NewMarket Corporation
US ˙ NYSE ˙ US6515871076

SecurityNEU / NewMarket Corporation
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership1,038 shares
Latest Disclosed Value $ 713,378
Parallel Advisors, LLC ownership in NEU / NewMarket Corporation

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 1,038 shares of NewMarket Corporation (US:NEU) valued at $713,376 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 745 shares of NewMarket Corporation. This represents a change in shares of 39.33% during the quarter. The current value of the position is $811,176 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (NEU) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

NEU / NewMarket Corporation Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F NEWMARKET CORP COM Stock 651587107 1,038 293 39.33 713 15.56 0.0130
2025-11-13 2025-09-30 13F NEWMARKET CORP COM Stock 651587107 745 5 0.68 617 20.74 0.0113
2025-07-08 2025-06-30 13F NEWMARKET CORP COM Stock 651587107 740 15 2.07 511 24.63 0.0102
2025-04-08 2025-03-31 13F NEWMARKET CORP COM Stock 651587107 725 -10 -1.36 411 5.67 0.0093
2025-02-10 2024-12-31 13F NEWMARKET CORP COM Stock 651587107 735 30 4.26 388 -0.26 0.0087
2024-11-13 2024-09-30 13F NEWMARKET CORP COM Stock 651587107 705 61 9.47 389 17.17 0.0091
2024-08-08 2024-06-30 13F NEWMARKET CORP COM Stock 651587107 644 -97 -13.09 332 -29.36 0.0085
2024-05-06 2024-03-31 13F NEWMARKET CORP COM Stock 651587107 741 124 20.10 470 39.88 0.0127
2024-02-12 2023-12-31 13F NEWMARKET CORP COM Stock 651587107 617 53 9.40 337 31.25 0.0100
2024-05-20 2023-09-30 13F/A-1 NEWMARKET CORP COM Stock 651587107 564 7 1.26 257 14.80 0.0085
2023-11-14 2023-09-30 13F NEWMARKET CORP COM Stock 651587107 564 7 257 0.0085
2024-05-20 2023-06-30 13F/A-1 NEWMARKET CORP COM Stock 651587107 557 0 0.00 224 9.85 0.0072
2023-08-04 2023-06-30 13F NEWMARKET CORP COM Stock 651587107 557 0 224 0.0072
2024-05-20 2023-03-31 13F/A-1 NEWMARKET CORP COM Stock 651587107 557 -187 -25.13 203 -12.12 0.0069
2023-04-25 2023-03-31 13F NEWMARKET CORP COM Stock 651587107 557 -187 203 0.0069
2023-02-06 2022-12-31 13F NEWMARKET CORP COM Stock 651587107 744 577 345.51 231 362.00 0.0100
2022-11-10 2022-09-30 13F NEWMARKET CORP COM Stock 651587107 167 3 1.83 50 2.04 0.0023
2022-08-01 2022-06-30 13F NEWMARKET CORP COM Stock 651587107 164 -26 -13.68 49 -20.97 0.0022
2022-04-28 2022-03-31 13F NEWMARKET CORP COM Stock 651587107 190 -64 -25.20 62 -28.74 0.0025
2022-01-20 2021-12-31 13F NEWMARKET CORP COM Stock 651587107 254 -4 -1.55 87 0.00 0.0032
2021-11-02 2021-09-30 13F/A-1 NEWMARKET CORP COM Stock 651587107 258 79 44.13 87 50.00 0.0035
2021-08-06 2021-06-30 13F NEWMARKET CORP COM Stock 651587107 179 -21 -10.50 58 -23.68 0.0025
2021-04-23 2021-03-31 13F NEWMARKET CORP COM Stock 651587107 200 -35 -14.89 76 -19.15 0.0036
2021-02-02 2020-12-31 13F NEWMARKET CORP COM Stock 651587107 235 21 9.81 94 28.77 0.0051
2020-10-27 2020-09-30 13F NEWMARKET CORP COM Stock 651587107 214 -333 -60.88 73 -66.67 0.0045
2020-07-16 2020-06-30 13F NEWMARKET CORP COM Stock 651587107 547 78 16.63 219 22.35 0.0143
2020-04-27 2020-03-31 13F NEWMARKET CORP COM Stock 651587107 469 252 116.13 179 68.87 0.0145
2020-01-30 2019-12-31 13F NEWMARKET CORP COM Stock 651587107 217 25 13.02 106 16.48 0.0080
2019-11-01 2019-09-30 13F NEWMARKET CORP COM Stock 651587107 192 -4 -2.04 91 15.19 0.0078
2019-08-05 2019-06-30 13F NEWMARKET CORP COM Stock 651587107 196 5 2.62 79 -4.82 0.0077
2019-05-01 2019-03-31 13F NEWMARKET CORP COM Stock 651587107 191 24 14.37 83 22.06 0.0093
2019-02-05 2018-12-31 13F NEWMARKET CORP COM Stock 651587107 167 0 0.00 68 0.00 0.0095
2018-11-01 2018-09-30 13F NEWMARKET CORP COM Stock 651587107 167 0 0.00 68 1.49 0.0084
2018-07-30 2018-06-30 13F NEWMARKET CORP COM Stock 651587107 167 23 15.97 67 15.52 0.0096
2018-05-08 2018-03-31 13F NEWMARKET CORP COM Stock 651587107 144 0 0.00 58 1.75 0.0091
2018-02-13 2017-12-31 13F NEWMARKET CORP COM Stock 651587107 144 -41 -22.16 57 -21.92 0.0093
2017-11-15 2017-09-30 13F/A-1 NEWMARKET CORP COM Stock 651587107 185 28 17.83 73 1.39 0.0126
2017-08-07 2017-06-30 13F NEWMARKET CORP COM Stock 651587107 157 13 9.03 72 7.46 0.0136
2017-05-12 2017-03-31 13F/A-1 NEWMARKET CORP COM Stock 651587107 144 0 0.00 67 9.84 0.0133
2017-05-12 2017-03-31 13F NEWMARKET CORP COM Stock 651587107 144 67
2017-02-14 2016-12-31 13F NEWMARKET CORP COM Stock 651587107 144 144 61 0.0143
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F NEWMARKET CORP COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F NEWMARKET CORP COM Stock Call 179 58 n/a n/a n/a
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.