LOOMIS SAYLES & CO L P

Position in MRK — Merck & Co., Inc.

CIK 312348 BOSTON, MA

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Position in MRK

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$8,982,174

-$7,365,756 QoQ

Shares Held

74,671

-51.9% QoQ

Ownership

0.003%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 93.35886756572164.ToString("F0")% Shared 0.ToString("F0")% None 6.641132434278369.ToString("F0")%

Common Shares in MRK Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - General

Healthcare · as of Mar 31, 2026

LOOMIS SAYLES & CO L P holds $1,490,658,820 across 10 Drug Manufacturers - General names. MRK ranks #4 (0.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NVS	Novartis AG	5,426,100	$828,836,774
2	NVO	Novo Nordisk A S	17,017,315	$625,386,326
3	BMY	Bristol Myers Squibb Co	158,632	$9,621,030
4	MRK	Merck & Co., Inc. This page	74,671	$8,982,174
5	GILD	Gilead Sciences, Inc.	46,065	$6,420,078
6	ABBV	AbbVie Inc.	26,603	$5,785,886
7	LLY	ELI LILLY & Co	4,800	$4,414,896
8	JNJ	Johnson & Johnson	2,983	$729,164

All Filings in MRK

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$8,982,174	74,671	-51.9%	Shares	Defined	2026-05-14
2025-12-31	$16,347,930	155,310	-25.9%	Shares	Defined	2026-02-12
2025-09-30	$17,584,257	209,511	-9.5%	Shares	Defined	2025-11-13
2025-06-30	$18,332,822	231,592	+27.0%	Shares	Defined	2025-08-13
2025-03-31	$16,370,607	182,382	-2.6%	Shares	Defined	2025-05-14
2024-12-31	$18,624,545	187,219	+42.5%	Shares	Defined	2025-02-12
2024-09-30	$14,924,509	131,424	+75.4%	Shares	Defined	2024-11-13
2024-06-30	$9,276,209	74,929	+101.6%	Shares	Defined	2024-08-13
2024-03-31	$4,904,052	37,166	-11.5%	Shares	Defined	2024-05-14
2023-12-31	$4,575,786	41,972	+373.6%	Shares	Defined	2024-02-13
2023-09-30	$912,342	8,862	-22.6%	Shares	Defined	2023-11-09
2023-06-30	$1,321,099	11,449	-75.4%	Shares	Defined	2023-08-11
2023-03-31	$4,941,708	46,449	-6.8%	Shares	Defined	2023-05-15
2022-12-31	$5,530,080	49,843	+2.4%	Shares	Defined	2023-02-10
2022-09-30	$4,193,698	48,696	-87.0%	Shares	Defined	2022-11-14
2022-06-30	$34,069,408	373,691	-37.6%	Shares	Defined	2022-08-05
2022-03-31	$49,175,271	599,333	+45.2%	Shares	Defined	2022-05-13
2021-12-31	$31,641,359	412,857	-29.8%	Shares	Defined	2022-02-14
2021-09-30	$44,143,498	587,718	+10.8%	Shares	Defined	2021-11-12
2021-06-30	$41,267,483	530,635	-11.5%	Shares	Defined	2021-08-13
2021-03-31	$44,101,093	599,532	+327.3%	Shares	Defined	2021-05-17
2020-12-31	$10,951,281	140,305	+947.5%	Shares	Defined	2021-02-12
2020-09-30	$1,060,145	13,394	-7.1%	Shares	Defined	2020-11-12
2020-06-30	$1,064,025	14,420	-99.7%	Shares	Defined	2020-08-14
2020-03-31	$410,135,767	5,586,463	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.