There is a long list of 2465 institutional holders of TMO within the last two holding periods in our database of 13F filers, so we've sorted through to present to you just the top 50 institutional holders of TMO by largest to smallest position reported in the institutional investor's latest 13F filing. In the institutional-holders-of-TMO table below, the initial column indicates the name of each top institutional holder of TMO, with a link to that fund's top holdings. The next columns indicate the amount of TMO stock held by each of the institutional holders of TMO, followed by the TMO position size held by the institution, and finally the date of the quarterly 13F filing period the holdings data represents for that institution.

Holder	Amount	Position Size ($ in 1000's)	As of
Vanguard Group Inc.	32,978,438	$17,504,625	12/31/2023
TMO	32,978,438	$17,504,625	12/31/2023
BlackRock Inc.	28,329,806	$15,037,178	12/31/2023
TMO	28,329,806	$15,037,178	12/31/2023
Punch & Associates Investment Management Inc.		$10,143,522	12/31/2023
Call	19,091	$10,133,389	12/31/2023
TMO	19,091	$10,133	12/31/2023
State Street Corp	16,476,884	$8,751,373	12/31/2023
TMO	16,476,884	$8,751,373	12/31/2023
Morgan Stanley	12,552,744	$6,662,872	12/31/2023
TMO	12,552,744	$6,662,872	12/31/2023
Capital World Investors	12,262,793	$6,508,990	12/31/2023
TMO	12,262,793	$6,508,990	12/31/2023
Price T Rowe Associates Inc. MD	9,897,946	$5,253,732	12/31/2023
TMO	9,897,946	$5,253,732	12/31/2023
Capital Research Global Investors	7,989,614	$4,240,824	12/31/2023
TMO	7,989,614	$4,240,824	12/31/2023
FMR LLC	7,849,545	$4,166,460	12/31/2023
TMO	7,849,545	$4,166,460	12/31/2023
Geode Capital Management LLC	7,291,893	$3,858,668	12/31/2023
TMO	7,291,893	$3,858,668	12/31/2023
Norges Bank	5,481,498	$2,909,524	12/31/2023
TMO	5,481,498	$2,909,524	12/31/2023
Bank of America Corp DE		$2,756,113	12/31/2023
TMO	4,900,774	$2,601,282	12/31/2023
Call	302,900	$160,776	12/31/2023
Put	11,200	$5,945	12/31/2023
Massachusetts Financial Services Co. MA	4,180,285	$2,218,853	12/31/2023
TMO	4,180,285	$2,218,853	12/31/2023
JPMorgan Chase & Co.		$2,024,249	12/31/2023
TMO	3,775,053	$2,003,761	12/31/2023
Call	63,600	$33,758	12/31/2023
Put	25,000	$13,270	12/31/2023
Northern Trust Corp	3,787,113	$2,010,162	12/31/2023
TMO	3,787,113	$2,010,162	12/31/2023
Royal Bank of Canada		$1,705,042	12/31/2023
TMO	3,244,373	$1,722,080	12/31/2023
Put	32,100	$17,038	12/31/2023
TCI Fund Management Ltd.	3,146,382	$1,670,068	12/31/2023
TMO	3,146,382	$1,670,068	12/31/2023
Legal & General Group Plc	3,124,162	$1,658,281	12/31/2023
TMO	3,124,162	$1,658,281	12/31/2023
Primecap Management Co. CA	3,002,872	$1,593,894	12/31/2023
TMO	3,002,872	$1,593,894	12/31/2023
Wellington Management Group LLP	2,988,140	$1,586,075	12/31/2023
TMO	2,988,140	$1,586,075	12/31/2023
Bank of New York Mellon Corp	2,959,400	$1,570,820	12/31/2023
TMO	2,959,400	$1,570,820	12/31/2023
Pictet Asset Management Holding SA	2,624,736	$1,393,184	12/31/2023
TMO	2,624,736	$1,393,184	12/31/2023
Fisher Asset Management LLC	2,571,666	$1,365,015	12/31/2023
TMO	2,571,666	$1,365,015	12/31/2023
Amundi	2,492,195	$1,349,204	12/31/2023
TMO	2,492,195	$1,349,204	12/31/2023
Franklin Resources Inc.	2,518,760	$1,336,933	12/31/2023
TMO	2,518,760	$1,336,933	12/31/2023
The Manufacturers Life Insurance Company	2,349,580	$1,247,134	12/31/2023
TMO	2,349,580	$1,247,134	12/31/2023
Charles Schwab Investment Management Inc.	2,277,266	$1,208,750	12/31/2023
TMO	2,277,266	$1,208,750	12/31/2023
Clearbridge Investments LLC	2,228,730	$1,182,987	12/31/2023
TMO	2,228,730	$1,182,987	12/31/2023
UBS Group AG		$1,101,007	12/31/2023
TMO	2,098,314	$1,113,764	12/31/2023
Put	148,602	$78,876	12/31/2023
Call	124,568	$66,119	12/31/2023
Polen Capital Management LLC	2,032,950	$1,079,160	12/31/2023
TMO	2,032,950	$1,079,160	12/31/2023
Goldman Sachs Group Inc.		$1,031,206	12/31/2023
TMO	1,944,274	$1,032,002	12/31/2023
Put	33,300	$17,675	12/31/2023
Call	31,800	$16,879	12/31/2023
Brown Advisory Inc.	1,894,295	$1,005,473	12/31/2023
TMO	1,894,295	$1,005,473	12/31/2023
Lazard Asset Management LLC	1,877,702	$996,663	12/31/2023
TMO	1,877,702	$996,663	12/31/2023
Alliancebernstein L.P.	1,833,784	$973,354	12/31/2023
TMO	1,833,784	$973,354	12/31/2023
Generation Investment Management LLP	1,781,235	$945,462	12/31/2023
TMO	1,781,235	$945,462	12/31/2023
Mitsubishi UFJ Kokusai Asset Management Co. Ltd.	1,784,152	$943,495	12/31/2023
TMO	1,784,152	$943,495	12/31/2023
Putnam Investments LLC	1,719,355	$912,617	12/31/2023
TMO	1,719,355	$912,617	12/31/2023
Dimensional Fund Advisors LP	1,710,166	$907,756	12/31/2023
TMO	1,710,166	$907,756	12/31/2023
Voya Investment Management LLC	1,693,609	$898,489	12/31/2023
TMO	1,693,609	$898,489	12/31/2023
Veritas Asset Management LLP	1,692,148	$898,175	12/31/2023
TMO	1,692,148	$898,175	12/31/2023
Invesco Ltd.	1,673,943	$888,512	12/31/2023
TMO	1,673,943	$888,512	12/31/2023
DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main	1,642,377	$871,736	12/31/2023
TMO	1,642,377	$871,736	12/31/2023
UBS Asset Management Americas Inc.	1,611,469	$855,352	12/31/2023
TMO	1,611,469	$855,352	12/31/2023
Barclays PLC		$811,353	12/31/2023
TMO	1,533,274	$813,848	12/31/2023
Put	17,800	$9,448	12/31/2023
Call	13,100	$6,953	12/31/2023
Wells Fargo & Company MN		$803,279	12/31/2023
TMO	1,513,964	$803,597	12/31/2023
Put	1,300	$690	12/31/2023
Call	700	$372	12/31/2023
1832 Asset Management L.P.	1,494,702	$793,373	12/31/2023
TMO	1,494,702	$793,373	12/31/2023
Alecta Pensionsforsakring Omsesidigt	1,412,000	$750,111	12/31/2023
TMO	1,412,000	$750,111	12/31/2023
Parnassus Investments CA	1,386,284	$735,826	12/31/2023
TMO	1,386,284	$735,826	12/31/2023
Ameriprise Financial Inc.	1,383,060	$734,122	12/31/2023
TMO	1,383,060	$734,122	12/31/2023
Flossbach Von Storch AG	1,354,742	$719,084	12/31/2023
TMO	1,354,742	$719,084	12/31/2023