Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
2,252 institutional managers reported holding ISRG for the quarter ended Mar 31, 2026. Together they hold about 80% of shares outstanding; the top 10 hold 36%. 161 opened new positions; 281 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 33.99M | 9.45% | $15.67B | added +0.9% | ≤2013 |
| BlackRock | 30.08M | 8.36% | $13.86B | trimmed -1.4% | ≤2013 |
| State Street | 15.85M | 4.40% | $7.30B | added +0.9% | ≤2013 |
| T. Rowe Price | 12.52M | 3.48% | $5.77B | unchanged | ≤2013 |
| Geode Capital | 8.47M | 2.35% | $3.90B | added +2.9% | ≤2013 |
| Capital Group (American Funds) | 8.05M | 2.24% | $3.71B | added +2.4% | ≤2013 |
| Morgan Stanley | 6.06M | 1.68% | $2.79B | added +5.5% | ≤2013 |
| FMR (Fidelity) | 5.48M | 1.52% | $2.52B | trimmed -16.7% | ≤2013 |
| UBS | 4.95M | 1.38% | $2.28B | added +4.1% | ≤2013 |
| Wellington Management | 3.96M | 1.10% | $1.82B | added +14.9% | ≤2013 |
| Fisher Investments | 3.85M | 1.07% | $1.78B | added +1.8% | 2018 Q1 |
| AllianceBernstein | 3.81M | 1.06% | $1.76B | added +2.5% | ≤2013 |
| Invesco | 3.74M | 1.04% | $1.72B | trimmed -9.5% | ≤2013 |
| Bank OF America CORP /DE/ | 3.62M | 1.00% | $1.67B | added +3.3% | ≤2013 |
| BNY Mellon | 3.55M | 0.99% | $1.64B | trimmed -9.4% | ≤2013 |
| Northern Trust | 3.50M | 0.97% | $1.62B | trimmed -0.6% | ≤2013 |
| Jennison Associates LLC | 3.04M | 0.84% | $1.40B | trimmed -5.2% | 2017 Q4 |
| Charles Schwab Investment Management | 2.62M | 0.73% | $1.21B | added +2.7% | ≤2013 |
| Nuveen | 2.62M | 0.73% | $1.21B | trimmed -4% | 2014 Q1 |
| Baillie Gifford | 2.57M | 0.71% | $1.18B | added +0.6% | ≤2013 |
| Legal & General Group PLC | 2.48M | 0.69% | $1.14B | added +1.1% | ≤2013 |
| Goldman Sachs | 2.45M | 0.68% | $1.13B | added +1.4% | ≤2013 |
| Amundi | 2.43M | 0.68% | $1.12B | added +8.6% | 2017 Q4 |
| Franklin Resources | 2.34M | 0.65% | $1.08B | trimmed -8.6% | ≤2013 |
| American Century Companies INC | 2.11M | 0.59% | $972.4M | unchanged | ≤2013 |
| Arrowstreet Capital | 2.11M | 0.58% | $970.5M | added +95.3% | 2020 Q1 |
| Royal Bank OF Canada | 1.88M | 0.52% | $867.7M | trimmed -12% | ≤2013 |
| BNP Paribas Financial Markets | 1.83M | 0.51% | $844.2M | trimmed -21.5% | ≤2013 |
| Assenagon Asset Management S.a. | 1.75M | 0.48% | $804.3M | added +13.8% | 2016 Q4 |
| Loomis Sayles & CO L P | 1.70M | 0.47% | $783.5M | trimmed -0.9% | 2020 Q1 |
| Janus Henderson | 1.64M | 0.46% | $757.4M | added +3.7% | ≤2013 |
| Barclays PLC | 1.59M | 0.44% | $734.0M | trimmed -28.8% | ≤2013 |
| Edgewood Management | 1.56M | 0.43% | $717.2M | trimmed -14.1% | ≤2013 |
| CPP Investment Board | 1.50M | 0.42% | $690.8M | added +7.3% | ≤2013 |
| Sumitomo Mitsui Trust Group, INC. | 1.47M | 0.41% | $675.7M | added +3.2% | ≤2013 |
| Two Sigma | 1.41M | 0.39% | $647.8M | added +205.6% | 2019 Q4 |
| Clearbridge Investments, LLC | 1.37M | 0.38% | $629.2M | trimmed -18.9% | 2019 Q4 |
| Citadel Advisors | 1.36M | 0.38% | $625.0M | added +30.3% | 2020 Q4 |
| Deutsche Bank AG\ | 1.35M | 0.38% | $622.0M | trimmed -11.3% | ≤2013 |
| Sands Capital | 1.32M | 0.37% | $609.0M | trimmed -4% | 2025 Q1 |
| Ameriprise Financial INC | 1.31M | 0.36% | $603.9M | trimmed -15.5% | ≤2013 |
| Victory Capital Management INC | 1.30M | 0.36% | $599.0M | trimmed -12.4% | 2015 Q2 |
| Brown Advisory INC | 1.27M | 0.35% | $584.9M | trimmed -16.5% | ≤2013 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 1.23M | 0.34% | $567.4M | added +3.8% | 2022 Q2 |
| Mitsubishi UFJ Asset Management CO., LTD. | 1.23M | 0.34% | $565.5M | added +7.5% | ≤2013 |
| Pictet Asset Management Holding SA | 1.22M | 0.34% | $563.5M | added +6.3% | ≤2013 |
| Fayez Sarofim & CO | 1.21M | 0.34% | $558.8M | added +3.4% | 2016 Q1 |
| Winslow Capital Management, LLC | 1.16M | 0.32% | $534.9M | trimmed -8.6% | 2021 Q4 |
| Mirae Asset Global Etfs Holdings LTD. | 1.11M | 0.31% | $511.2M | added +17.6% | 2016 Q1 |
| Wells Fargo & COMPANY/MN | 1.05M | 0.29% | $482.6M | added +1.1% | ≤2013 |
Largest 50 of 2,252 shown; the full ranked, searchable register is at boothcheck.com/holders/ISRG. 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.