Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
173 institutional managers reported holding SGRY for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 97%. 27 opened new positions; 32 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Bain Capital Investors LLC (focused) | 49.95M | 38.91% | $593.9M | unchanged | 2017 Q3 |
| Janus Henderson | 13.54M | 10.55% | $161.0M | unchanged | 2022 Q4 |
| Pentwater Capital Management LP | 12.65M | 9.86% | $150.5M | added +26.6% | 2024 Q4 |
| UBS | 11.78M | 9.18% | $140.1M | added +32.3% | 2015 Q4 |
| King Street Capital (focused) | 10.23M | 7.97% | $121.6M | unchanged | 2024 Q3 |
| Vanguard Group | 7.65M | 5.96% | $91.0M | added +1.2% | 2015 Q4 |
| BlackRock | 5.66M | 4.41% | $67.3M | trimmed -0.5% | 2015 Q4 |
| Dimensional Fund Advisors | 5.30M | 4.13% | $63.0M | added +7.9% | 2017 Q2 |
| Clearbridge Investments, LLC | 4.12M | 3.21% | $49.0M | trimmed -2.6% | 2015 Q4 |
| Davidson Kempner | 3.34M | 2.60% | $39.7M | added +40.7% | 2025 Q4 |
| FMR (Fidelity) | 2.19M | 1.71% | $26.1M | trimmed -66.7% | 2016 Q4 |
| Geode Capital | 2.00M | 1.56% | $23.8M | added +3% | 2015 Q4 |
| State Street | 1.95M | 1.52% | $23.2M | added +4.3% | 2015 Q4 |
| T. Rowe Price Investment Management, INC. | 1.95M | 1.52% | $23.2M | added +12612.5% | 2025 Q3 |
| Hsbc Holdings PLC | 1.92M | 1.49% | $22.8M | trimmed -0.8% | 2023 Q3 |
| Glenview Capital (focused) | 1.80M | 1.40% | $21.4M | trimmed -53.3% | 2025 Q2 |
| Goldman Sachs | 1.28M | 1.00% | $15.2M | trimmed -34.7% | 2017 Q4 |
| Bank OF America CORP /DE/ | 1.24M | 0.97% | $14.7M | added +97.9% | 2015 Q4 |
| Charles Schwab Investment Management | 1.11M | 0.86% | $13.2M | added +11.8% | 2015 Q4 |
| LMR Partners LLP | 1.10M | 0.86% | $13.1M | added +205.3% | 2024 Q4 |
| Sea Cliff Partners Management, LP (focused) | 1.04M | 0.81% | $12.4M | added +54.4% | 2025 Q4 |
| Morgan Stanley | 1.01M | 0.79% | $12.0M | trimmed -11.3% | 2015 Q4 |
| Man Group | 946.5k | 0.74% | $11.3M | added +187.9% | 2025 Q4 |
| Whitefort Capital Management, LP (focused) | 911.1k | 0.71% | $10.8M | added +51.9% | 2025 Q2 |
| Raymond James Financial INC | 797.8k | 0.62% | $9.5M | added +13.8% | 2021 Q1 |
| Victory Capital Management INC | 760.3k | 0.59% | $9.0M | trimmed -1% | 2019 Q3 |
| Varde Management, L.p. (focused) | 755.4k | 0.59% | $9.0M | opened | 2026 Q1 |
| Nomura Asset Management International INC. | 723.2k | 0.56% | $8.6M | trimmed -58% | 2024 Q3 |
| Irenic Capital Management LP (focused) | 711.0k | 0.55% | $8.5M | added +740.2% | 2025 Q2 |
| Northern Trust | 678.6k | 0.53% | $8.1M | added +4.3% | 2015 Q4 |
| Manufacturers Life Insurance Company, THE | 638.0k | 0.50% | $7.6M | unchanged | 2019 Q2 |
| Hudson Bay Capital | 607.8k | 0.47% | $7.2M | unchanged | 2024 Q3 |
| Dimension Capital Management LLC | 530.6k | 0.41% | $6.3M | added +36% | 2019 Q2 |
| Millennium Management | 423.8k | 0.33% | $5.0M | added +3132.5% | 2023 Q3 |
| Quinn Opportunity Partners LLC | 413.9k | 0.32% | $4.9M | unchanged | 2025 Q1 |
| Citadel Advisors | 401.6k | 0.31% | $4.8M | trimmed -31.9% | 2018 Q2 |
| Pier Capital, LLC | 322.2k | 0.25% | $3.8M | trimmed -0.8% | 2021 Q4 |
| Clearline Capital LP | 314.1k | 0.24% | $3.7M | added +57.2% | 2025 Q4 |
| BNY Mellon | 301.0k | 0.23% | $3.6M | trimmed -2.4% | 2015 Q4 |
| BNP Paribas Financial Markets | 282.6k | 0.22% | $3.4M | added +141% | 2015 Q4 |
| Tudor Investment | 270.2k | 0.21% | $3.2M | opened | 2026 Q1 |
| SG Americas Securities, LLC | 258.1k | 0.20% | $3.1M | trimmed -54.5% | 2021 Q1 |
| Centiva Capital, LP | 211.3k | 0.17% | $2.5M | added +40.3% | 2023 Q2 |
| Invesco | 208.9k | 0.16% | $2.5M | added +13.9% | 2016 Q1 |
| Rock Springs Capital Management LP | 208.0k | 0.16% | $2.5M | trimmed -32.9% | 2025 Q4 |
| CastleKnight Management LP | 200.7k | 0.16% | $2.4M | unchanged | 2025 Q2 |
| Sirios Capital Management L P | 199.1k | 0.15% | $2.4M | added +288.9% | 2025 Q3 |
| Nuveen | 166.8k | 0.13% | $2.0M | added +0.6% | 2019 Q2 |
| Kennedy Capital Management LLC | 156.6k | 0.12% | $1.9M | trimmed -27.4% | 2017 Q1 |
| Swiss National Bank | 153.5k | 0.12% | $1.8M | added +1.1% | 2016 Q2 |
Largest 50 of 173 shown; the full ranked, searchable register is at boothcheck.com/holders/SGRY. 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.