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NEU · Newmarket Corp

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Market Cap
$8.41B
Shares
9.20M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 423
Total Value: $4,790,465,978
Total Shares: 6,054,760
Showing 1–100 of 430 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 423 13F filers · Δ vs Mar 31, 2026
Top Holder
11.6%
Sep 2023 → Jun 2026 · range 11.6% – 17.8%
−0.6 pts
Top 5
37.7%
Sep 2023 → Jun 2026 · range 37.7% – 54.5%
−0.8 pts
Top 10
56.8%
Sep 2023 → Jun 2026 · range 56.1% – 69.1%
+0.7 pts
HHI
426
Sep 2023 → Jun 2026 · range 426 – 750
Broadly held−6

Quarterly Activity

vs Mar 31, 2026
New
89
Increased
132
Decreased
137
Sold Out
52
Unchanged
65
Holder count: +37
Institutional value: +27.7%
Shares held: +3.5%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 430
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1282637 CUSIP 651587107 13F (30d) 331 filings 310 filers Visit website