Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionDynamic Technology Lab Private Ltd
Latest Disclosed Ownership1,567 shares
Latest Disclosed Value $ 1,561,406
Dynamic Technology Lab Private Ltd ownership in COST / Costco Wholesale Corporation

On May 15, 2026 - Dynamic Technology Lab Private Ltd filed a 13F-HR form disclosing ownership of 1,567 shares of Costco Wholesale Corporation (US:COST) valued at $1,561,406 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 0 shares of Costco Wholesale Corporation. The current value of the position is $1,507,188 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)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 1,567 1,567 1,561 0.2537
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 0 -1,290 -100.00 0 -100.00
2025-11-13 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 1,290 1,290 1,194 0.2022
2025-08-12 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 0 -817 -100.00 0 -100.00
2025-05-16 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 817 378 86.10 772 92.04 0.1117
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 439 439 402 0.0646
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -1,281 -100.00 0 -100.00
2024-08-15 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 1,281 -1,660 -56.44 1 -50.00 0.1230
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 2,941 -2,490 -45.85 2 -33.33 0.2302
2024-02-09 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 5,431 5,431 4 0.3791
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -4,961 -100.00 0 -100.00
2023-02-14 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 4,961 4,961 2,265 0.2264
2022-08-12 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 0 -494 -100.00 0 -100.00
2022-05-16 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 494 494 284 0.0335
2021-05-14 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -3,111 -100.00 0 -100.00
2021-02-11 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 3,111 969 45.24 1,172 54.21 0.1894
2020-11-13 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 2,142 -747 -25.86 760 -13.24 0.1224
2020-08-14 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 2,889 -7,753 -72.85 876 -71.13 0.1318
2020-05-13 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 10,642 8,707 449.97 3,034 433.22 0.5918
2020-02-14 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,935 -6,211 -76.25 569 -75.76 0.0912
2019-11-14 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 8,146 8,146 2,347 0.4122
2017-11-08 2017-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -16,040 -100.00 0 -100.00
2017-08-17 2017-06-30 13F COSTCO WHSL CORP COM 22160K105 16,040 16,040 2,565 0.4843
2017-05-11 2017-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -19,087 -100.00 0 -100.00
2017-02-13 2016-12-31 13F COSTCO WHSL CORP COM 22160K105 19,087 11,055 137.64 3,056 149.47 0.8206
2016-11-14 2016-09-30 13F COSTCO WHSL CORP COM 22160K105 8,032 2,607 48.06 1,225 43.95 0.3283
2016-08-10 2016-06-30 13F COSTCO WHSL CORP COM 22160K105 5,425 5,425 0.00 851 0.2302
2016-05-18 2016-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -3,585 -100.00 0 -100.00
2016-03-01 2015-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,585 3,585 0.00 484 0.00 0.2713
2015-11-16 2015-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -3,585 -100.00 0 -100.00
2016-03-01 2015-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,585 3,585 -9.49 484 -13.73 0.3926
2015-05-12 2015-03-31 13F COSTCO WHSL CORP COM 22160K105 0 -3,961 -100.00 0 -100.00
2016-02-24 2014-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,961 544 15.92 561 42.39 0.6622
2016-02-24 2014-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 3,417 453 15.28 394 15.54 0.5090
2016-02-22 2013-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 2,964 -2,094 -41.40 341 -32.61 0.5848
2016-02-17 2012-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,058 5,058 506 0.9928
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.