Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in NEU held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 717K | $459.4M | +8.6% | 7.628% | 0.01% |
| 2 | LONDON CO OF VIRGINIA | 461K | $295.5M | -6.5% | 4.907% | 1.82% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 450K | $288.7M | β | 4.795% | 0.02% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 354K | $227.1M | β | 3.771% | 0.01% |
| 5 | Boston Partners | 251K | $160.9M | β | 2.673% | 0.17% |
| 6 | STATE STREET CORP | 234K | $150.4M | +1.2% | 2.487% | 0.01% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 195K | $124.7M | +6.7% | 2.070% | 0.03% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 185K | $118.4M | +5.2% | 1.966% | 0.01% |
| 9 | AMERICAN CENTURY COMPANIES INC | 169K | $108.1M | +32.4% | 1.795% | 0.06% |
| 10 | CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | 134K | $85.9M | +15.5% | 1.426% | 0.14% |
| 11 | AQR CAPITAL MANAGEMENT LLC | 118K | $75.1M | -6.8% | 1.260% | 0.03% |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 103K | $65.9M | +7.3% | 1.095% | 0.01% |
| 13 | UBS Group AG | 99K | $63.4M | +741.3% | 1.052% | 0.01% |
| 14 | MORGAN STANLEY | 93K | $59.9M | +16.6% | 0.995% | 0.00% |
| 15 | MILLENNIUM MANAGEMENT LLC | 86K | $55.1M | +156.7% | 0.916% | 0.04% |
| 16 | NORTHERN TRUST CORP | 82K | $52.7M | +2.2% | 0.875% | 0.01% |
| 17 | Bank of New York Mellon Corp | 76K | $48.9M | -12.2% | 0.812% | 0.01% |
| 18 | Invesco Ltd. | 75K | $47.9M | -1.0% | 0.795% | 0.01% |
| 19 | CITADEL ADVISORS LLC | 55K | $35.5M | β | 0.590% | 0.02% |
| 20 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 55K | $35.0M | +1807.5% | 0.581% | 0.02% |
| 21 | GOLDMAN SACHS GROUP INC | 53K | $33.8M | +12.3% | 0.561% | 0.00% |
| 22 | LOS ANGELES CAPITAL MANAGEMENT LLC | 52K | $33.3M | +157548.5% | 0.554% | 0.13% |
| 23 | BANK OF AMERICA CORP /DE/ | 50K | $32.0M | -94.8% | 0.531% | 0.00% |
| 24 | VANGUARD FIDUCIARY TRUST CO | 49K | $31.1M | β | 0.516% | 0.01% |
| 25 | Allianz Asset Management GmbH | 45K | $29.0M | +14.1% | 0.481% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in NEU β a direct measure of their conviction.
Filings activity in NEU during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 374 | 8.8% | 43.16% | 7.34 pp | $3.38B | 15% |
| Q4 2025 | 410 | +5.1% | 50.50% | 9.52 pp | $3.95B | 16% |
| Q3 2025 | 390 | +10% | 60.02% | +10.49 pp | $4.70B | +21% |
| Q2 2025 | 354 | +13% | 49.53% | +9.15 pp | $3.88B | +23% |
| Q1 2025 | 314 | +0.3% | 40.38% | +1.87 pp | $3.16B | +4.8% |
| Q4 2024 | 313 | +0.0% | 38.51% | 0.72 pp | $3.02B | 1.8% |
| Q3 2024 | 313 | 0.9% | 39.23% | +2.02 pp | $3.07B | +5.4% |
| Q2 2024 | 316 | β | 37.21% | β | $2.91B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying NEU stock.
Based on Q1 2026 13F filings, institutional ownership of NewMarket Corporation stands at 43.2%, held across 374 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of NEU, with approximately 716,683 shares worth $0.46B as of Q1 2026.
Yes β 2 widely-followed marquee investors appear among the top 25 institutional holders of NEU, including MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC.
Our composite Smart Money Score for NEU is 34 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
60 institutions opened new positions in NEU during Q1 2026, while 96 fully exited. 94 added to existing positions and 218 trimmed.
NEU institutional ownership fell by 7.34 percentage points quarter-over-quarter, with a net change of -36 holders.
The top 10 institutions account for 59.8% of all reported 13F value in NEU, and the top 25 account for 80.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
NewMarket Corporation (NEU) Institutional Ownership