Mariner’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 | $436M | Buy |
437,088
+40,755
| +10% | +$39.7M | 0.51% | 36 |
|
|
2025
Q4 | $342M | Sell |
396,333
-3,561
| -0.9% | -$3.23M | 0.41% | 40 |
|
|
2025
Q3 | $370M | Buy |
399,894
+5,937
| +2% | +$5.69M | 0.48% | 35 |
|
|
2025
Q2 | $390M | Buy |
393,957
+36,845
| +10% | +$36.6M | 0.56% | 33 |
|
|
2025
Q1 | $338M | Buy |
357,112
+961
| +0.3% | +$937K | 0.56% | 33 |
|
|
2024
Q4 | $326M | Buy |
356,151
+9,032
| +3% | +$8.38M | 0.55% | 34 |
|
|
2024
Q3 | $308M | Sell |
347,119
-18,424
| -5% | -$16M | 0.55% | 32 |
|
|
2024
Q2 | $311M | Buy |
365,543
+7,859
| +2% | +$6.13M | 0.6% | 28 |
|
|
2024
Q1 | $262M | Buy |
357,684
+3,654
| +1% | +$2.61M | 0.54% | 33 |
|
|
2023
Q4 | $234M | Buy |
354,030
+807
| +0.2% | +$478K | 0.55% | 31 |
|
|
2023
Q3 | $200M | Buy |
353,223
+15,953
| +5% | +$8.81M | 0.54% | 34 |
|
|
2023
Q2 | $182M | Buy |
337,270
+11,033
| +3% | +$5.58M | 0.49% | 40 |
|
|
2023
Q1 | $162M | Buy |
326,237
+10,995
| +3% | +$5.39M | 0.47% | 44 |
|
|
2022
Q4 | $144M | Buy |
315,242
+3,758
| +1% | +$1.84M | 0.46% | 50 |
|
|
2022
Q3 | $147M | Buy |
311,484
+17,975
| +6% | +$9.35M | 0.59% | 28 |
|
|
2022
Q2 | $141M | Buy |
293,509
+41,692
| +17% | +$21.2M | 0.58% | 30 |
|
|
2022
Q1 | $145M | Buy |
251,817
+25,948
| +11% | +$13.6M | 0.55% | 34 |
|
|
2021
Q4 | $128M | Buy |
225,869
+21,372
| +10% | +$10.9M | 0.54% | 33 |
|
|
2021
Q3 | $91.9M | Buy |
204,497
+13,769
| +7% | +$6.05M | 0.48% | 42 |
|
|
2021
Q2 | $75.5M | Buy |
190,728
+14,221
| +8% | +$5.38M | 0.47% | 51 |
|
|
2021
Q1 | $62.2M | Buy |
176,507
+99,473
| +129% | +$34.6M | 0.43% | 59 |
|
|
2020
Q4 | $29M | Buy |
77,034
+8,010
| +12% | +$2.99M | 0.22% | 125 |
|
|
2020
Q3 | $24.5M | Buy |
69,024
+2,109
| +3% | +$709K | 0.23% | 116 |
|
|
2020
Q2 | $20.3M | Buy |
66,915
+5,389
| +9% | +$1.64M | 0.2% | 130 |
|
|
2020
Q1 | $17.6M | Sell |
61,526
-4,889
| -7% | -$1.48M | 0.22% | 125 |
|
|
2019
Q4 | $19.5M | Buy |
66,415
+5,487
| +9% | +$1.63M | 0.2% | 144 |
|
|
2019
Q3 | $17.6M | Sell |
60,928
-434
| -0.7% | -$122K | 0.21% | 130 |
|
|
2019
Q2 | $16.2M | Sell |
61,362
-3,792
| -6% | -$945K | 0.19% | 142 |
|
|
2019
Q1 | $15.8M | Buy |
65,154
+10,794
| +20% | +$2.36M | 0.22% | 125 |
|
|
2018
Q4 | $11.1M | Buy |
54,360
+38,235
| +237% | +$8.54M | 0.2% | 137 |
|
|
2018
Q3 | $3.79M | Buy |
16,125
+906
| +6% | +$204K | 0.1% | 200 |
|
|
2018
Q2 | $3.18M | Buy |
15,219
+6,126
| +67% | +$1.21M | 0.09% | 206 |
|
|
2018
Q1 | $1.71M | Buy |
9,093
+1,591
| +21% | +$300K | 0.06% | 238 |
|
|
2017
Q4 | $1.4M | Buy |
7,502
+204
| +3% | +$35.2K | 0.05% | 247 |
|
|
2017
Q3 | $1.2M | Buy |
7,298
+1,672
| +30% | +$263K | 0.05% | 238 |
|
|
2017
Q2 | $900K | Sell |
5,626
-7,039
| -56% | -$1.21M | 0.04% | 261 |
|
|
2017
Q1 | $2.12M | Buy |
12,665
+94
| +0.7% | +$15.8K | 0.09% | 187 |
|
|
2016
Q4 | $2.01M | Sell |
12,571
-628
| -5% | -$95.9K | 0.09% | 182 |
|
|
2016
Q3 | $2.01M | Sell |
13,199
-1,222
| -8% | -$197K | 0.1% | 182 |
|
|
2016
Q2 | $2.26M | Buy |
14,421
+6,984
| +94% | +$1.06M | 0.12% | 154 |
|
|
2016
Q1 | $1.17M | Buy |
7,437
+3,091
| +71% | +$469K | 0.07% | 228 |
|
|
2015
Q4 | $702K | Sell |
4,346
-1,240
| -22% | -$196K | 0.05% | 248 |
|
|
2015
Q3 | $808K | Buy |
5,586
+39
| +0.7% | +$5.57K | 0.04% | 276 |
|
|
2015
Q2 | $749K | Buy |
5,547
+1,569
| +39% | +$226K | 0.03% | 291 |
|
|
2015
Q1 | $603K | Sell |
3,978
-284
| -7% | -$41.7K | 0.05% | 227 |
|
|
2014
Q4 | $604K | Buy |
4,262
+594
| +16% | +$80.7K | 0.05% | 220 |
|
|
2014
Q3 | $460K | Sell |
3,668
-96
| -3% | -$11.6K | 0.05% | 222 |
|
|
2014
Q2 | $433K | Buy |
3,764
+362
| +11% | +$41.5K | 0.05% | 242 |
|
|
2014
Q1 | $380K | Buy |
3,402
+67
| +2% | +$7.66K | 0.05% | 228 |
|
|
2013
Q4 | $397K | Buy |
3,335
+200
| +6% | +$23.9K | 0.05% | 249 |
|
|
2013
Q3 | $361K | Buy |
3,135
+20
| +0.6% | +$2.31K | 0.07% | 217 |
|
|
2013
Q2 | $344K | Buy |
+3,115
| New | +$341K | 0.07% | 196 |
|
Other funds holding COST
VCM
VPM
DAM
Mariner's COST Position: Q1 2026 in Review
Mariner increased its Costco (COST) stake by 10% in Q1 2026, buying an estimated $39.7M and bringing the position to 437,088 shares worth $436M. The position accounts for 0.51% of the portfolio, ranked #36.
Mariner 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.
- Mariner held 437,088 shares of Costco worth $436M as of Q1 2026.
- Mariner bought 40,755 Costco shares in Q1 2026, an estimated $39.7M.
- Costco made up 0.51% of Mariner's portfolio in Q1 2026, its #36 holding.
- Mariner 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 Mariner's 13F filing for Q1 2026, filed 13 May 2026.