Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
Institution1832 Asset Management L.P.
Latest Disclosed Ownership470,973 shares
Latest Disclosed Value $ 469,291,626
1832 Asset Management L.P. reports 43.68% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - 1832 Asset Management L.P. filed a 13F-HR form disclosing ownership of 470,973 shares of Costco Wholesale Corporation (US:COST) valued at $469,291,626 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 327,789 shares of Costco Wholesale Corporation. This represents a change in shares of 43.68% during the quarter. The current value of the position is $457,724,530 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 470,973 143,184 43.68 469,292 66.02 0.4314
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 327,789 58,629 21.78 282,666 13.46 0.2153
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 269,160 -1,850 -0.68 249,143 -7.13 0.1967
2025-08-13 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 271,010 -22,729 -7.74 268,284 -3.43 0.2093
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 293,739 -262,045 -47.15 277,812 -45.45 0.2525
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 555,784 -45,451 -7.56 509,248 -4.46 0.4329
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 601,235 34,371 6.06 533,007 10.62 0.4055
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 566,864 205,237 56.75 481,829 81.86 0.3914
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 361,627 -167,569 -31.66 264,939 -24.15 0.1568
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 529,196 82,612 18.50 349,312 38.45 0.5031
2023-11-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 446,584 -6,054 -1.34 252,302 3.53 0.3579
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 452,638 -11,837 -2.55 243,691 5.59 0.4738
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 464,475 -3,528 -0.75 230,784 8.02 0.4747
2023-02-15 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 468,003 -9,416 -1.97 213,643 -5.25 0.4392
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 477,419 -56,396 -10.56 225,471 -11.87 0.4803
2022-08-15 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 533,815 -626,300 -53.99 255,847 -61.17 0.5155
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 1,160,115 56,369 5.11 658,921 4.75 1.0756
2022-02-15 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 1,103,746 -78,098 -6.61 629,037 17.15 1.1131
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 1,181,844 636,131 116.57 536,943 147.59 1.0062
2021-08-20 2021-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 545,713 104,801 23.77 216,871 39.99 0.4193
2021-08-16 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 545,713 104,801 216,871 0.4200
2021-05-17 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 440,912 -1,017,491 -69.77 154,922 -71.73 0.3348
2021-02-16 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 1,458,403 91,160 6.67 548,032 13.02 1.2817
2020-11-16 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 1,367,243 532,083 63.71 484,903 91.12 1.2660
2020-08-14 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 835,160 -701,917 -45.67 253,719 -43.62 0.7615
2020-05-26 2020-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 1,537,077 572,815 59.40 450,013 57.42 1.6227
2020-05-14 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 85,505 -878,757 24,547 185,600.7622
2020-02-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 964,262 -929,683 -49.09 285,859 -47.24 0.8702
2019-11-14 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 1,893,945 193,058 11.35 541,813 19.85 1.7244
2019-08-14 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 1,700,887 303,087 21.68 452,089 33.55 1.4622
2019-05-15 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 1,397,800 11,361 0.82 338,507 19.86 1.1531
2019-02-14 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 1,386,439 -476,892 -25.59 282,410 -35.50 1.1166
2018-11-14 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 1,863,331 -19,547 -1.04 437,815 11.14 1.4278
2018-08-14 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 1,882,878 81,871 4.55 393,940 15.55 1.3339
2018-05-15 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 1,801,007 -450,953 -20.02 340,922 -18.32 1.2560
2018-02-14 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 2,251,960 -111,180 -4.70 417,383 10.69 1.3564
2017-11-14 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 2,363,140 773,070 48.62 377,057 48.11 1.3209
2017-08-14 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 1,590,070 36,763 2.37 254,583 -2.43 1.1523
2017-05-15 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 1,553,307 -259,935 -14.34 260,929 -10.13 0.9330
2017-04-01 2016-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 1,813,242 403,665 28.64 290,351 35.06 0.8905
2017-02-14 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 1,420,429 212,759
2016-11-15 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 1,409,577 -424,932 -23.16 214,974 -25.86 0.8077
2016-08-12 2016-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 1,834,509 771,240 72.53 289,953 2.85 1.1277
2016-08-12 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 1,834,509 771,240 483,965 1.1662
2016-05-12 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 1,063,269 -81,200 -7.09 281,914 50.95 0.6869
2016-02-12 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 1,144,469 107,510 10.37 186,758 24.17 0.8071
2015-11-12 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 1,036,959 528,194 103.82 150,400 119.44 0.6292
2015-08-13 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 508,765 -53,250 -9.47 68,539 -19.51 0.2325
2015-05-13 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 562,015 -178,507 -24.11 85,154 -18.49 0.3203
2015-02-12 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 740,522 129,725 21.24 104,471 36.76 0.3235
2014-11-12 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 610,797 -781,992 -56.15 76,390 -52.40 0.2493
2014-08-13 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 1,392,789 520,047 59.59 160,489 64.53 0.5056
2014-05-14 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 872,742 -81,868 -8.58 97,542 -14.19 0.3353
2014-02-13 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 954,610 -495,680 -34.18 113,677 -31.78 0.4372
2013-11-13 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 1,450,290 -10,010 -0.69 166,643 3.24 0.7388
2013-08-14 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 1,460,300 1,460,300 161,406 0.7068
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.