 81 -44 -35.20 52 -39.53 0.0014
2026-02-12 2025-12-31 13F NEWMARKET COM 651587107 125 125 86 0.0032
2020-02-14 2019-12-31 13F NEWMARKET COM 651587107 0 -44 -100.00 0 -100.00
2019-11-12 2019-09-30 13F NEWMARKET COM 651587107 44 0 0.00 21 16.67 0.0019
2019-08-09 2019-06-30 13F NEWMARKET COM 651587107 44 0 0.00 18 -5.26 0.0016
2019-05-13 2019-03-31 13F NEWMARKET COM 651587107 44 0 0.00 19 5.56 0.0017
2019-02-11 2018-12-31 13F NEWMARKET COM 651587107 44 0 0.00 18 0.00 0.0019
2018-11-09 2018-09-30 13F NEWMARKET COM 651587107 44 0 0.00 18 0.00 0.0018
2018-08-07 2018-06-30 13F NEWMARKET COM 651587107 44 0 0.00 18 0.00 0.0020
2018-05-07 2018-03-31 13F NEWMARKET COM 651587107 44 -37 -45.68 18 -43.75 0.0022
2018-02-12 2017-12-31 13F NEWMARKET COM 651587107 81 37 84.09 32 68.42 0.0039
2017-11-09 2017-09-30 13F NEWMARKET COM 651587107 44 0 0.00 19 -5.00 0.0025
2017-08-10 2017-06-30 13F NEWMARKET COM 651587107 44 -4,272 -98.98 20 -98.98 0.0029
2017-05-12 2017-03-31 13F NEWMARKET COM 651587107 4,316 56 1.31 1,956 8.31 0.2462
2017-02-07 2016-12-31 13F/A-1 NEWMARKET COM 651587107 4,260 -26 -0.61 1,806 -1.85 0.2490
2017-02-02 2016-12-31 13F NEWMARKET COM 651587107 4,260 1,806
2016-11-14 2016-09-30 13F NEWMARKET COM 651587107 4,286 37 0.87 1,840 4.49 0.2457
2016-08-12 2016-06-30 13F NEWMARKET COM 651587107 4,249 263 6.60 1,761 11.53 0.2439
2016-05-09 2016-03-31 13F NEWMARKET COM 651587107 3,986 83 2.13 1,579 6.26 0.3157
2016-02-08 2015-12-31 13F NEWMARKET COM 651587107 3,903 7 0.18 1,486 6.83 0.3088
2015-11-02 2015-09-30 13F NEWMARKET COM 651587107 3,896 36 0.93 1,391 -18.80 0.3044
2015-08-11 2015-06-30 13F NEWMARKET COM 651587107 3,860 34 0.89 1,713 -6.29 0.3551
2015-05-12 2015-03-31 13F NEWMARKET COM 651587107 3,826 -133 -3.36 1,828 14.39 0.3923
2015-02-10 2014-12-31 13F NEWMARKET COM 651587107 3,959 -1,026 -20.58 1,598 -15.85 0.3707
2014-11-14 2014-09-30 13F NEWMARKET COM 651587107 4,985 -3 -0.06 1,899 -2.91 0.4952
2014-08-06 2014-06-30 13F NEWMARKET COM 651587107 4,988 -264 -5.03 1,956 -4.68 0.5157
2014-05-14 2014-03-31 13F NEWMARKET COM 651587107 5,252 -566 -9.73 2,052 5.56 0.5997
2014-02-11 2013-12-31 13F NEWMARKET COM 651587107 5,818 252 4.53 1,944 21.35 0.5625
2013-11-14 2013-09-30 13F NEWMARKET COM 651587107 5,566 -999 -15.22 1,602 -7.08 0.4860
2013-08-14 2013-06-30 13F NEWMARKET COM 651587107 6,565 6,565 1,724 0.4799
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.