Calamos Wealth Management’s Costco COST Stock Holding History

Calamos Wealth Management’s Portfolio COST Stock Details COST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$9.66M	Buy	9,699 +1,135	+13%	+$1.11M	0.33%	67
2025 Q4	$7.39M	Buy	8,564 +338	+4%	+$306K	0.25%	72
2025 Q3	$7.61M	Buy	8,226 +1,666	+25%	+$1.6M	0.27%	71
2025 Q2	$6.49M	Sell	6,560 -3	-0%	-$2.98K	0.27%	68
2025 Q1	$6.21M	Sell	6,563 -826	-11%	-$805K	0.31%	66
2024 Q4	$6.77M	Buy	7,389 +120	+2%	+$111K	0.34%	63
2024 Q3	$6.44M	Buy	7,269 +877	+14%	+$761K	0.33%	66
2024 Q2	$5.43M	Sell	6,392 -144	-2%	-$112K	0.29%	71
2024 Q1	$4.79M	Sell	6,536 -505	-7%	-$361K	0.27%	75
2023 Q4	$4.65M	Sell	7,041 -180	-2%	-$107K	0.29%	72
2023 Q3	$4.08M	Buy	7,221 +208	+3%	+$115K	0.31%	71
2023 Q2	$3.78M	Buy	7,013 +102	+1%	+$51.6K	0.28%	75
2023 Q1	$3.43M	Buy	6,911 +417	+6%	+$205K	0.27%	77
2022 Q4	$2.96M	Buy	6,494 +62	+1%	+$30.3K	0.23%	87
2022 Q3	$3.04M	Sell	6,432 -461	-7%	-$240K	0.26%	77
2022 Q2	$3.3M	Sell	6,893 -299	-4%	-$152K	0.29%	79
2022 Q1	$4.14M	Buy	7,192 +253	+4%	+$133K	0.31%	79
2021 Q4	$3.94M	Buy	6,939 +1,088	+19%	+$557K	0.29%	80
2021 Q3	$2.63M	Sell	5,851 -506	-8%	-$222K	0.21%	92
2021 Q2	$2.52M	Buy	6,357 +159	+3%	+$60.1K	0.2%	98
2021 Q1	$2.19M	Buy	6,198 +143	+2%	+$49.8K	0.18%	99
2020 Q4	$2.28M	Buy	6,055 +75	+1%	+$28K	0.21%	81
2020 Q3	$2.12M	Buy	5,980 +1,077	+22%	+$362K	0.24%	75
2020 Q2	$1.49M	Sell	4,903 -386	-7%	-$117K	0.19%	83
2020 Q1	$1.51M	Sell	5,289 -537	-9%	-$163K	0.23%	70
2019 Q4	$1.71M	Buy	5,826 +112	+2%	+$33.3K	0.2%	82
2019 Q3	$1.65M	Buy	5,714 +3	+0.1%	+$844	0.22%	85
2019 Q2	$1.51M	Sell	5,711 -925	-14%	-$231K	0.2%	84
2019 Q1	$1.61M	Sell	6,636 -23,517	-78%	-$5.14M	0.23%	85
2018 Q4	$6.14M	Sell	30,153 -623	-2%	-$139K	0.92%	27
2018 Q3	$7.23M	Sell	30,776 -2,504	-8%	-$564K	0.9%	30
2018 Q2	$6.96M	Sell	33,280 -316	-0.9%	-$62.4K	0.87%	33
2018 Q1	$6.33M	Buy	33,596 +1,937	+6%	+$365K	0.79%	43
2017 Q4	$5.89M	Buy	31,659 +27,232	+615%	+$4.7M	0.76%	45
2017 Q3	$727K	Buy	4,427 +70	+2%	+$11K	0.1%	150
2017 Q2	$697K	Sell	4,357 -5,065	-54%	-$873K	0.1%	159
2017 Q1	$1.58M	Sell	9,422 -3,839	-29%	-$643K	0.24%	108
2016 Q4	$2.12M	Sell	13,261 -1,167	-8%	-$178K	0.34%	90
2016 Q3	$2.2M	Sell	14,428 -1,324	-8%	-$214K	0.38%	85
2016 Q2	$2.47M	Sell	15,752 -907	-5%	-$137K	0.44%	72
2016 Q1	$2.63M	Sell	16,659 -132	-0.8%	-$20K	0.51%	58
2015 Q4	$2.71M	Sell	16,791 -527	-3%	-$83.3K	0.54%	50
2015 Q3	$2.5M	Buy	17,318 +163	+1%	+$23.3K	0.6%	49
2015 Q2	$2.32M	Sell	17,155 -1,867	-10%	-$268K	0.55%	53
2015 Q1	$2.88M	Buy	19,022 +931	+5%	+$137K	0.72%	40
2014 Q4	$2.56M	Sell	18,091 -4,568	-20%	-$621K	0.74%	39
2014 Q3	$2.84M	Buy	22,659 +7,330	+48%	+$886K	0.82%	33
2014 Q2	$1.76M	Buy	15,329 +30	+0.2%	+$3.44K	0.5%	80
2014 Q1	$1.71M	Sell	15,299 -244	-2%	-$27.9K	0.51%	84
2013 Q4	$1.85M	Sell	15,543 -165	-1%	-$19.7K	0.57%	70
2013 Q3	$1.81M	Sell	15,708 -6,349	-29%	-$733K	0.59%	61
2013 Q2	$2.44M	Buy	+22,057	New	+$2.41M	0.86%	34

Other funds holding COST

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

DAM

Diamant Asset Management Ridgefield, Connecticut $137B AUM 18.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Calamos Wealth Management's COST Position: Q1 2026 in Review

Calamos Wealth Management increased its Costco (COST) stake by 13% in Q1 2026, buying an estimated $1.11M and bringing the position to 9,699 shares worth $9.66M. The position accounts for 0.33% of the portfolio, ranked #67.

Calamos Wealth Management first reported a position in COST in Q2 2013 and has held it in 52 quarters since. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

Calamos Wealth Management held 9,699 shares of Costco worth $9.66M as of Q1 2026.
Calamos Wealth Management bought 1,135 Costco shares in Q1 2026, an estimated $1.11M.
Costco made up 0.33% of Calamos Wealth Management's portfolio in Q1 2026, its #67 holding.
Calamos Wealth Management first reported a position in Costco in Q2 2013 and has held it in 52 quarters since.
4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Calamos Wealth Management's 13F filing for Q1 2026, filed 4 May 2026.