Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
432 institutional managers reported holding MSA for the quarter ended Mar 31, 2026. Together they hold about 86% of shares outstanding; the top 10 hold 40%. 62 opened new positions; 32 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 3.84M | 9.84% | $627.3M | added +1% | ≤2013 |
| BlackRock | 3.25M | 8.34% | $531.8M | added +2.3% | ≤2013 |
| Ruane Cunniff (Sequoia) (focused) | 1.78M | 4.56% | $290.5M | trimmed -2% | 2025 Q2 |
| State Street | 1.54M | 3.95% | $251.7M | trimmed -3.9% | ≤2013 |
| APG Asset Management N.v. | 1.50M | 3.84% | $244.9M | unchanged | 2019 Q4 |
| Cooke & Bieler LP | 845.5k | 2.17% | $138.3M | trimmed -6% | 2024 Q2 |
| Dimensional Fund Advisors | 758.3k | 1.95% | $124.0M | trimmed -0.8% | ≤2013 |
| M&G PLC | 698.0k | 1.79% | $114.2M | trimmed -4.2% | 2021 Q2 |
| BNY Mellon | 697.2k | 1.79% | $114.0M | trimmed -1.3% | ≤2013 |
| Geode Capital | 692.0k | 1.77% | $113.2M | added +5.4% | ≤2013 |
| T. Rowe Price Investment Management, INC. | 685.7k | 1.76% | $112.2M | added +204.5% | 2022 Q3 |
| Fiduciary Management INC /WI/ | 679.0k | 1.74% | $111.0M | trimmed -5.1% | 2025 Q2 |
| Conestoga Capital Advisors, LLC | 664.8k | 1.71% | $108.7M | trimmed -11.5% | 2023 Q4 |
| Champlain Investment Partners, LLC | 641.9k | 1.65% | $105.0M | trimmed -39.5% | 2017 Q3 |
| First Trust Advisors LP | 625.8k | 1.60% | $102.3M | unchanged | 2023 Q1 |
| Channing Capital Management, LLC | 607.4k | 1.56% | $99.3M | trimmed -3% | 2014 Q1 |
| Madison Asset Management, LLC | 588.6k | 1.51% | $96.3M | added +3.6% | 2025 Q4 |
| Franklin Resources | 533.5k | 1.37% | $87.3M | added +17.9% | 2025 Q3 |
| Morgan Stanley | 455.2k | 1.17% | $74.4M | added +12.7% | ≤2013 |
| Raymond James Financial INC | 445.0k | 1.14% | $72.8M | added +74.8% | 2015 Q2 |
| Victory Capital Management INC | 442.8k | 1.14% | $72.4M | added +1.4% | 2019 Q3 |
| Charles Schwab Investment Management | 427.1k | 1.09% | $69.8M | added +3.4% | ≤2013 |
| Invesco | 417.1k | 1.07% | $68.2M | trimmed -4.5% | ≤2013 |
| Natixis Advisors, LLC | 401.8k | 1.03% | $65.7M | added +10.6% | 2020 Q4 |
| Jones Financial Companies Lllp | 388.5k | 1.00% | $63.5M | added +177306.4% | 2024 Q2 |
| Goldman Sachs | 388.0k | 0.99% | $63.5M | added +13% | ≤2013 |
| Northern Trust | 342.6k | 0.88% | $56.0M | added +3% | ≤2013 |
| Principal Financial Group INC | 339.1k | 0.87% | $55.5M | trimmed -6.9% | ≤2013 |
| Brown Advisory INC | 322.4k | 0.83% | $52.7M | trimmed -15.2% | 2019 Q2 |
| Schroder Investment Management Group | 320.5k | 0.82% | $52.4M | added +2.7% | 2022 Q3 |
| BNP Paribas Financial Markets | 318.4k | 0.82% | $52.1M | trimmed -5.2% | ≤2013 |
| Capital Group (American Funds) | 229.7k | 0.59% | $37.6M | added +103.6% | 2025 Q2 |
| Royal Bank OF Canada | 218.1k | 0.56% | $35.7M | added +42.5% | ≤2013 |
| SEI Investments CO | 205.1k | 0.53% | $33.5M | added +6.1% | 2022 Q2 |
| UBS | 194.2k | 0.50% | $31.8M | trimmed -27.7% | ≤2013 |
| Ameriprise Financial INC | 188.6k | 0.48% | $30.8M | trimmed -6.7% | ≤2013 |
| NEW York State Common Retirement Fund | 181.5k | 0.47% | $29.7M | unchanged | ≤2013 |
| Copeland Capital Management, LLC | 176.7k | 0.45% | $28.9M | trimmed -0.7% | 2024 Q4 |
| Southernsun Asset Management, LLC (focused) | 170.5k | 0.44% | $27.9M | trimmed -8.2% | 2025 Q2 |
| Westwood Holdings Group INC | 167.6k | 0.43% | $27.4M | trimmed -4.4% | 2025 Q2 |
| Bessemer Group INC | 161.0k | 0.41% | $26.3M | added +56.6% | 2022 Q4 |
| Aberdeen Group plc | 154.6k | 0.40% | $25.3M | trimmed -1% | 2023 Q2 |
| Arbejdsmarkedets Tillaegspension | 144.8k | 0.37% | $23.7M | trimmed -1.8% | 2025 Q4 |
| Bank OF America CORP /DE/ | 144.4k | 0.37% | $23.6M | added +14.6% | ≤2013 |
| ProShare Advisors LLC | 140.4k | 0.36% | $23.0M | trimmed -29.7% | ≤2013 |
| Triodos Investment Management BV (focused) | 122.0k | 0.31% | $20.0M | unchanged | 2024 Q3 |
| Handelsbanken Fonder AB | 117.7k | 0.30% | $19.3M | trimmed -39.2% | 2018 Q2 |
| Royce & Associates | 116.4k | 0.30% | $19.0M | added +21.5% | 2025 Q2 |
| Wells Fargo & COMPANY/MN | 113.0k | 0.29% | $18.5M | added +3.3% | ≤2013 |
| Lazard Asset Management LLC | 112.2k | 0.29% | $18.4M | trimmed -3.6% | 2019 Q4 |
Largest 50 of 432 shown; the full ranked, searchable register is at boothcheck.com/holders/MSA. 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.