Thermo Fisher Scientific Inc
Held by 26 tracked managers as of Q2 2026 · CUSIP ⓘCUSIP: A 9-character ID for one specific security - one share class of one company, or one bond. Tickers can change and can mean different things in different countries; a CUSIP always identifies exactly the same security, which is why filings use it. Guide 883556102 · Sector ⓘGICS sectors: The 11-sector system most investors know (Global Industry Classification Standard): Technology, Health Care, Financials and so on. This site assigns each company a GICS-style sector from its SIC code, with a few hand corrections, so sector pages match the names investors expect. Guide
In plain English: 26 of the investors we track own this stock. In the latest quarter, 15 of them bought more of it and 9 sold some or all of theirs (3 bought it for the first time). That tells you what they did last quarter — not what the stock will do next.
Educational and informational only, not personalized investment advice. Based on public filings that may be delayed or contain errors; verify with the original filings. Disclaimer
Managers holding
26
+2 vs last quarter (like-for-like)
Total value held
$10.77B
Across tracked managers
Average weight ⓘOn average, how big this stock is in the portfolios that own it (its share of each manager's reported portfolio value).
0.9%
Of each manager's book
QoQ value ⓘLike-for-like: only managers that filed both quarters are compared, so a manager filing late (or confidentially) does not look like buying or selling. Includes price changes.
+$2.11B
+34.6% vs last quarter
Net shares bought
+4.0M
Est. net flow +$1.99B
Quarter activity
15 bought · 9 sold
3 new · 1 sold out
Tracked capital in this stock
Total value held (area) and number of managers (line). Dips can mean a large holder filed that quarter confidentially (e.g. Norges Bank in Q1/Q3).
Aggregate buying and selling
Net share change reported each quarter
Who owns TMO?
🔒 The 'who added and who trimmed' chart is a Plus feature
You're viewing the Free plan. Upgrade to unlock The 'who added and who trimmed' chart — every paid plan starts with a 7-day free trial, and you can cancel in two clicks.
Who owns TMO? — Q2 2026
Holders ranked by position size, with each one's quarter-over-quarter change.
Column filters
| # | Manager | Fund | Shares | Value ↓ | % of their portfolio | QoQ | Δ shares | Δ shares % | Est. Δ value ⓘChange in shares × this quarter's price |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Norges Bank | Norges Bank Investment Management | 5.09M | $2.55B | 0.3% | — | — | — | — |
| 2 | Dodge & Cox | Dodge & Cox | 3.05M | $1.53B | 0.8% | Added | +3.0M | +11767.4% | +$1.52B |
| 3 | Ken Fisher | Fisher Asset Management | 2.92M | $1.46B | 0.4% | Added | +64.1K | +2.2% | +$32.16M |
| 4 | Jeremy Grantham | GMO | 2.74M | $1.37B | 3.1% | Added | +237.0K | +9.5% | +$118.81M |
| 5 | Andreas Halvorsen | Viking Global Investors | 1.94M | $971.34M | 2.8% | Added | +269.4K | +16.2% | +$135.06M |
| 6 | Parnassus Investments | Parnassus Investments LLC | 1.64M | $822.02M | 2.2% | Added | +134.9K | +9.0% | +$67.65M |
| 7 | Baillie Gifford | Baillie Gifford & Co | 645.65K | $323.70M | 0.3% | Reduced | -52.8K | -7.6% | -$26.47M |
| 8 | David Shaw | D.E. Shaw & Co. | 641.64K | $321.69M | 0.2% | Added | +338.8K | +111.9% | +$169.86M |
| 9 | Larry Robbins | Glenview Capital | 627.24K | $314.47M | 6.3% | Added | +376.7K | +150.4% | +$188.87M |
| 10 | Ken Griffin | Citadel Advisors | 574.99K | $288.28M | 0.2% | Reduced | -289.5K | -33.5% | -$145.14M |
| 11 | Select Equity Group | Select Equity Group | 352.70K | $176.83M | 0.9% | Added | +53.2K | +17.8% | +$26.67M |
| 12 | Steve Cohen | Point72 Asset Management | 277.74K | $139.25M | 0.2% | Reduced | -75.8K | -21.4% | -$38.01M |
| 13 | Diamond Hill | Diamond Hill Capital Management | 252.56K | $126.62M | 1.0% | Reduced | -108.1K | -30.0% | -$54.19M |
| 14 | First Pacific Advisors | First Pacific Advisors, LP | 248.24K | $124.46M | 1.5% | Added | +26.3K | +11.9% | +$13.21M |
| 15 | Israel Englander | Millennium Management | 165.47K | $82.96M | 0.1% | Added | +94.8K | +134.1% | +$47.52M |
| 16 | Sound Shore Management | Sound Shore Management Inc | 165.32K | $82.88M | 2.6% | New | +165.3K | — | +$82.88M |
| 17 | Tom Gayner | Markel Group | 73.10K | $36.65M | 0.3% | Added | +6.0K | +8.9% | +$3.01M |
| 18 | Stanley Druckenmiller | Duquesne Family Office | 19.20K | $9.63M | 0.2% | New | +19.2K | — | +$9.63M |
| 19 | Two Sigma | Two Sigma Investments | 17.01K | $8.53M | 0.0% | Reduced | -170.9K | -90.9% | -$85.67M |
| 20 | Ray Dalio | Bridgewater Associates | 12.95K | $6.49M | 0.0% | Reduced | -1.5K | -10.6% | -$771.59K |
| 21 | Boston Partners | Boston Partners Global Investors | 10.82K | $5.43M | 0.0% | Added | +3.3K | +44.0% | +$1.66M |
| 22 | Ron Baron | Baron Capital (BAMCO) | 9.22K | $4.62M | 0.0% | Reduced | -14.5K | -61.1% | -$7.25M |
| 23 | Mario Gabelli | GAMCO Investors | 4.06K | $2.04M | 0.0% | Reduced | -473 | -10.4% | -$237.14K |
| 24 | Fred Alger | Fred Alger Management | 3.18K | $1.59M | 0.0% | New | +3.2K | — | +$1.59M |
| 25 | Beutel Goodman | Beutel, Goodman & Co | 2.36K | $1.18M | 0.0% | Held | 0 | 0.0% | $0 |
| 26 | LSV Asset Management | LSV Asset Management | 900 | $451.00K | 0.0% | Held | 0 | 0.0% | $0 |
Column filters
| Manager | Fund | Shares sold | Value last quarter ↓ |
|---|---|---|---|
| Jim Simons | Renaissance Technologies | -139.0K | $68.30M |
Politician trades
Column filters
| Politician | Date | Ticker | Asset | Type | Reported range ⓘThe dollar range the politician reported. Exact amounts are not disclosed. | Est. size ⓘOur estimate only: the midpoint of the reported range. | Owner | Account ⓘSubholding Of: the account the trade was in, as named on the report (e.g. an IRA or a brokerage account). The same stock bought on the same day in different accounts is a separate trade in each account. | Filed ↓ | Filing delay ⓘDays between the trade and the report. Over 45 days is late under the STOCK Act. | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Michael A. Rulli Politician | Dec 12, 2024 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Merrill Lynch Managed Account | Aug 7, 2026 | 603 days Late | PTR ↗ |
| Dan Newhouse Politician | Jul 10, 2026 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Edward Jones IRA | Jul 17, 2026 | 7 days | PTR ↗ |
| Ro Khanna Politician | Jun 30, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jul 6, 2026 | 6 days | PTR ↗ |
| Ro Khanna Politician | May 1, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMIN scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Jun 9, 2026 | 39 days | PTR ↗ |
| Ro Khanna Politician | May 27, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMIN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jun 9, 2026 | 13 days | PTR ↗ |
| Dwight Evans Politician | May 7, 2026 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | CETERA | May 15, 2026 | 8 days | PTR ↗ |
| Ro Khanna Politician | Apr 13, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | Spouse | — | May 11, 2026 | 28 days | PTR ↗ |
| Ro Khanna Politician | Apr 24, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | May 11, 2026 | 17 days | PTR ↗ |
| Ro Khanna Politician | Jan 22, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Feb 6, 2026 | 15 days | PTR ↗ |
| Ro Khanna Politician | Jan 12, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Sale (partial) | — | — | — | — | Feb 6, 2026 | 25 days | PTR ↗ |
| Ro Khanna Politician | Jan 22, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Feb 6, 2026 | 15 days | PTR ↗ |
| Ro Khanna Politician | Jan 12, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Sale (partial) | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Feb 6, 2026 | 25 days | PTR ↗ |
| Ro Khanna Politician | Jan 29, 2026 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Exchange | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Feb 6, 2026 | 8 days | PTR ↗ |
| Julia Letlow Politician | Oct 23, 2024 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Merrill Lynch Investment Account #025 | Jan 13, 2026 | 447 days Late | PTR ↗ |
| Julia Letlow Politician | Apr 28, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Merrill Lynch Investment Account #025 | Jan 13, 2026 | 260 days Late | PTR ↗ |
| Julia Letlow Politician | Jul 25, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Self | Merrill Lynch Investment Account #025 | Jan 13, 2026 | 172 days Late | PTR ↗ |
| Ro Khanna Politician | Dec 30, 2025 | TMO | THERMO FISHER SCIENTIFIC INC CMN’ scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | — | Jan 6, 2026 | 7 days | PTR ↗ |
| Ro Khanna Politician | Nov 7, 2025 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Purchase | $15,001 - $50,000 | Est. $32,500 (midpoint of reported range $15,001–$50,000) | — | — | Dec 8, 2025 | 31 days | PTR ↗ |
| Lisa McClain Politician | Oct 31, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab 401K > Schwab 893 | Nov 21, 2025 | 21 days | PTR ↗ |
| Lisa McClain Politician | Oct 30, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab Brokerage Account 924 | Nov 21, 2025 | 22 days | PTR ↗ |
| Lisa McClain Politician | Oct 30, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Charles Schwab 401K > Schwab 893 | Nov 21, 2025 | 22 days | PTR ↗ |
| Val T. Hoyle Politician | Sep 23, 2025 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Sale | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Fidelity Rollover IRA | Oct 10, 2025 | 17 days | PTR ↗ |
| Ro Khanna Politician | Sep 12, 2025 | TMO | THERMO FISHER SCIENTIFIC INC CMIN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Child | — | Oct 3, 2025 | 21 days | PTR ↗ |
| Ro Khanna Politician | Sep 28, 2025 | TMO | THERMO FISHER SCIENTIFIC INC CMN scanned | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | — | — | Oct 3, 2025 | 5 days | PTR ↗ |
| Val T. Hoyle Politician | Oct 29, 2024 | TMO | Thermo Fisher Scientific Inc Common Stock (TMO) [ST] | Purchase | $1,001 - $15,000 | Est. $8,000 (midpoint of reported range $1,001–$15,000) | Spouse | Fidelity Rollover IRA | Sep 12, 2025 | 318 days Late | PTR ↗ |