Rafferty Asset Management, LLC

Position in TMO — Thermo Fisher Scientific Inc.

CIK 1389426 New York, NY

Position in TMO

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$14,268,132

-$9,170,620 QoQ

Shares Held

29,028

-28.2% QoQ

Ownership

0.008%

of shares outstanding

% of Portfolio

0.07%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

Rafferty Asset Management, LLC holds $69,634,221 across 18 Diagnostics & Research names. TMO ranks #2 (20.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	IDXX	Idexx Laboratories Inc /De	25,899	$14,552,389
2	TMO	Thermo Fisher Scientific Inc. This page	29,028	$14,268,132
3	DHR	Danaher Corp /De/	48,612	$9,216,835
4	NTRA	Natera, Inc.	22,942	$4,588,170
5	TWST	Twist Bioscience Corp	96,255	$4,574,037
6	VCYT	Veracyte, Inc.	104,212	$3,356,668
7	GRAL	GRAIL, Inc.	55,423	$2,864,260
8	A	Agilent Technologies, Inc.	21,858	$2,491,374

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$14,268,132	29,028	-28.2%	Shares	Sole	2026-05-15
2025-12-31	$23,438,752	40,450	-3.5%	Shares	Sole	2026-02-13
2025-09-30	$20,334,948	41,926	+5.1%	Shares	Sole	2025-11-12
2025-06-30	$16,176,232	39,896	+12.6%	Shares	Sole	2025-08-14
2025-03-31	$17,623,001	35,416	-18.4%	Shares	Sole	2025-05-14
2024-12-31	$22,568,097	43,381	+12.0%	Shares	Sole	2025-02-14
2024-09-30	$23,966,494	38,745	-6.7%	Shares	Sole	2024-11-13
2024-06-30	$22,957,242	41,514	+4.1%	Shares	Sole	2024-08-13
2024-03-31	$23,175,748	39,875	+1.4%	Shares	Sole	2024-05-13
2023-12-31	$20,878,624	39,335	-2.3%	Shares	Sole	2024-02-13
2023-09-30	$20,382,959	40,269	+7.9%	Shares	Sole	2023-11-13
2023-06-30	$19,474,318	37,325	+6.4%	Shares	Sole	2023-08-11
2023-03-31	$20,227,705	35,095	+3.7%	Shares	Sole	2023-05-11
2022-12-31	$18,629,842	33,830	+60.8%	Shares	Sole	2023-02-13
2022-09-30	$10,672,291	21,042	+119.8%	Shares	Sole	2022-11-14
2022-06-30	$5,201,362	9,574	-21.1%	Shares	Sole	2022-08-12
2022-03-31	$7,163,993	12,129	-9.1%	Shares	Sole	2022-05-13
2021-12-31	$8,900,981	13,340	+6.4%	Shares	Sole	2022-02-10
2021-09-30	$7,166,192	12,543	+52.9%	Shares	Sole	2021-11-10
2021-06-30	$4,139,680	8,206	+8.8%	Shares	Sole	2021-08-10
2021-03-31	$3,441,105	7,540	+13.5%	Shares	Sole	2021-05-10
2020-12-31	$3,093,244	6,641	-7.3%	Shares	Sole	2021-02-10
2020-09-30	$3,163,490	7,165	-19.6%	Shares	Sole	2020-11-13
2020-06-30	$3,227,724	8,908	+188.8%	Shares	Sole	2020-08-07
2020-03-31	$874,906	3,085	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.