L3VLUP
ProSign in

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 Dec 2023
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 26 Jan 2024
Managers listing it
41
at least, of 95 tracked, among listed positions
Comparable managers
93
filed both Q3 2023 and Q4 2023; 34 listed it in both
Shares listed
61,664,546
combined, among listed positions
Reported value
$32.7bn
combined, at the quarter end

Among the 93 comparable managers: 19 buyers (opened or added shares) and 23 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing TMO in Q4 2023

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2023, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

41 of 41 holders

ActionFiling
Capital World Investors12,262,793$6.5bn1.16%Trimmed-492,21413 Feb 2024 (the filing on sec.gov)
T. Rowe Price Associates Inc9,897,946$5.3bn0.71%Trimmed-240,15916 Feb 2024 (the filing on sec.gov)
Capital Research Global Investors7,989,614$4.2bn1.04%Added+517,13713 Feb 2024 (the filing on sec.gov)
Fidelity (FMR LLC)7,849,545$4.2bn0.32%Trimmed-470,4795 Nov 2026 (the filing on sec.gov)
MFS Investment Management4,180,285$2.2bn0.72%Trimmed-2,226,7768 Feb 2024 (the filing on sec.gov)
TCI Fund Management Ltd3,146,382$1.7bn4.64%Trimmed-46,80014 Feb 2024 (the filing on sec.gov)
Wellington Management Group LLP2,988,140$1.6bn0.30%Trimmed-92,54712 Feb 2024 (the filing on sec.gov)
Polen Capital Management LLC2,033,120$1.1bn2.60%Trimmed-117,90810 May 2024 (the filing on sec.gov)
AllianceBernstein LP1,833,784$973m0.37%Added+217,03414 Feb 2024 (the filing on sec.gov)
Invesco Ltd1,673,943$889m0.21%Trimmed-23,84513 Feb 2024 (the filing on sec.gov)
Janus Henderson Group Ltd1,347,636$715m0.43%Trimmed-165,20414 Feb 2024 (the filing on sec.gov)
Farallon Capital Management LLC1,203,131$639m2.92%Added+155,60014 Feb 2024 (the filing on sec.gov)
Neuberger Berman Group LLC1,172,902$623m0.54%Trimmed-33,97314 Nov 2024 (the filing on sec.gov)
Baillie Gifford & Co671,165$356m0.28%Trimmed-25,76926 Jan 2024 (the filing on sec.gov)
Viking Global Investors LP538,485$286m1.05%Trimmed-361,23014 Feb 2024 (the filing on sec.gov)
Citadel Advisors LLC528,875$281m0.06%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Point72 Asset Management LP423,803$225m0.54%Addedn.a.14 Feb 2024 (the filing on sec.gov)
Marshall Wace LLP422,576$224m0.38%Newnew14 Feb 2024 (the filing on sec.gov)
Holocene Advisors LP291,952$155m0.60%Newnew14 Feb 2024 (the filing on sec.gov)
Balyasny Asset Management LLC252,983$134m0.25%Added+114,43414 Feb 2024 (the filing on sec.gov)
Steadfast Capital Management LP133,400$71m1.75%Newnew14 Feb 2024 (the filing on sec.gov)
Two Sigma Investments LP110,375$59m0.13%Trimmed-107,17914 Feb 2024 (the filing on sec.gov)
AQR Capital Management LLC108,895$58m0.11%Trimmed-48,84414 Feb 2024 (the filing on sec.gov)
D. E. Shaw & Co.102,497$54munder 0.1%Trimmed-114,84614 Feb 2024 (the filing on sec.gov)
Squarepoint Ops LLC89,941$48m0.09%Added+35,73914 Feb 2024 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2023 to Q4 2023, 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 (4)

Exited (2)

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 →