Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionBlue Fin Capital, Inc.
Latest Disclosed Ownership12,132 shares
Latest Disclosed Value $ 12,089,407
Blue Fin Capital, Inc. reports 0.71% increase in ownership of COST / Costco Wholesale Corporation

On May 28, 2026 - Blue Fin Capital, Inc. filed a 13F-HR form disclosing ownership of 12,132 shares of Costco Wholesale Corporation (MX:COST) valued at $12,089,407 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 12,047 shares of Costco Wholesale Corporation. This represents a change in shares of 0.71% 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)
2026-05-28 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 12,132 85 0.71 12,089 16.37 1.9831
2026-01-23 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 12,047 -264 -2.14 10,388 -8.84 1.6109
2025-11-21 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 12,311 -155 -1.24 11,395 -7.67 1.7915
2025-08-13 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 12,466 74 0.60 12,341 5.30 2.1012
2025-11-21 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 12,392 19 0.15 11,720 3.38 2.2735
2025-02-18 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 12,373 53 0.43 11,337 3.80 2.0894
2024-11-05 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 12,320 66 0.54 10,923 4.86 2.0756
2024-07-31 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 12,254 272 2.27 10,417 18.66 2.0799
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 11,982 384 3.31 8,779 14.67 1.9572
2024-02-06 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 11,598 148 1.29 7,656 18.35 1.9649
2023-10-19 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 11,450 219 1.95 6,469 6.98 1.8890
2023-07-31 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 11,231 21 0.19 6,047 10.01 1.7269
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 11,210 106 0.95 5,497 8.45 1.7759
2023-01-23 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 11,104 -189 -1.67 5,069 -4.97 1.8567
2022-11-04 2022-09-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 11,293 74 0.66 5,333 -0.82 2.0148
2022-08-08 2022-06-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 11,219 143 1.29 5,377 -15.69 1.9038
2022-04-12 2022-03-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 11,076 150 1.37 6,378 2.84 1.8487
2022-01-19 2021-12-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 10,926 312 2.94 6,202 30.05 1.7176
2021-10-25 2021-09-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 10,614 508 5.03 4,769 19.28 1.4559
2021-07-19 2021-06-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 10,106 244 2.47 3,998 15.02 1.2317
2021-05-05 2021-03-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 9,862 951 10.67 3,476 3.54 1.1913
2021-01-28 2020-12-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 8,911 1,336 17.64 3,357 24.84 1.2014
2020-10-28 2020-09-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 7,575 60 0.80 2,689 18.04 1.0878
2020-08-10 2020-06-30 13F COSTCO WHSL CORP NEW COM COM 22160K105 7,515 5,956 382.04 2,278 413.06 1.0083
2020-04-28 2020-03-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 1,559 799 105.13 444 99.10 0.2451
2020-02-10 2019-12-31 13F COSTCO WHSL CORP NEW COM COM 22160K105 760 760 223 0.1051
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.