Who owns TMO
Institutions that file 13Fs hold 91% of the shares
Shares they hold, quarter on quarter
+0.9%
202 new, 878 added, 1073 cut, 192 sold out
Top 10 holders
40%
of the shares institutions hold
A 13F lists the long positions of managers with more than $100M in US stocks. It shows the last day of a quarter and is filed up to 45 days later. Two managers can report the same shares, so totals can count some shares twice.
Institutional owners
The 25 biggest holders
| Holder | Shares | Value | % of company | From Mar 31, 2026 |
|---|---|---|---|---|
| BlackRock, Inc. | 30.92M | $15.5B | 8.35% | Added +1.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 24.28M | $12.2B | 6.55% | Held |
| STATE STREET CORP | 16.83M | $8.4B | 4.54% | Added +0.6% |
| FMR LLC | 14.08M | $7.1B | 3.80% | Added +30.7% |
| MORGAN STANLEY | 10.76M | $5.4B | 2.90% | Reduced -0.9% |
| JPMORGAN CHASE & CO | 8.50M | $4.3B | 2.30% | Added +25.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 8.38M | $4.2B | 2.26% | Held |
| FRANKLIN RESOURCES INC | 7.27M | $3.6B | 1.96% | Added +6.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.23M | $3.1B | 1.68% | Added +1.0% |
| Capital World Investors | 6.20M | $3.1B | 1.67% | Reduced -6.8% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 5.12M | $2.6M | 1.38% | Reduced -19.0% |
| NORGES BANK | 5.09M | $2.6B | 1.37% | New |
| Capital Research Global Investors | 4.15M | $2.1B | 1.12% | Reduced -6.0% |
| Bank of New York Mellon Corp | 3.94M | $2.0B | 1.06% | Added +4.6% |
| BANK OF AMERICA CORP /DE/ | 3.90M | $2.0B | 1.05% | Reduced -29.6% |
| ROYAL BANK OF CANADA | 3.43M | $1.7B | 0.93% | Reduced -12.3% |
| NORTHERN TRUST CORP | 3.33M | $1.7B | 0.90% | Reduced -2.5% |
| Capital International Investors | 3.18M | $1.6B | 0.86% | Reduced -18.2% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 3.11M | $1.6B | 0.84% | Added +6.1% |
| Dodge & Cox | 3.05M | $1.5B | 0.82% | Added ×119 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.97M | $2.3B | 0.80% | Reduced -1.6% |
| GOLDMAN SACHS GROUP INC | 2.96M | $1.5B | 0.80% | Reduced -6.3% |
| Fisher Asset Management, LLC | 2.92M | $1.5B | 0.79% | Added +2.2% |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 2.76M | $1.4B | 0.74% | Reduced -5.4% |
| Grantham, Mayo, Van Otterloo & Co. LLC | 2.74M | $1.4B | 0.74% | Added +9.5% |
Show the other 15 holders
This quarter
Who bought and who sold the most shares
Bought the most shares
- NORGES BANK +5.09M, new
- FMR LLC +3.31M
- Dodge & Cox +3.03M
- JPMORGAN CHASE & CO +1.71M
- SG Americas Securities, LLC +793K
- Jupiter Topco LLC +673K, new
- Assenagon Asset Management S.A. +497K
- BlackRock, Inc. +492K
- FRANKLIN RESOURCES INC +458K
- GLENVIEW CAPITAL MANAGEMENT, LLC +377K
Sold the most shares
- BANK OF AMERICA CORP /DE/ -1.64M
- PRICE T ROWE ASSOCIATES INC /MD/ -1.20M
- Pictet Asset Management Holding SA -988K
- Rathbones Group PLC -902K
- GENERATION INVESTMENT MANAGEMENT LLP -774K, sold out
- Cantillon Capital Management LLC -770K, sold out
- Capital International Investors -707K
- JANUS HENDERSON GROUP PLC -660K, sold out
- C WorldWide Group Holding A/S -535K
- WELLINGTON MANAGEMENT GROUP LLP -499K
Superinvestors
Superinvestors holding TMO
| Investor | Quarter | Shares | Value | % of portfolio | Last quarter |
|---|---|---|---|---|---|
| Dodge & Cox Dodge & Cox | Jun 30, 2026 | 3.05M | $1.5B | 0.82% | Added ×119 |
| Andreas Halvorsen Viking Global Investors | Jun 30, 2026 | 1.94M | $971.3M | 2.77% | Added +16.1% |
| Wally Weitz Weitz Investment Management | Jun 30, 2026 | 115K | $57.8M | 4.28% | Reduced -4.8% |
| Tom Gayner Markel Group | Sep 30, 2026 | 74K | $50.0M | 0.42% | Added +1.4% |
| Stanley Druckenmiller Duquesne Family Office | Jun 30, 2026 | 19K | $9.6M | 0.22% | New |
Sold out last quarter: William von Mueffling
More than 5%
13D filings: owners who may push for change
No Schedule 13D about TMO in the last year.