What is CUSIP 883556102?

CUSIP 883556102 is the security identifier used in SEC filing datasets for TMO - THERMO FISHER SCIENTIFIC INC. - Common Stock.

Who owns TMO - THERMO FISHER SCIENTIFIC INC. - Common Stock based on 13F filings?

2577 institutions reported positions in TMO - THERMO FISHER SCIENTIFIC INC. - Common Stock as of Q1 2026. Open the latest holders period and ownership history tables on this page for position-level details.

Security Snapshot

THERMO FISHER SCIENTIFIC INC. - Common Stock (TMO) Institutional Ownership

CUSIP: 883556102

13F Institutional Holders and Ownership History from Q1 2014 to Q1 2026

Latest Period

Q1 2026

Institutions Reporting

2,577

Shares (Excl. Options)

331,652,748

Price

$491.53

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Security type / class: Equity / Common Stock
Symbol: TMO on NYSE
All holders as of 31 Mar 2026: Q1 2026
Total 13F shares: 331,652,748
Total 13F value: $163,077,481,710
Portfolio coverage rank: 0.13%
Share change: -10,737,977
Value change: -$5,882,207,682
Number of holders: 2,577
Shares outstanding: 371,963,108
SEC-reported price per share: $449.37
Insider filing price: $449.37

13F Shares, Excluding Options vs Price

13F Value, Excluding Options

Total Investors

Key facts

TMO - THERMO FISHER SCIENTIFIC INC. - Common Stock is tracked under CUSIP 883556102.
2577 institutions reported positions in Q1 2026.
1 significant owner is listed from Schedule 13D/13G reporting.

Change

Holder count moved from 2,685 to 2,577 between Q4 2025 and Q1 2026.
SEC-reported value moved from $198,880,448,075 to $163,077,481,710.

Research use

You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Evidence

Source: SEC Form 13F

Latest holder context comes from 2577 institutions filings for Q1 2026.

Open SEC evidence

Security key

883556102

Latest holder period

Q1 2026

13F holders

2,577

13D/G owners

CIK / CUSIP context first

Open Q1 2026 holders TMO full holder history THERMO FISHER SCIENTIFIC INC. SEC filings THERMO FISHER SCIENTIFIC INC. company facts THERMO FISHER SCIENTIFIC INC. insider transactions

Broader feeds

Latest 13F filings Latest 13D/G filings All securities

Recent Quarterly Holder Reports

Open recent reporting periods for CUSIP 883556102:

Q1 2026 (2577 holders) Q4 2025 (2685 holders) Q3 2025 (2487 holders) Q2 2025 (2429 holders) Q1 2025 (2544 holders) Q4 2024 (2590 holders) Q3 2024 (2549 holders) Q2 2024 (2525 holders) Q1 2024 (2505 holders) Q4 2023 (2471 holders)

13D/G owners

Significant owners

Large-stake holder rows connected to Schedule 13D/G evidence.

Rows

Security

TMO

Filer	Ownership	Change %	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
VANGUARD CAPITAL MANAGEMENT LLC	7.5%		$13,059,393,346		28,008,822		Vanguard Capital Management	31 Mar 2026

As of 31 Mar 2026, 2,577 institutional investors reported holding 331,652,748 shares of THERMO FISHER SCIENTIFIC INC. - Common Stock (TMO). This represents 89% of the company’s total 371,963,108 outstanding shares.

13F concentration

Top 25 institutional shareholders

Largest 13F positions for this security by reported shares and value.

Top holder share

49%

Institution	Ownership %	Shares Held	Share Change %	Portfolio %	Holdings Value
BlackRock, Inc.	8.2%	30,427,192	-0.82%	0.26%	$14,955,877,586
VANGUARD CAPITAL MANAGEMENT LLC	6.5%	24,280,816	0%	0.3%	$11,934,749,488
STATE STREET CORP	4.5%	16,731,668	+0.71%	0.28%	$8,231,823,950
MORGAN STANLEY	2.9%	10,863,528	-8.7%	0.32%	$5,339,751,925
FMR LLC	2.9%	10,776,436	+10%	0.28%	$5,296,941,734
GEODE CAPITAL MANAGEMENT, LLC	2.3%	8,407,891	+2.6%	0.26%	$4,114,007,288
FRANKLIN RESOURCES INC	1.8%	6,813,031	+7.4%	0.82%	$3,348,809,232
JPMORGAN CHASE & CO	1.8%	6,795,482	+2.8%	0.22%	$3,262,171,880
Capital World Investors	1.8%	6,646,316	-40%	0.45%	$3,266,681,244
PRICE T ROWE ASSOCIATES INC /MD/	1.7%	6,315,471	-18%	0.36%	$3,104,245,000
VANGUARD PORTFOLIO MANAGEMENT LLC	1.7%	6,163,370	0%	0.16%	$3,029,481,256
BANK OF AMERICA CORP /DE/	1.5%	5,533,403	-6.9%	0.2%	$2,719,834,040
Capital Research Global Investors	1.2%	4,414,621	+51%	0.34%	$2,169,814,556
ROYAL BANK OF CANADA	1.1%	3,913,903	-3%	0.36%	$1,923,802,000
Capital International Investors	1%	3,888,726	+323%	0.45%	$1,911,399,079
Bank of New York Mellon Corp	1%	3,766,614	+1.1%	0.34%	$1,851,404,374
NORTHERN TRUST CORP	0.92%	3,415,610	-0.98%	0.22%	$1,678,874,784
GOLDMAN SACHS GROUP INC	0.85%	3,157,226	+2.9%	0.2%	$1,551,871,239
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0.79%	2,934,842	+3.2%	0.22%	$1,442,562,888
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	0.78%	2,914,918	-17%	1.3%	$1,432,764,301
Fisher Asset Management, LLC	0.77%	2,851,579	+2.1%	0.48%	$1,401,637,491
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0.73%	2,708,369	-12%	0.49%	$1,391,423,142
Grantham, Mayo, Van Otterloo & Co. LLC	0.67%	2,502,206	+3.7%	3.1%	$1,229,910,332
UBS Group AG	0.66%	2,453,453	+5.6%	0.21%	$1,205,945,753
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0.66%	2,449,697	+0.86%	0.25%	$1,204,099,566

Quarter history

Institutional holders across reporting periods

Holder count, reported shares/value, and median price by quarter.

Periods

Latest

Q1 2026

Rows shown

1-25 of 49

Period	13F Shares, Excl. Options	Value, Excl. Options	Value Change	Puts Notional Value	Calls Notional Value	Price (Median)	Investors
2026 Q1	331,652,748	$163,077,481,710	-$5,882,207,682	$1,076,816,622	$768,893,023	$491.53	2,577
2025 Q4	343,209,588	$198,880,448,075	+$6,491,924,580	$1,934,705,761	$1,209,256,183	$579.45	2,685
2025 Q3	330,918,498	$160,434,425,509	-$939,278,690	$1,610,710,732	$2,008,964,140	$485.02	2,487
2025 Q2	333,543,983	$135,263,140,409	+$600,593,869	$1,287,836,786	$1,454,914,388	$405.46	2,429
2025 Q1	332,262,896	$165,122,448,786	-$3,233,149,584	$961,308,168	$871,547,400	$497.60	2,544
2024 Q4	338,500,236	$176,259,958,087	+$285,220,456	$1,301,261,697	$1,047,910,149	$520.23	2,590
2024 Q3	336,017,029	$207,590,861,053	-$1,002,552,096	$1,649,310,079	$1,463,846,672	$618.57	2,549
2024 Q2	338,224,382	$186,983,733,629	+$1,597,360,634	$1,140,950,620	$754,058,848	$553.00	2,525
2024 Q1	336,700,181	$195,584,231,699	-$2,039,744,186	$1,117,554,088	$915,984,969	$581.21	2,505
2023 Q4	341,358,721	$181,225,391,520	-$1,048,026,032	$1,372,644,256	$1,609,336,603	$530.79	2,471
2023 Q3	341,222,039	$172,642,670,730	+$796,613,153	$1,017,166,735	$1,027,322,687	$506.17	2,346
2023 Q2	339,845,026	$177,377,106,109	-$343,685,977	$1,009,778,369	$974,112,597	$521.75	2,368
2023 Q1	339,392,049	$195,556,995,210	-$2,440,326,290	$1,094,314,444	$1,217,096,815	$576.37	2,361
2022 Q4	345,955,336	$190,604,505,357	+$1,002,036,679	$1,246,251,593	$1,415,352,664	$550.69	2,350
2022 Q3	345,593,172	$175,477,712,816	-$673,138,797	$1,008,449,555	$1,141,422,271	$507.19	2,243
2022 Q2	342,593,255	$186,075,132,908	+$892,640,669	$856,416,432	$797,759,550	$543.28	2,263
2022 Q1	343,460,281	$202,881,714,850	-$887,452,301	$1,467,585,820	$800,125,670	$590.65	2,299
2021 Q4	344,730,280	$229,739,567,497	-$130,457,390	$2,181,691,144	$1,422,735,608	$667.24	2,327
2021 Q3	345,151,682	$197,228,912,419	+$1,443,395,433	$1,888,195,862	$1,473,583,876	$571.33	2,116
2021 Q2	342,390,438	$172,667,479,252	-$758,086,603	$1,076,573,455	$986,737,589	$504.47	2,062
2021 Q1	344,293,306	$157,129,069,280	-$1,872,164,016	$791,322,846	$1,147,519,000	$456.38	2,030
2020 Q4	348,186,852	$162,181,415,503	-$1,785,309,331	$1,099,072,238	$922,939,686	$465.78	2,011
2020 Q3	351,796,125	$155,230,022,725	-$529,007,703	$767,220,000	$604,083,000	$441.52	1,833
2020 Q2	352,277,275	$127,625,318,997	+$582,924,270	$480,444,000	$489,089,000	$362.34	1,731
2020 Q1	351,167,013	$99,634,377,150	-$1,624,570,832	$356,186,000	$315,889,000	$283.60	1,660