Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
707 institutional managers reported holding MEDP for the quarter ended Mar 31, 2026. Together they hold about 83% of shares outstanding; the top 10 hold 36%. 80 opened new positions; 140 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 2.47M | 8.53% | $1.19B | added +2.4% | 2016 Q3 |
| Vanguard Group | 2.31M | 7.99% | $1.11B | added +2.1% | 2016 Q3 |
| AQR Capital | 1.35M | 4.67% | $650.3M | unchanged | 2018 Q1 |
| Wasatch Advisors LP | 773.9k | 2.67% | $371.7M | added +19.4% | 2018 Q4 |
| Geode Capital | 745.1k | 2.57% | $357.9M | added +11.7% | 2016 Q3 |
| State Street | 682.2k | 2.36% | $327.7M | added +2.6% | 2016 Q3 |
| Invesco | 577.6k | 1.99% | $277.4M | added +19.7% | 2016 Q3 |
| Renaissance Technologies | 504.7k | 1.74% | $242.4M | added +8.3% | 2017 Q3 |
| Baillie Gifford | 503.2k | 1.74% | $241.7M | trimmed -8% | 2024 Q2 |
| UBS | 481.2k | 1.66% | $231.2M | added +7.9% | 2016 Q3 |
| Mawer Investment Management LTD. | 446.1k | 1.54% | $214.3M | added +9.5% | 2025 Q1 |
| D. E. Shaw | 432.6k | 1.49% | $207.8M | trimmed -18.1% | 2017 Q2 |
| Arrowstreet Capital | 395.8k | 1.37% | $190.1M | added +5.5% | 2019 Q3 |
| Dimensional Fund Advisors | 348.5k | 1.20% | $167.4M | trimmed -3% | 2018 Q1 |
| T. Rowe Price | 289.5k | 1.00% | $139.1M | added +148.3% | 2018 Q3 |
| Morgan Stanley | 288.4k | 1.00% | $138.5M | trimmed -30.8% | 2016 Q3 |
| Bessemer Group INC | 285.4k | 0.99% | $137.1M | trimmed -10% | 2021 Q3 |
| Madison Asset Management, LLC | 262.3k | 0.91% | $126.0M | trimmed -5.6% | 2024 Q4 |
| Giverny Capital INC. | 256.1k | 0.88% | $123.0M | trimmed -2.7% | 2023 Q4 |
| Riverbridge Partners LLC | 237.4k | 0.82% | $114.0M | trimmed -13% | 2021 Q1 |
| Thrivent Financial for Lutherans | 231.5k | 0.80% | $111.2M | added +84.8% | 2017 Q4 |
| Northern Trust | 226.3k | 0.78% | $108.7M | added +3.4% | 2016 Q3 |
| American Capital Management INC | 217.9k | 0.75% | $104.7M | trimmed -2.9% | 2020 Q1 |
| Bank OF America CORP /DE/ | 212.2k | 0.73% | $101.9M | added +0.7% | 2016 Q4 |
| Vulcan Value Partners, LLC (focused) | 203.1k | 0.70% | $97.5M | added +329.3% | 2021 Q2 |
| Franklin Resources | 201.7k | 0.70% | $96.9M | trimmed -32.6% | 2020 Q1 |
| Charles Schwab Investment Management | 196.5k | 0.68% | $94.4M | added +3.5% | 2016 Q3 |
| Gw&k Investment Management, LLC | 182.8k | 0.63% | $87.8M | added +17% | 2020 Q4 |
| Natixis Advisors, LLC | 182.7k | 0.63% | $87.7M | added +11.8% | 2024 Q1 |
| Two Sigma | 176.6k | 0.61% | $84.8M | added +207.7% | 2022 Q4 |
| Clearbridge Investments, LLC | 176.0k | 0.61% | $84.5M | trimmed -14.2% | 2023 Q4 |
| Goldman Sachs | 168.5k | 0.58% | $80.9M | trimmed -51.5% | 2016 Q3 |
| Jones Financial Companies Lllp | 168.2k | 0.58% | $80.8M | added +16553% | 2024 Q3 |
| Stephens Investment Management Group LLC | 162.8k | 0.56% | $78.2M | added +36.7% | 2021 Q3 |
| FMR (Fidelity) | 160.6k | 0.55% | $77.1M | trimmed -21.2% | 2018 Q3 |
| BNY Mellon | 159.2k | 0.55% | $76.5M | unchanged | 2016 Q3 |
| Epoch Investment Partners, INC. | 141.0k | 0.49% | $67.7M | added +386.8% | 2021 Q1 |
| Boston Trust Walden CORP | 140.6k | 0.48% | $67.5M | trimmed -5% | 2020 Q1 |
| Fisher Investments | 135.7k | 0.47% | $65.2M | trimmed -2.2% | 2017 Q1 |
| Turtle Creek Asset Management INC. (focused) | 135.6k | 0.47% | $65.1M | added +4741.8% | 2025 Q2 |
| Connor, Clark & Lunn Investment Management LTD. | 134.8k | 0.47% | $64.8M | trimmed -5.3% | 2021 Q2 |
| TD Asset Management INC | 133.1k | 0.46% | $63.9M | added +158.2% | 2021 Q1 |
| Envestnet Asset Management INC | 133.0k | 0.46% | $63.9M | added +6.5% | 2018 Q4 |
| Raymond James Financial INC | 131.4k | 0.45% | $63.1M | added +47.1% | 2018 Q3 |
| Caisse de depot et placement du Quebec | 130.2k | 0.45% | $62.6M | added +62.4% | 2024 Q3 |
| Janus Henderson | 125.0k | 0.43% | $60.0M | added +21% | 2019 Q1 |
| Royal Bank OF Canada | 123.9k | 0.43% | $59.5M | added +3.3% | 2016 Q3 |
| Assenagon Asset Management S.a. | 116.3k | 0.40% | $55.9M | added +1499.6% | 2025 Q4 |
| Nordea Investment Management AB | 113.5k | 0.39% | $54.5M | added +77.9% | 2019 Q4 |
| Smith Group Asset Management, LLC | 103.6k | 0.36% | $49.8M | added +9.3% | 2023 Q4 |
Largest 50 of 707 shown; the full ranked, searchable register is at boothcheck.com/holders/MEDP. 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.