Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionHyperion Asset Management Ltd
Latest Disclosed Ownership63,106 shares
Latest Disclosed Value $ 62,880,712
Hyperion Asset Management Ltd reports 15.69% decrease in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Hyperion Asset Management Ltd filed a 13F-HR form disclosing ownership of 63,106 shares of Costco Wholesale Corporation (US:COST) valued at $62,880,712 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 74,847 shares of Costco Wholesale Corporation. This represents a change in shares of -15.69% during the quarter. The current value of the position is $60,697,244 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 63,106 -11,741 -15.69 62,881 -2.58 2.0041
2026-02-17 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 74,847 4,123 5.83 64,544 -1.41 1.8037
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 70,724 14,947 26.80 65,464 18.56 1.8261
2025-07-15 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 55,777 6,383 12.92 55,216 18.20 1.7445
2025-05-15 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 49,394 -2,389 -4.61 46,716 -1.54 1.8354
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 51,783 -17,707 -25.48 47,447 -22.98 1.5722
2024-11-14 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 69,490 -3,444 -4.72 61,604 -0.63 2.3629
2024-08-14 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 72,934 -356 -0.49 61,993 15.46 2.5586
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 73,290 -5,917 -7.47 53,694 2.70 2.2569
2024-02-14 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 79,207 456 0.58 52,283 17.51 2.1503
2023-11-14 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 78,751 -3,348 -4.08 44,491 0.66 2.1411
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 82,099 -480 -0.58 44,200 7.72 1.9887
2023-05-15 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 82,579 3,297 4.16 41,031 13.37 2.1362
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 79,282 -35,861 -31.14 36,192 -33.44 2.3479
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 115,143 -2,416 -2.06 54,379 -3.49 3.1552
2022-08-15 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 117,559 -51,477 -30.45 56,344 -42.12 3.2897
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 169,036 17,652 11.66 97,339 13.26 4.0322
2022-02-14 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 151,384 23,143 18.05 85,941 49.14 3.3817
2021-11-15 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 128,241 33,077 34.76 57,625 53.04 2.6063
2021-08-16 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 95,164 5,600 6.25 37,654 19.27 2.1074
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 89,564 16,413 22.44 31,570 14.54 2.1931
2021-02-05 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 73,151 -19,310 -20.88 27,562 -16.03 1.9526
2020-10-26 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 92,461 -3,093 -3.24 32,824 13.29 3.3303
2020-08-14 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 95,554 8,771 10.11 28,973 17.09 4.0578
2020-05-04 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 86,783 10,049 13.10 24,744 9.71 5.9762
2020-01-29 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 76,734 1,169 1.55 22,554 3.60 5.1835
2019-11-12 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 75,565 257 0.34 21,771 9.40 6.3950
2019-11-12 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 75,308 -11,560 -13.31 19,901 -5.39 5.7602
2019-11-12 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 86,868 1,465 1.72 21,034 20.91 6.6109
2019-11-12 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 85,403 -9,589 -10.09 17,397 -22.03 6.8196
2019-11-12 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 94,992 4,110 4.52 22,312 17.47 7.3906
2019-11-12 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 90,882 21,768 31.50 18,993 45.84 6.7546
2019-11-12 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 69,114 2,332 3.49 13,023 4.78 5.2379
2019-11-12 2017-12-31 13F COSTCO WHSL CORP COM 22160K105 66,782 66,782 12,429 4.9212
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.