Calamos Advisors’s Costco COST Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $90.7M | Buy |
91,006
+2,913
| +3% | +$2.84M | 0.32% | 60 |
|
|
2025
Q4 | $76M | Sell |
88,093
-7,537
| -8% | -$6.83M | 0.29% | 76 |
|
|
2025
Q3 | $88.5M | Sell |
95,630
-9,704
| -9% | -$9.3M | 0.33% | 60 |
|
|
2025
Q2 | $104M | Buy |
105,334
+47
| +0% | +$46.7K | 0.41% | 45 |
|
|
2025
Q1 | $99.6M | Sell |
105,287
-2,301
| -2% | -$2.24M | 0.43% | 39 |
|
|
2024
Q4 | $98.6M | Sell |
107,588
-159
| -0.1% | -$148K | 0.41% | 43 |
|
|
2024
Q3 | $95.5M | Sell |
107,747
-1,001
| -0.9% | -$869K | 0.41% | 39 |
|
|
2024
Q2 | $92.4M | Sell |
108,748
-2,162
| -2% | -$1.69M | 0.41% | 40 |
|
|
2024
Q1 | $81.3M | Sell |
110,910
-1,359
| -1% | -$970K | 0.39% | 53 |
|
|
2023
Q4 | $74.1M | Sell |
112,269
-1,391
| -1% | -$824K | 0.36% | 59 |
|
|
2023
Q3 | $64.2M | Buy |
113,660
+3,876
| +4% | +$2.14M | 0.33% | 64 |
|
|
2023
Q2 | $59.1M | Buy |
109,784
+65
| +0.1% | +$32.9K | 0.29% | 81 |
|
|
2023
Q1 | $54.5M | Sell |
109,719
-8,094
| -7% | -$3.97M | 0.27% | 93 |
|
|
2022
Q4 | $53.8M | Sell |
117,813
-17,225
| -13% | -$8.42M | 0.25% | 100 |
|
|
2022
Q3 | $63.8M | Buy |
135,038
+42
| +0% | +$21.8K | 0.29% | 75 |
|
|
2022
Q2 | $64.7M | Sell |
134,996
-20,977
| -13% | -$10.6M | 0.28% | 75 |
|
|
2022
Q1 | $89.8M | Buy |
155,973
+7,809
| +5% | +$4.1M | 0.34% | 54 |
|
|
2021
Q4 | $84.1M | Buy |
148,164
+2,574
| +2% | +$1.32M | 0.31% | 71 |
|
|
2021
Q3 | $65.4M | Buy |
145,590
+23,031
| +19% | +$10.1M | 0.29% | 82 |
|
|
2021
Q2 | $48.5M | Buy |
122,559
+14,397
| +13% | +$5.44M | 0.22% | 116 |
|
|
2021
Q1 | $38.1M | Buy |
108,162
+2,281
| +2% | +$794K | 0.21% | 124 |
|
|
2020
Q4 | $39.9M | Sell |
105,881
-8,749
| -8% | -$3.27M | 0.23% | 116 |
|
|
2020
Q3 | $40.7M | Buy |
114,630
+18,538
| +19% | +$6.23M | 0.26% | 99 |
|
|
2020
Q2 | $29.1M | Sell |
96,092
-11,507
| -11% | -$3.5M | 0.21% | 135 |
|
|
2020
Q1 | $30.7M | Sell |
107,599
-73,204
| -40% | -$22.2M | 0.24% | 123 |
|
|
2019
Q4 | $53.1M | Sell |
180,803
-23,042
| -11% | -$6.85M | 0.26% | 103 |
|
|
2019
Q3 | $58.7M | Buy |
203,845
+44,436
| +28% | +$12.5M | 0.32% | 82 |
|
|
2019
Q2 | $42.1M | Sell |
159,409
-10,716
| -6% | -$2.67M | 0.23% | 126 |
|
|
2019
Q1 | $41.2M | Sell |
170,125
-210
| -0.1% | -$45.9K | 0.26% | 118 |
|
|
2018
Q4 | $34.7M | Sell |
170,335
-7,070
| -4% | -$1.58M | 0.23% | 121 |
|
|
2018
Q3 | $41.7M | Buy |
177,405
+3,630
| +2% | +$818K | 0.23% | 114 |
|
|
2018
Q2 | $36.3M | Buy |
173,775
+6,499
| +4% | +$1.28M | 0.22% | 124 |
|
|
2018
Q1 | $31.5M | Buy |
167,276
+2,373
| +1% | +$448K | 0.21% | 137 |
|
|
2017
Q4 | $30.7M | Sell |
164,903
-5,600
| -3% | -$967K | 0.16% | 141 |
|
|
2017
Q3 | $28M | Buy |
170,503
+1,256
| +0.7% | +$197K | 0.22% | 142 |
|
|
2017
Q2 | $27.1M | Sell |
169,247
-217,452
| -56% | -$37.5M | 0.2% | 147 |
|
|
2017
Q1 | $64.8M | Sell |
386,699
-3,168
| -0.8% | -$531K | 0.51% | 45 |
|
|
2016
Q4 | $62.4M | Sell |
389,867
-30,868
| -7% | -$4.71M | 0.5% | 48 |
|
|
2016
Q3 | $64.2M | Sell |
420,735
-40,354
| -9% | -$6.52M | 0.46% | 50 |
|
|
2016
Q2 | $72.4M | Sell |
461,089
-187
| -0% | -$28.3K | 0.51% | 52 |
|
|
2016
Q1 | $72.7M | Buy |
461,276
+2,564
| +0.6% | +$389K | 0.48% | 53 |
|
|
2015
Q4 | $74.1M | Sell |
458,712
-455
| -0.1% | -$71.9K | 0.47% | 54 |
|
|
2015
Q3 | $66.4M | Buy |
459,167
+196
| +0% | +$28K | 0.46% | 55 |
|
|
2015
Q2 | $62M | Sell |
458,971
-175,570
| -28% | -$25.2M | 0.38% | 77 |
|
|
2015
Q1 | $96.1M | Buy |
634,541
+12,194
| +2% | +$1.79M | 0.6% | 33 |
|
|
2014
Q4 | $88.2M | Sell |
622,347
-249,700
| -29% | -$33.9M | 0.58% | 43 |
|
|
2014
Q3 | $109M | Buy |
872,047
+381,421
| +78% | +$46.1M | 0.73% | 31 |
|
|
2014
Q2 | $56.5M | Buy |
490,626
+125
| +0% | +$14.3K | 0.36% | 81 |
|
|
2014
Q1 | $54.8M | Sell |
490,501
-13,610
| -3% | -$1.56M | 0.35% | 82 |
|
|
2013
Q4 | $60M | Sell |
504,111
-585
| -0.1% | -$69.9K | 0.38% | 65 |
|
|
2013
Q3 | $58.1M | Sell |
504,696
-363,614
| -42% | -$42M | 0.36% | 72 |
|
|
2013
Q2 | $96M | Buy |
+868,310
| New | +$94.9M | 0.63% | 40 |
|
Other funds holding COST
VCM
VPM
DAM
Calamos Advisors's COST Position: Q1 2026 in Review
Calamos Advisors increased its Costco (COST) stake by 3.3% in Q1 2026, buying an estimated $2.84M and bringing the position to 91,006 shares worth $90.7M. The position accounts for 0.32% of the portfolio, ranked #60.
Calamos Advisors first reported a position in COST in Q2 2013 and has held it in 52 quarters since. The position peaked at $109M in Q3 2014. 4,238 funds tracked by Wall St. Rank hold COST as of Q1 2026.
- Calamos Advisors held 91,006 shares of Costco worth $90.7M as of Q1 2026.
- Calamos Advisors bought 2,913 Costco shares in Q1 2026, an estimated $2.84M.
- Costco made up 0.32% of Calamos Advisors's portfolio in Q1 2026, its #60 holding.
- Calamos Advisors first reported a position in Costco in Q2 2013 and has held it in 52 quarters since.
- Calamos Advisors's Costco position peaked at $109M in Q3 2014.
- 4,238 funds tracked by Wall St. Rank held Costco as of Q1 2026.
Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.