Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ARQ held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | ROYCE & ASSOCIATES LP | 1.9M | $4.8M | +6.5% | 4.340% | 0.04% |
| 2 | AQR CAPITAL MANAGEMENT LLC | 1.8M | $4.6M | +67.1% | 4.226% | 0.00% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $3.7M | +2.3% | 3.412% | 0.00% |
| 4 | MARSHALL WACE, LLP | 880K | $2.2M | +8.7% | 2.050% | 0.00% |
| 5 | Peapod Lane Capital LLC | 788K | $2.0M | +1.6% | 1.835% | 1.36% |
| 6 | DIMENSIONAL FUND ADVISORS LP | 607K | $1.5M | -20.3% | 1.415% | 0.00% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | 598K | $1.5M | +45.7% | 1.393% | 0.00% |
| 8 | JANE STREET GROUP, LLC | 509K | $1.3M | +152.9% | 1.186% | 0.00% |
| 9 | BlackRock, Inc. | 509K | $1.3M | -75.7% | 1.186% | 0.00% |
| 10 | DCF Advisers, LLC | 462K | $1.2M | +40.8% | 1.075% | 0.21% |
| 11 | Truffle Hound Capital, LLC | 420K | $1.1M | — | 0.978% | 0.23% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 400K | $1.0M | -50.1% | 0.931% | 0.00% |
| 13 | Round Rock Advisors LLC | 379K | $966K | +98.7% | 0.883% | 0.12% |
| 14 | RBF Capital, LLC | 370K | $944K | — | 0.862% | 0.04% |
| 15 | D. E. Shaw & Co., Inc. | 358K | $914K | +27.2% | 0.835% | 0.00% |
| 16 | JACOBS LEVY EQUITY MANAGEMENT, INC | 329K | $839K | -6.3% | 0.766% | 0.00% |
| 17 | Marex Group Ltd | 261K | $665K | +334.8% | 0.608% | 0.00% |
| 18 | TWO SIGMA INVESTMENTS, LP | 252K | $642K | +777.3% | 0.587% | 0.00% |
| 19 | CITADEL ADVISORS LLC | 236K | $601K | +2024.3% | 0.549% | 0.00% |
| 20 | BANK OF AMERICA CORP /DE/ | 231K | $590K | +13.6% | 0.539% | 0.00% |
| 21 | VANGUARD FIDUCIARY TRUST CO | 211K | $538K | +3.7% | 0.492% | 0.00% |
| 22 | Connor, Clark & Lunn Investment Management Ltd. | 182K | $464K | — | 0.423% | 0.00% |
| 23 | Rangeley Capital, LLC | 157K | $400K | — | 0.366% | 0.37% |
| 24 | STATE STREET CORP | 154K | $393K | -72.7% | 0.359% | 0.00% |
| 25 | UBS Group AG | 136K | $347K | +950.6% | 0.317% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ARQ — a direct measure of their conviction.
Filings activity in ARQ during Q2 2026, grouped by how each filer changed its position.
Institutions that opened a new ARQ position in Q2 2026
Institutions that fully closed their ARQ position in Q2 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 99 | +3.1% | 36.28% | +2.04 pp | $39M | +5.2% |
| Q1 2026 | 96 | 5.0% | 34.24% | 2.74 pp | $37M | 31% |
| Q4 2025 | 101 | +9.8% | 36.98% | 5.22 pp | $53M | 59% |
| Q3 2025 | 92 | +11% | 42.20% | +2.32 pp | $131M | +47% |
| Q2 2025 | 83 | 5.7% | 39.88% | +1.40 pp | $89M | +33% |
| Q1 2025 | 88 | 1.1% | 38.48% | 0.37 pp | $67M | 45% |
| Q4 2024 | 89 | +6.0% | 38.85% | +1.42 pp | $123M | +34% |
| Q3 2024 | 84 | — | 37.43% | — | $92M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ARQ stock.
Based on Q2 2026 13F filings, institutional ownership of Arq, Inc. stands at 36.3%, held across 99 reporting institutions.
ROYCE & ASSOCIATES LP is the largest reported institutional holder of ARQ, with approximately 1,862,764 shares worth $0.00B as of Q2 2026.
Yes — 4 widely-followed marquee investors appear among the top 25 institutional holders of ARQ, including RENAISSANCE TECHNOLOGIES LLC, JANE STREET GROUP, LLC, TWO SIGMA INVESTMENTS, LP, CITADEL ADVISORS LLC.
Our composite Smart Money Score for ARQ is 72 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
25 institutions opened new positions in ARQ during Q2 2026, while 22 fully exited. 35 added to existing positions and 35 trimmed.
ARQ institutional ownership rose by 2.04 percentage points quarter-over-quarter, with a net change of +3 holders.
The top 10 institutions account for 62.5% of all reported 13F value in ARQ, and the top 25 account for 89.3%.
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.
Arq, Inc. (ARQ) Institutional Ownership