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TMO in the 13F filings

Thermo Fisher Scientific Inc · CUSIP 883556102

Sector · IndustrialsTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Industrials and automation· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Mar 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 1 May 2026
Managers listing it
42
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q4 2025 and Q1 2026; 27 listed it in both
Shares listed
47,934,025
combined, among listed positions
Reported value
$24.5bn
combined, at the quarter end

1 line marked †. Value as filed implies a price far from other filers'. Each counts in holders and value as filed, and is left out of the net change in shares.

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 23 buyers (opened or added shares) and 23 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -4,141,700.

Managers listing TMO in Q1 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

42 of 42 holders

ActionFiling
Fidelity (FMR LLC)10,776,436$5.3bn0.28%Added+983,08915 May 2026 (the filing on sec.gov)
Capital World Investors6,646,316$3.3bn0.45%Trimmed-4,357,49813 May 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc6,315,471$3.1bn0.36%Trimmed-1,385,88215 May 2026 (the filing on sec.gov)
MFS Investment Management† Value as filed implies a price far from other filers'.3,013,109$2.3bn0.76%Trimmed-74,55714 May 2026 (the filing on sec.gov)
Capital Research Global Investors4,414,621$2.2bn0.34%Added+1,499,72013 May 2026 (the filing on sec.gov)
AllianceBernstein LP2,190,608$1.3bn0.41%Trimmed-258,91515 May 2026 (the filing on sec.gov)
Invesco Ltd2,235,720$1.1bn0.11%Added+72,45912 May 2026 (the filing on sec.gov)
Viking Global Investors LP1,668,025$820m2.29%Added+874,83815 May 2026 (the filing on sec.gov)
Wellington Management Group LLP1,478,251$727m0.14%Trimmed-1,989,98915 May 2026 (the filing on sec.gov)
Neuberger Berman Group LLC885,570$435m0.33%Trimmed-14,24627 Oct 2026 (the filing on sec.gov)
Farallon Capital Management LLC881,485$433m2.27%Added+245,80015 May 2026 (the filing on sec.gov)
Citadel Advisors LLC864,489$425m0.07%Added+174,08415 May 2026 (the filing on sec.gov)
D1 Capital Partners LP725,005$356m3.17%Newnew15 May 2026 (the filing on sec.gov)
Baillie Gifford & Co698,441$343m0.35%Trimmed-72,4278 May 2026 (the filing on sec.gov)
Janus Henderson Group Ltd660,258$325m0.15%Trimmed-436,70118 May 2026 (the filing on sec.gov)
Arrowstreet Capital LP634,369$312m0.17%Trimmed-233,14314 May 2026 (the filing on sec.gov)
Balyasny Asset Management LLC555,473$273m0.35%Added+546,96915 May 2026 (the filing on sec.gov)
Marshall Wace LLP477,250$235m0.23%Trimmed-476,57815 May 2026 (the filing on sec.gov)
Point72 Asset Management LP353,541$174m0.22%Trimmed-83,31715 May 2026 (the filing on sec.gov)
Holocene Advisors LP341,267$168m0.40%Added+124,76615 May 2026 (the filing on sec.gov)
Woodline Partners LP337,819$166m0.63%Added+131,47015 May 2026 (the filing on sec.gov)
Artisan Partners LP312,822$154m0.25%Added+11,89113 May 2026 (the filing on sec.gov)
D. E. Shaw & Co.302,848$149m0.09%Added+255,30515 May 2026 (the filing on sec.gov)
Glenview Capital Management LLC250,525$123m3.09%Added+26,57815 May 2026 (the filing on sec.gov)
Two Sigma Investments LP187,893$92m0.07%Added+178,59315 May 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2025 to Q1 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Exited (5)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
30 in Q3 2024 to 36 in Q2 2026

Tracked managers listing it, at least.

02040602014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
TMO by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201319$8.8bnn.a.n.a.
Q3 201319$10.1bnn.a.n.a.
Q4 201319$12.6bnn.a.n.a.
Q1 201422$12.8bnn.a.n.a.
Q2 201422$12.9bnn.a.n.a.
Q3 201422$13.6bnn.a.n.a.
Q4 201430$14.7bnn.a.n.a.
Q1 201527$15.0bnn.a.n.a.
Q2 201527$14.1bnn.a.n.a.
Q3 201520$13.5bnn.a.n.a.
Q4 201521$15.4bnn.a.n.a.
Q1 201621$14.7bnn.a.n.a.
Q2 201620$14.9bnn.a.n.a.
Q3 201618$15.7bnn.a.n.a.
Q4 201631$13.2bnn.a.n.a.
Q1 201727$13.8bnn.a.n.a.
Q2 201729$15.7bnn.a.n.a.
Q3 201728$17.9bnn.a.n.a.
Q4 201720$18.2bnn.a.n.a.
Q1 201828$20.1bnn.a.n.a.
Q2 201827$19.9bnn.a.n.a.
Q3 201827$23.6bnn.a.n.a.
Q4 201830$21.6bnn.a.n.a.
Q1 201930$27.4bnn.a.n.a.
Q2 201933$28.8bnn.a.n.a.
Q3 201926$27.9bnn.a.n.a.
Q4 201926$30.3bnn.a.n.a.
Q1 202027$25.8bnn.a.n.a.
Q2 202029$32.6bnn.a.n.a.
Q3 202029$38.9bnn.a.n.a.
Q4 202033$39.2bnn.a.n.a.
Q1 202135$36.5bnn.a.n.a.
Q2 202133$38.3bnn.a.n.a.
Q3 202132$42.6bnn.a.n.a.
Q4 202138$50.1bnn.a.n.a.
Q1 202232$43.2bnn.a.n.a.
Q2 202233$38.9bnn.a.n.a.
Q3 202226$34.3bnn.a.n.a.
Q4 202229$37.0bnn.a.n.a.
Q1 202335$37.1bnn.a.n.a.
Q2 202339$33.5bnn.a.n.a.
Q3 202339$32.6bnn.a.n.a.
Q4 202341$32.7bn1923
Q1 202430$34.1bn1418
Q2 202438$30.6bn2518
Q3 202430$33.8bn1219
Q4 202436$27.6bn2215
Q1 202531$24.2bn1222
Q2 202539$18.8bn2711
Q3 202532$21.9bn2213
Q4 202532$29.9bn2720
Q1 202634$24.4bn2323
Q2 202636$26.4bn2722

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

TMO and LLY →TMO and JNJ →TMO and VRTX →Choose a stock to compare with TMO →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own TMO, latest filings →Back to the 13F Explorer →