Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
264 institutional managers reported holding ARCB for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 62%. 39 opened new positions; 34 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 3.39M | 15.19% | $333.9M | trimmed -0.6% | 2014 Q2 |
| Vanguard Group | 2.46M | 11.01% | $242.0M | unchanged | 2014 Q2 |
| Dimensional Fund Advisors | 1.40M | 6.25% | $137.5M | added +3.5% | 2014 Q2 |
| American Century Companies INC | 1.38M | 6.19% | $136.0M | added +5.7% | 2018 Q2 |
| FMR (Fidelity) | 1.29M | 5.78% | $127.0M | added +109.8% | 2018 Q3 |
| AllianceBernstein | 1.03M | 4.62% | $101.5M | trimmed -29.5% | 2014 Q2 |
| State Street | 957.7k | 4.29% | $94.2M | added +1% | 2014 Q2 |
| Invesco | 809.2k | 3.62% | $79.6M | trimmed -12.1% | 2014 Q2 |
| Geode Capital | 569.8k | 2.55% | $56.1M | added +1.4% | 2014 Q2 |
| Charles Schwab Investment Management | 526.1k | 2.35% | $51.8M | added +1.1% | 2014 Q2 |
| Principal Financial Group INC | 488.1k | 2.19% | $48.0M | trimmed -1.1% | 2014 Q2 |
| Morgan Stanley | 483.8k | 2.17% | $47.6M | trimmed -1.7% | 2014 Q2 |
| Ameriprise Financial INC | 471.6k | 2.11% | $46.4M | trimmed -3.7% | 2014 Q2 |
| Jacobs Levy Equity Management, INC | 446.9k | 2.00% | $44.0M | trimmed -8.9% | 2014 Q2 |
| Maple Rock Capital Partners INC. (focused) | 404.3k | 1.81% | $39.8M | added +181.3% | 2025 Q4 |
| Victory Capital Management INC | 377.1k | 1.69% | $37.1M | trimmed -3.5% | 2016 Q4 |
| Westwood Holdings Group INC | 365.9k | 1.64% | $36.0M | trimmed -45.6% | 2023 Q2 |
| Northern Trust | 315.8k | 1.41% | $31.1M | added +1.2% | 2014 Q2 |
| UBS | 288.8k | 1.29% | $28.4M | added +7.4% | 2014 Q2 |
| Goldman Sachs | 267.9k | 1.20% | $26.4M | added +8.9% | 2014 Q2 |
| Nuveen | 239.4k | 1.07% | $23.6M | trimmed -33.4% | 2019 Q2 |
| Allianz Asset Management GmbH | 233.2k | 1.04% | $23.0M | added +45% | 2025 Q2 |
| Nomura Asset Management International INC. | 230.7k | 1.03% | $22.7M | trimmed -18.6% | 2025 Q4 |
| Driehaus Capital Management LLC | 210.3k | 0.94% | $20.7M | opened | 2026 Q1 |
| BNY Mellon | 192.1k | 0.86% | $18.9M | trimmed -1.4% | 2014 Q2 |
| Empowered Funds, LLC | 158.7k | 0.71% | $15.6M | added +37.7% | 2023 Q2 |
| MFS Investment Management | 151.2k | 0.68% | $14.9M | opened | 2026 Q1 |
| Segall Bryant & Hamill, LLC | 140.0k | 0.63% | $13.8M | trimmed -4.5% | 2023 Q2 |
| Aberdeen Group plc | 133.8k | 0.60% | $13.2M | added +37.1% | 2025 Q4 |
| Rockefeller Capital Management L.p. | 126.9k | 0.57% | $12.5M | trimmed -26% | 2023 Q3 |
| LSV Asset Management | 126.3k | 0.56% | $12.4M | trimmed -71.2% | 2015 Q1 |
| Manufacturers Life Insurance Company, THE | 124.8k | 0.56% | $12.3M | added +2.2% | 2014 Q3 |
| Heartland Advisors INC | 110.0k | 0.49% | $10.8M | added +83.3% | 2025 Q4 |
| Wasatch Advisors LP | 102.6k | 0.46% | $10.1M | trimmed -10.9% | 2025 Q3 |
| Partners Group Holding AG (focused) | 98.8k | 0.44% | $9.7M | trimmed -33% | 2024 Q2 |
| Two Sigma | 96.9k | 0.43% | $9.5M | trimmed -46.3% | 2023 Q1 |
| Russell Investments Group, LTD. | 92.5k | 0.41% | $9.1M | added +6.9% | 2016 Q4 |
| Bank OF America CORP /DE/ | 91.8k | 0.41% | $9.0M | trimmed -15% | 2014 Q2 |
| Bridgeway Capital Management, LLC | 84.4k | 0.38% | $8.3M | trimmed -4.9% | 2014 Q2 |
| Woodline Partners LP | 82.5k | 0.37% | $8.1M | opened | 2025 Q3 |
| Towle & CO | 80.1k | 0.36% | $7.9M | trimmed -37.4% | 2025 Q2 |
| Public Sector Pension Investment Board | 79.9k | 0.36% | $7.9M | added +2.6% | 2014 Q2 |
| Pier Capital, LLC | 79.7k | 0.36% | $7.8M | opened | 2026 Q1 |
| Allspring Global Investments Holdings, LLC | 66.2k | 0.30% | $6.5M | trimmed -24.1% | 2021 Q4 |
| Rhumbline Advisers | 65.3k | 0.29% | $6.4M | added +1.3% | 2014 Q2 |
| Bessemer Group INC | 64.9k | 0.29% | $6.4M | added +44.7% | 2021 Q1 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 60.2k | 0.27% | $5.9M | added +57% | 2024 Q4 |
| First Trust Advisors LP | 57.8k | 0.26% | $5.7M | added +1.6% | 2021 Q2 |
| Jain Global LLC | 54.5k | 0.24% | $5.4M | opened | 2026 Q1 |
| SEI Investments CO | 53.7k | 0.24% | $5.3M | added +102.7% | 2014 Q3 |
Largest 50 of 264 shown; the full ranked, searchable register is at boothcheck.com/holders/ARCB. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.