How many shares of MRK does Calamos Advisors LLC own?

As of 2026-Q2, Calamos Advisors LLC holds 650,503 shares of MRK (MERCK & CO. INC.).

What is Calamos Advisors LLC's MRK position worth?

As of 2026-Q2, Calamos Advisors LLC's MRK position is worth $83.6M.

In 2026-Q2, Calamos Advisors LLC decreased their MRK position (-16.4% change in shares).

Based on available 13F filings, Calamos Advisors LLC first reported a position in MRK in 2019-Q1. They have held the position across 30 quarters.

Position history for Calamos Advisors LLC's holdings in MERCK & CO. INC.

Current Value

$83.6M

Current Shares

650,503

Total Value Change

-$971,364

Total Shares Change

-366,216

Quarter-by-Quarter History

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	650,503	-16.4%	$83.6M	0.3%	$128.50	0
2026-Q1	Increased	777,663	+8.0%	$93.5M	0.3%	$119.83	39
2025-Q4	Increased	719,806	+41.1%	$75.8M	0.3%	$106.06	47
2025-Q3	Decreased	510,200	0.0%	$42.8M	0.2%	$77.91	0
2025-Q2	Decreased	510,213	-23.6%	$40.4M	0.2%	$77.66	0
2025-Q1	Decreased	668,215	-21.6%	$60M	0.3%	$86.74	0
2024-Q4	Decreased	852,847	-10.6%	$84.8M	0.4%	$94.81	0
2024-Q3	Increased	953,704	+2.1%	$108.3M	0.5%	$108.70	37
2024-Q2	Decreased	934,413	-6.3%	$115.7M	0.5%	$117.58	0
2024-Q1	Increased	997,449	+6.0%	$131.6M	0.6%	$124.58	45
2023-Q4	Decreased	941,273	-3.0%	$102.6M	0.5%	$102.28	0
2023-Q3	Increased	970,607	+24.1%	$99.9M	0.5%	$95.89	51
2023-Q2	Increased	782,141	+9.7%	$90.3M	0.4%	$105.04	39
2023-Q1	Decreased	713,245	-7.8%	$75.9M	0.4%	$97.34	0
2022-Q4	Decreased	773,867	-4.7%	$85.9M	0.4%	$101.26	0
2022-Q3	Increased	811,588	+25.0%	$69.9M	0.3%	$78.55	43
2022-Q2	Increased	649,200	+2.8%	$59.2M	0.3%	$83.20	36
2022-Q1	Decreased	631,280	-21.0%	$51.8M	0.2%	$73.51	0
2021-Q4	Decreased	799,178	-1.3%	$61.2M	0.2%	$68.21	0
2021-Q3	Increased	809,768	+6.6%	$60.8M	0.3%	$65.77	38
2021-Q2	Increased	759,439	+17.9%	$59.1M	0.3%	$67.03	41
2021-Q1	Increased	644,182	+1.9%	$49.7M	0.3%	$63.21	36
2020-Q4	Decreased	632,134	-2.6%	$51.7M	0.3%	$65.61	0
2020-Q3	Decreased	649,148	-5.3%	$53.8M	0.3%	$66.16	0
2020-Q2	Decreased	685,429	-12.2%	$53M	0.4%	$61.04	0
2020-Q1	Decreased	780,747	-32.9%	$60.1M	0.5%	$61.22	0
2019-Q4	Decreased	1.2M	-0.7%	$105.9M	0.5%	$71.83	0
2019-Q3	Increased	1.2M	+3.8%	$98.7M	0.5%	$64.98	44
2019-Q2	Increased	1.1M	+11.1%	$94.7M	0.5%	$65.28	47
2019-Q1	New	1M	-	$84.6M	0.5%	$64.32	58