VANGUARD GROUP INC
Rank #1
9.21%
- Shares
- 34.13M
- Change
- +288.30K
- Change %
- +85.00%
- Filing
- Dec 31, 2025
Increased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
NYSE · HEALTHCARE · Holders
Thermo Fisher Scientific Inc (TMO) Institutional Ownership & Insider Trading History
Top TMO institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Ownership read
TMO insider sentiment: Net selling.
VANGUARD GROUP INC is the largest loaded institutional holder. 72 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
TMO
Purchases—
Sales287.82K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
34.13M
VANGUARD GROUP INC
Insider stance
Net selling
$66.39M sold / — bought
Latest filing
May 20, 2026
Most recent holder or insider filing date
Rows loaded
240
120 holder / 120 insider
- Holder rows
- 120
- Market data feed
- Latest filing
- May 20, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 55
- 64 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
Thermo Fisher Scientific Inc (TMO) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where the ownership feed supplies them.
BLACKROCK
Rank #2
8.21%
- Shares
- 30.43M
- Change
- -250.69K
- Change %
- -82.00%
- Filing
- Mar 31, 2026
Decreased
VANGUARD CAPITAL MANAGEMENT LLC
Rank #3
6.55%
- Shares
- 24.28M
- Change
- +24.28M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
STATE STREET CORP
Rank #4
4.51%
- Shares
- 16.73M
- Change
- +117.91K
- Change %
- +71.00%
- Filing
- Mar 31, 2026
Increased
MORGAN STANLEY
Rank #5
2.93%
- Shares
- 10.86M
- Change
- -1.03M
- Change %
- -8.67%
- Filing
- Mar 31, 2026
Decreased
FMR LLC
Rank #6
2.91%
- Shares
- 10.78M
- Change
- +983.09K
- Change %
- +10.04%
- Filing
- Mar 31, 2026
Increased
GEODE CAPITAL MANAGEMENT
Rank #7
2.27%
- Shares
- 8.41M
- Change
- +211.41K
- Change %
- +2.58%
- Filing
- Mar 31, 2026
Increased
FRANKLIN RESOURCES INC
Rank #8
1.84%
- Shares
- 6.81M
- Change
- +466.52K
- Change %
- +7.35%
- Filing
- Mar 31, 2026
Increased
JPMORGAN CHASE & CO
Rank #9
1.83%
- Shares
- 6.80M
- Change
- +183.60K
- Change %
- +2.78%
- Filing
- Mar 31, 2026
Increased
CAPITAL WORLD INVESTORS
Rank #10
1.79%
- Shares
- 6.65M
- Change
- -4.36M
- Change %
- -39.60%
- Filing
- Mar 31, 2026
Decreased
PRICE T ROWE ASSOCIATES INC
Rank #11
1.70%
- Shares
- 6.32M
- Change
- -1.39M
- Change %
- -18.00%
- Filing
- Mar 31, 2026
Decreased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #12
1.66%
- Shares
- 6.16M
- Change
- +6.16M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
BANK OF AMERICA CORP
Rank #13
1.49%
- Shares
- 5.53M
- Change
- -412.44K
- Change %
- -6.94%
- Filing
- Mar 31, 2026
Decreased
NORGES BANK
Rank #14
1.43%
- Shares
- 5.30M
- Change
- -282.43K
- Change %
- -5.06%
- Filing
- Dec 31, 2025
Decreased
CAPITAL RESEARCH GLOBAL INVESTORS
Rank #15
1.19%
- Shares
- 4.41M
- Change
- +1.50M
- Change %
- +51.45%
- Filing
- Mar 31, 2026
Increased
ROYAL BANK OF CANADA
Rank #16
1.06%
- Shares
- 3.91M
- Change
- -122.34K
- Change %
- -3.03%
- Filing
- Mar 31, 2026
Decreased
CAPITAL INTERNATIONAL INVESTORS
Rank #17
1.05%
- Shares
- 3.89M
- Change
- +2.97M
- Change %
- +3.23%
- Filing
- Mar 31, 2026
Increased
BANK OF NEW YORK MELLON CORP
Rank #18
1.02%
- Shares
- 3.77M
- Change
- +42.14K
- Change %
- +1.13%
- Filing
- Mar 31, 2026
Increased
NORTHERN TRUST CORP
Rank #19
0.92%
- Shares
- 3.42M
- Change
- -33.71K
- Change %
- -98.00%
- Filing
- Mar 31, 2026
Decreased
GOLDMAN SACHS GROUP INC
Rank #20
0.85%
- Shares
- 3.16M
- Change
- +90.34K
- Change %
- +2.95%
- Filing
- Mar 31, 2026
Increased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 9.21% | 34.13M | +288.30K Increased | +85.00% | Dec 31, 2025 | |
| 2 | 8.21% | 30.43M | -250.69K Decreased | -82.00% | Mar 31, 2026 | |
| 3 | 6.55% | 24.28M | +24.28M Initiated | — | Mar 31, 2026 | |
| 4 | 4.51% | 16.73M | +117.91K Increased | +71.00% | Mar 31, 2026 | |
| 5 | 2.93% | 10.86M | -1.03M Decreased | -8.67% | Mar 31, 2026 | |
| 6 | 2.91% | 10.78M | +983.09K Increased | +10.04% | Mar 31, 2026 | |
| 7 | 2.27% | 8.41M | +211.41K Increased | +2.58% | Mar 31, 2026 | |
| 8 | 1.84% | 6.81M | +466.52K Increased | +7.35% | Mar 31, 2026 | |
| 9 | 1.83% | 6.80M | +183.60K Increased | +2.78% | Mar 31, 2026 | |
| 10 | 1.79% | 6.65M | -4.36M Decreased | -39.60% | Mar 31, 2026 | |
| 11 | 1.70% | 6.32M | -1.39M Decreased | -18.00% | Mar 31, 2026 | |
| 12 | 1.66% | 6.16M | +6.16M Initiated | — | Mar 31, 2026 | |
| 13 | 1.49% | 5.53M | -412.44K Decreased | -6.94% | Mar 31, 2026 | |
| 14 | 1.43% | 5.30M | -282.43K Decreased | -5.06% | Dec 31, 2025 | |
| 15 | 1.19% | 4.41M | +1.50M Increased | +51.45% | Mar 31, 2026 | |
| 16 | ROYAL BANK OF CANADA | 1.06% | 3.91M | -122.34K Decreased | -3.03% | Mar 31, 2026 |
| 17 | CAPITAL INTERNATIONAL INVESTORS | 1.05% | 3.89M | +2.97M Increased | +3.23% | Mar 31, 2026 |
| 18 | BANK OF NEW YORK MELLON CORP | 1.02% | 3.77M | +42.14K Increased | +1.13% | Mar 31, 2026 |
| 19 | 0.92% | 3.42M | -33.71K Decreased | -98.00% | Mar 31, 2026 | |
| 20 | 0.85% | 3.16M | +90.34K Increased | +2.95% | Mar 31, 2026 |
Showing 20 of 120 matching institutional rows.Load more institutions
Recent insider transactions
Thermo Fisher Scientific Inc (TMO) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
HARRIS, C MARTIN
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
KEITH, R. ALEXANDRA
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
JACKS, TYLER
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
JOHNSON, JENNIFER M
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
WEISLER, DION J
Director
- Shares
- 80
- % company
- <0.01%
- Price
- $451.79
- Value
- $36,273
Filed May 20, 2026
WEISLER, DION J
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
SPERLING, SCOTT M
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
SPAR, DEBORA L
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
CHAI, NELSON
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
CHANDY, RUBY R
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
LYNCH, KAREN S
Director
- Shares
- 499
- % company
- <0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 20, 2026
PETTITI, GIANLUCA
President & COO
- Shares
- 400
- % company
- <0.01%
- Price
- $462.66
- Value
- $185,064
Filed Apr 27, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | HARRIS, C MARTIN Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 2 | KEITH, R. ALEXANDRA Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 3 | JACKS, TYLER Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 4 | JOHNSON, JENNIFER M Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 5 | WEISLER, DION J Director | <0.01% | Sale to issuer | 80 | $451.79 | $36,273 | May 20, 2026 |
| 6 | WEISLER, DION J Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 7 | SPERLING, SCOTT M Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 8 | SPAR, DEBORA L Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 9 | CHAI, NELSON Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 10 | CHANDY, RUBY R Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 11 | LYNCH, KAREN S Director | <0.01% | Award / grant | 499 | No cash value | No cash value | May 20, 2026 |
| 12 | PETTITI, GIANLUCA President & COO | <0.01% | Sale to issuer | 400 | $462.66 | $185,064 | Apr 27, 2026 |
Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest TMO shareholders?
VANGUARD GROUP INC is the largest institutional holder in the loaded TMO ownership feed, with 34.13 million shares, or about 9.21% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of TMO?
The current TECHi snapshot has 120 loaded institutional rows for Thermo Fisher Scientific Inc. 55 rows are marked increased or initiated, while 64 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Thermo Fisher Scientific Inc insider transactions?
The insider transaction table currently shows 120 loaded Form 4 rows for TMO, with the latest insider filing dated May 20, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are TMO insiders buying or selling?
The loaded TMO Form 4 rows currently read Net selling: 72 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active TMO insider in the loaded filings?
LAGARDE, MICHEL is the most active insider by absolute share movement in the loaded TMO rows, with 376,840 shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.