Who holds ticker verified against the SEC company list on 2026-09-10 — a reviewed name-and-class mapping row, never an inferred symbol. how tickers are mapped ↗

THERMO FISHER SCIENTIFIC INC · common stock (filed as COM) · Q1 2026 · 44 members disclosed TMO ↗
13F filers reporting this class for the quarter ended 2026-03-31; 1–500 of 2,117 holders are listed, largest first
2,117
sum of the reported values across every holder; undisclosed values are left out, never counted as zero
$149B
holders whose share count rose or who opened the position (new + add), by shares
929
holders absent this quarter after holding last quarter — inferred from absence, not a sale record
224
FILING WINDOW OPEN
Q3 2026 filings are due by 2026-11-16 — figures for that quarter will change; missing filers are not zeros.

Holders — quarter ended 2026-03-31

by reported value · Δ shares vs 2025-12-31Holders rank by reported value. The change kind — new, add, trim or exit — is read from the share count against the prior quarter, never from the reported value.
13F holders of TMO ranked by reported value, 1–25 of 2,117 holders
#FilerReported valueSharesΔ sharesChange
1BlackRock, Inc.$15.0B30,427,192−250,693TRIM
2VANGUARD CAPITAL MANAGEMENT LLC$11.9B24,280,816—NO PRIOR
3STATE STREET CORP$8.2B16,731,668+117,907ADD
4MORGAN STANLEY$5.3B10,863,528−1,030,749TRIM
5FMR LLC$5.3B10,776,436+983,089ADD
6GEODE CAPITAL MANAGEMENT, LLC$4.1B8,407,891+211,414ADD
7FRANKLIN RESOURCES INC$3.3B6,813,031+466,519ADD
8Capital World Investors$3.3B6,646,316−4,357,498TRIM
9JPMORGAN CHASE & CO$3.3B6,795,482+6,795,482NEW
10VANGUARD PORTFOLIO MANAGEMENT LLC$3.0B6,163,370—NO PRIOR
11BANK OF AMERICA CORP /DE/$2.7B5,533,403−412,435TRIM
12MASSACHUSETTS FINANCIAL SERVICES CO /MA/$2.3B3,013,109−74,557TRIM
13Capital Research Global Investors$2.2B4,414,621+1,499,720ADD
14ROYAL BANK OF CANADA$1.9B3,913,903+3,913,903NEW
15Capital International Investors$1.9B3,888,726+2,968,583ADD
16Bank of New York Mellon Corp$1.9B3,766,614+42,138ADD
17NORTHERN TRUST CORP$1.7B3,415,610−33,713TRIM
18CHARLES SCHWAB INVESTMENT MANAGEMENT INC$1.4B2,934,842+91,188ADD
19DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main$1.4B2,914,918−616,675TRIM
20Fisher Asset Management, LLC$1.4B2,851,579+59,158ADD
21ALLIANCEBERNSTEIN L.P.$1.3B2,190,608−258,915TRIM
22Grantham, Mayo, Van Otterloo & Co. LLC$1.2B2,502,206+90,143ADD
23UBS Group AG$1.2B2,453,453+130,110ADD
24UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$1.2B2,449,697+20,966ADD
25Legal & General Group Plc$1.2B2,370,531−48,051TRIM
Show the top 500 of 2,117 holders
Truncated by Public Filings. Top 500 of 2,117 holders shown; the rest are on EDGAR. Method ↗
Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt.

Congress ↔ notable managers · TMO

Congress · last 90 days

Buyers
0 — —
Sellers
1 Michael A. Rulli R–OH-6 $1K–$15K

filed 2026-07-31 → 2026-10-29 · statutory ranges

Use of congressional disclosure reports for commercial purposes, credit decisions or solicitation is restricted by 5 U.S.C. §13107(c).

Notable managers · quarter ended 2026-03-31

Trimming
1 Third Point $0 held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · THERMO FISHER SCIENTIFIC INC

Merged timeline of congressional filings and notable-manager moves on TMO
DateWhoChangeSize
2026-08-07Michael A. Rulli CongressSELL$1K–$15K
2026-05-15Viking Global Investors 13FADD+874,838 sh
2026-05-15D1 Capital Partners 13FNEW+725,005 sh
2026-05-15Glenview Capital 13FADD+26,578 sh
2026-05-15Gotham Asset Management 13FADD+29,307 sh
2026-05-15Bridgewater Associates 13FADD+12,801 sh
2026-05-15Third Point 13FEXIT−50,000 sh
2026-05-01Markel Group 13FADD+4,300 sh

8 newest, by filing date · 13F rows are quarter-end snapshots, not trades

A 13F is a quarterly, long-only snapshot filed up to 45 days late — not current holdings. what a 13F covers ↗

13F reports cover LONG positions in Section 13(f) securities (US exchange-traded equities plus reportable options, warrants, certain convertibles) held by managers with at least $100M in such securities — so managers below that threshold are absent entirely. No short positions, no cash, no non-13(f) assets — not a full portfolio, and not a census of institutional ownership.

Positions are quarter-end snapshots filed up to 45 days late — not current holdings: a position may have changed or closed since the quarter ended.

Values are the manager's stated market value at quarter-end in era-dependent units (whole dollars for form versions effective 2023-01-03 onward, thousands before), normalized here to whole dollars; each record notes its original unit.

Affiliated managers may report the same position, so one position can appear under more than one filer.

Positions under confidential treatment may be omitted until a later amendment discloses them.

These are disclosures, not investment advice.