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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 2025
the date the book describes
Filed
5 Nov 2026
latest of these filings; the earliest 2 May 2025
Managers listing it
31
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q4 2024 and Q1 2025; 28 listed it in both
Shares listed
48,623,352
combined, among listed positions
Reported value
$24.2bn
combined, at the quarter end

Among the 95 comparable managers: 12 buyers (opened or added shares) and 22 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 Q1 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q4 2024, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

31 of 31 holders

ActionFiling
Capital World Investors11,061,400$5.5bn0.89%Added+1,631,28012 May 2025 (the filing on sec.gov)
T. Rowe Price Associates Inc9,304,832$4.6bn0.57%Trimmed-1,611,79214 May 2025 (the filing on sec.gov)
Capital Research Global Investors7,612,797$3.8bn0.82%Trimmed-307,92912 May 2025 (the filing on sec.gov)
Fidelity (FMR LLC)4,642,545$2.3bn0.15%Trimmed-1,694,8325 Nov 2026 (the filing on sec.gov)
MFS Investment Management2,396,032$1.2bn0.40%Trimmed-179,5992 May 2025 (the filing on sec.gov)
Polen Capital Management LLC2,322,482$1.2bn3.63%Trimmed-138,71312 May 2025 (the filing on sec.gov)
AllianceBernstein LP1,766,067$879m0.32%Added+272,74715 May 2025 (the filing on sec.gov)
Invesco Ltd1,688,214$840m0.16%Added+10,63312 May 2025 (the filing on sec.gov)
Wellington Management Group LLP1,595,715$794m0.15%Added+167,76313 May 2025 (the filing on sec.gov)
Janus Henderson Group Ltd1,100,274$550m0.30%Added+53,40315 May 2025 (the filing on sec.gov)
Farallon Capital Management LLC1,035,856$515m2.47%Trimmed-197,40015 May 2025 (the filing on sec.gov)
Neuberger Berman Group LLC884,159$440m0.37%Trimmed-280,61327 Oct 2026 (the filing on sec.gov)
Arrowstreet Capital LP655,936$326m0.26%Added+286,65114 May 2025 (the filing on sec.gov)
Two Sigma Advisers LP529,200$263m0.59%Trimmed-404,00015 May 2025 (the filing on sec.gov)
Baillie Gifford & Co509,377$253m0.22%Trimmed-29,4807 May 2025 (the filing on sec.gov)
Two Sigma Investments LP331,261$165m0.35%Trimmed-120,57015 May 2025 (the filing on sec.gov)
D. E. Shaw & Co.235,371$117m0.10%Trimmed-307,95515 May 2025 (the filing on sec.gov)
AQR Capital Management LLC209,265$102m0.11%Trimmed-11,93715 May 2025 (the filing on sec.gov)
Millennium Management LLC188,475$94munder 0.1%Trimmed-153,90615 May 2025 (the filing on sec.gov)
Renaissance Technologies LLC155,244$77m0.12%Trimmed-26,10014 May 2025 (the filing on sec.gov)
Squarepoint Ops LLC150,478$75m0.09%Addedn.a.27 Aug 2025 (the filing on sec.gov)
Markel Group Inc45,000$22m0.20%Added+3,9002 May 2025 (the filing on sec.gov)
Point72 Asset Management LP38,800$19munder 0.1%Trimmed-29721 Jul 2025 (the filing on sec.gov)
Verition Fund Management LLC33,639$17m0.08%Added+7,10315 May 2025 (the filing on sec.gov)
Quantbot Technologies LP27,188$14m0.43%Added+8,09613 May 2025 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q4 2024 to Q1 2025, 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 (1)

Exited (3)

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 →