Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFirst Trust Advisors Lp
Latest Disclosed Ownership692,252 shares
Latest Disclosed Value $ 689,781,082
First Trust Advisors Lp reports 18.04% increase in ownership of COST / Costco Wholesale Corporation

On May 13, 2026 - First Trust Advisors Lp filed a 13F-HR form disclosing ownership of 692,252 shares of Costco Wholesale Corporation (MX:COST) valued at $689,781,082 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 586,470 shares of Costco Wholesale Corporation. This represents a change in shares of 18.04% during the quarter.

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)
2026-05-13 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 692,252 105,782 18.04 689,781 36.39 0.4929
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 586,470 96,622 19.72 505,737 11.54 0.3676
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 489,848 47,253 10.68 453,418 3.49 0.3369
2025-08-13 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 442,595 12,577 2.92 438,142 7.73 0.3524
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 430,018 108,809 33.87 406,702 38.19 0.3602
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 321,209 19,749 6.55 294,314 10.13 0.2594
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 301,460 -26,411 -8.06 267,250 -4.10 0.2546
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 327,871 -6,077 -1.82 278,687 13.91 0.2841
2024-05-13 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 333,948 -40,472 -10.81 244,661 -1.01 0.2483
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 374,420 -13,098 -3.38 247,147 12.89 0.2697
2023-11-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 387,518 -16,099 -3.99 218,932 0.75 0.2595
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 403,617 -16,049 -3.82 217,299 4.21 0.2471
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 419,666 33,040 8.55 208,519 18.15 0.2408
2023-02-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 386,626 307,936 391.33 176,495 374.92 0.2099
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 78,690 -303,349 -79.40 37,163 -79.70 0.0482
2022-08-12 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 382,039 -66,159 -14.76 183,104 -29.06 0.2261
2022-05-13 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 448,198 -68,334 -13.23 258,095 -11.98 0.2640
2022-02-08 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 516,532 4,522 0.88 293,235 27.45 0.2853
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 512,010 -21,493 -4.03 230,072 8.99 0.2474
2021-10-12 2021-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 533,503 34,164 6.84 211,091 19.93 0.2285
2021-08-16 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 551,003 51,664 218,016 0.2249
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 499,339 -61,545 -10.97 176,018 -16.71 0.2131
2021-02-02 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 560,884 29,239 5.50 211,330 11.97 0.2800
2020-11-05 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 531,645 56,334 11.85 188,734 30.96 0.3023
2020-07-22 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 475,311 161,479 51.45 144,119 61.06 0.2498
2020-05-06 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 313,832 41,960 15.43 89,483 11.98 0.2027
2020-02-03 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 271,872 11,521 4.43 79,909 6.53 0.1365
2019-11-04 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 260,351 2,639 1.02 75,010 10.14 0.1412
2019-07-30 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 257,712 22,819 9.71 68,103 19.74 0.1284
2019-06-19 2019-03-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 234,893 -18,756 -7.39 56,877 10.08 0.1131
2019-05-09 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 234,893 -18,756 56,877
2019-02-07 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 253,649 4,803 1.93 51,671 -11.60 0.1225
2018-10-25 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 248,846 33,792 15.71 58,449 30.05 0.1088
2018-08-02 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 215,054 92,023 74.80 44,942 93.86 0.0932
2018-04-23 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 123,031 7,708 6.68 23,183 8.01 0.0532
2018-02-08 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 115,323 69,580 152.11 21,464 185.62 0.0511
2017-10-24 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 45,743 -81,847 -64.15 7,515 -63.17 0.0193
2017-08-02 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 127,590 12,071 10.45 20,405 5.34 0.0545
2017-05-02 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 115,519 27,089 30.63 19,371 36.81 0.0537
2017-02-06 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 88,430 -40,621 -31.48 14,159 -28.06 0.0421
2016-11-01 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 129,051 4,773 3.84 19,682 0.85 0.0588
2016-08-04 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 124,278 -200,572 -61.74 19,517 -61.87 0.0615
2016-05-10 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 324,850 70,615 27.78 51,190 24.67 0.1644
2016-05-04 2015-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 254,235 127,675 100.88 41,059 124.40 0.1066
2016-02-03 2015-12-31 13F COSTCO WHSL CORP COM 22160K105 254,235 41,059
2015-11-05 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 126,560 -187,782 -59.74 18,297 -56.90 0.0530
2015-08-04 2015-06-30 13F COSTCO WHSL CORP COM 22160K105 314,342 15,597 5.22 42,455 -6.19 0.1102
2015-05-04 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 298,745 92,272 44.69 45,258 54.63 0.1329
2015-02-13 2014-12-31 13F COSTCO WHSL CORP COM 22160K105 206,473 114,113 123.55 29,268 152.86 0.0987
2014-11-12 2014-09-30 13F COSTCO WHSL CORP COM 22160K105 92,360 28,980 45.72 11,575 58.58 0.0455
2014-08-11 2014-06-30 13F COSTCO WHSL CORP COM 22160K105 63,380 952 1.52 7,299 4.69 0.0303
2014-05-12 2014-03-31 13F COSTCO WHSL CORP COM 22160K105 62,428 -53,190 -46.00 6,972 -49.34 0.0306
2014-08-08 2013-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 115,618 -6,564 -5.37 13,761 -2.21 0.0667
2014-02-13 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 115,618 13,761
2013-11-12 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 122,182 44,717 57.73 14,072 64.30 0.0763
2013-08-12 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 77,465 77,465 8,565 0.0557
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.