Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,018 institutional managers reported holding GSK for the quarter ended Mar 31, 2026. Together they hold about 19% of shares outstanding; the top 10 hold 13%. 134 opened new positions; 106 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 67.66M | 3.34% | $3.73B | unchanged | ≤2013 |
| Dodge & Cox | 58.66M | 2.90% | $3.24B | trimmed -14.4% | ≤2013 |
| Fisher Investments | 34.52M | 1.70% | $1.90B | added +4% | ≤2013 |
| PRIMECAP Management | 25.20M | 1.24% | $1.39B | unchanged | ≤2013 |
| Pacer Advisors, INC. | 16.03M | 0.79% | $884.5M | added +274.5% | 2017 Q2 |
| Acadian Asset Management | 11.80M | 0.58% | $650.9M | added +31.6% | 2021 Q1 |
| Wellington Management | 11.72M | 0.58% | $646.5M | trimmed -6.7% | 2022 Q3 |
| Morgan Stanley | 11.03M | 0.55% | $608.6M | added +89.2% | ≤2013 |
| Goldman Sachs | 9.59M | 0.47% | $529.1M | added +32.5% | ≤2013 |
| JTC Employer Solutions Trustee LTD | 9.04M | 0.45% | $498.9M | trimmed -37.3% | 2021 Q2 |
| Royal Bank OF Canada | 7.51M | 0.37% | $414.2M | trimmed -11.5% | ≤2013 |
| T. Rowe Price | 7.32M | 0.36% | $404.0M | trimmed -7.2% | ≤2013 |
| State Street | 6.00M | 0.30% | $331.0M | trimmed -4.1% | ≤2013 |
| Holocene Advisors | 5.52M | 0.27% | $304.5M | trimmed -32% | 2023 Q1 |
| Mondrian Investment Partners LTD | 4.99M | 0.25% | $275.2M | trimmed -14.1% | ≤2013 |
| Bank OF Montreal /CAN/ | 4.64M | 0.23% | $256.0M | added +78.5% | ≤2013 |
| BlackRock | 3.55M | 0.17% | $195.9M | added +95.7% | ≤2013 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 3.52M | 0.17% | $194.4M | added +1% | 2016 Q1 |
| Hotchkis & Wiley Capital Management LLC | 3.48M | 0.17% | $192.1M | trimmed -4.8% | 2014 Q1 |
| Equity Investment CORP | 3.22M | 0.16% | $177.7M | trimmed -21.6% | 2016 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 2.82M | 0.14% | $155.5M | added +62.2% | 2024 Q2 |
| Dimensional Fund Advisors | 2.59M | 0.13% | $142.7M | added +3.5% | ≤2013 |
| Manufacturers Life Insurance Company, THE | 2.38M | 0.12% | $131.2M | trimmed -35.2% | 2021 Q2 |
| SEI Investments CO | 2.29M | 0.11% | $126.2M | added +40.1% | 2013 Q4 |
| Bank OF America CORP /DE/ | 2.21M | 0.11% | $121.7M | trimmed -41.2% | ≤2013 |
| BNP Paribas Financial Markets | 2.16M | 0.11% | $119.0M | added +240.4% | 2024 Q4 |
| UBS | 2.12M | 0.10% | $117.2M | trimmed -66.2% | ≤2013 |
| Envestnet Asset Management INC | 1.84M | 0.09% | $101.4M | trimmed -30.5% | ≤2013 |
| Eversept Partners, LP | 1.79M | 0.09% | $98.5M | trimmed -33.4% | 2018 Q1 |
| Northern Trust | 1.75M | 0.09% | $96.5M | added +2.8% | ≤2013 |
| Letko, Brosseau & Associates INC | 1.64M | 0.08% | $90.7M | trimmed -1.8% | ≤2013 |
| Miller Howard Investments INC /NY | 1.63M | 0.08% | $89.9M | trimmed -0.8% | 2024 Q4 |
| Arrowstreet Capital | 1.62M | 0.08% | $89.5M | trimmed -28.4% | 2025 Q4 |
| American Century Companies INC | 1.62M | 0.08% | $89.2M | added +31.2% | 2019 Q4 |
| Aristotle Capital Management, LLC | 1.53M | 0.07% | $84.3M | trimmed -2.1% | 2021 Q1 |
| Citigroup INC | 1.50M | 0.07% | $82.5M | added +675.1% | ≤2013 |
| Brandes Investment Partners, LP | 1.45M | 0.07% | $80.2M | trimmed -15.7% | ≤2013 |
| Wells Fargo & COMPANY/MN | 1.41M | 0.07% | $77.5M | trimmed -44.6% | ≤2013 |
| Raymond James Financial INC | 1.37M | 0.07% | $75.7M | trimmed -44.6% | ≤2013 |
| Callodine Capital Management, LP | 1.26M | 0.06% | $69.5M | added +25.4% | 2022 Q4 |
| Mariner, LLC | 1.23M | 0.06% | $67.9M | unchanged | 2018 Q1 |
| Alyeska Investment Group | 1.21M | 0.06% | $66.8M | added +254.4% | 2025 Q1 |
| VAN ECK Associates CORP | 1.07M | 0.05% | $58.9M | trimmed -10.7% | ≤2013 |
| Russell Investments Group, LTD. | 1.05M | 0.05% | $58.0M | added +13.2% | 2020 Q4 |
| Douglas Lane & Associates, LLC | 1.01M | 0.05% | $55.7M | trimmed -3.4% | 2019 Q3 |
| LMR Partners LLP | 980.5k | 0.05% | $54.1M | opened | 2024 Q1 |
| Franklin Resources | 942.4k | 0.05% | $52.0M | added +342.9% | ≤2013 |
| LPL Financial LLC | 884.0k | 0.04% | $48.8M | trimmed -44.1% | ≤2013 |
| BNY Mellon | 808.1k | 0.04% | $44.6M | trimmed -13.8% | ≤2013 |
| NEW York State Common Retirement Fund | 728.5k | 0.04% | $40.2M | added +47.3% | 2021 Q3 |
Largest 50 of 1,018 shown; the full ranked, searchable register is at boothcheck.com/holders/GSK. 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.