Costco Wholesale Corporation
IT ˙ BIT ˙ US22160K1051
836,20 € ↑12,80 (1,55%)
2026-06-04
PREZZO DELLE AZIONI
SecurityIT:1COST / Costco Wholesale Corporation
InstitutionPlatform Technology Partners
Latest Disclosed Ownership3,816 shares
Latest Disclosed Value $ 3,802,726
Platform Technology Partners reports 7.55% increase in ownership of 1COST / Costco Wholesale Corporation

On April 27, 2026 - Platform Technology Partners filed a 13F-HR form disclosing ownership of 3,816 shares of Costco Wholesale Corporation (IT:1COST) valued at $3,430,202 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,548 shares of Costco Wholesale Corporation. This represents a change in shares of 7.55% during the quarter. The current value of the position is $3,190,939 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)
2026-04-27 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 3,816 268 7.55 3,803 24.29 0.7331
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,548 -75 -2.07 3,060 -8.77 0.6516
2025-10-29 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 3,623 -38 -1.04 3,353 -7.45 0.8037
2025-08-11 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 3,661 -3 -0.08 3,624 4.56 0.9463
2025-05-01 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 3,664 -40 -1.08 3,466 2.09 1.0091
2025-01-28 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 3,704 -42 -1.12 3,394 2.23 1.0282
2024-11-04 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 3,746 -10 -0.27 3,321 4.01 1.0442
2024-07-30 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 3,756 100 2.74 3,192 20.86 1.0988
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 3,656 -23 -0.63 2,641 27.09 1.0263
2023-11-08 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 3,679 434 13.37 2,079 20.95 0.9727
2023-07-12 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 3,245 29 0.90 1,719 7.58 0.8089
2023-04-04 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 3,216 13 0.41 1,598 9.23 0.7891
2023-01-11 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 3,203 193 6.41 1,462 2.81 0.7556
2022-10-24 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 3,010 -34 -1.12 1,422 -2.54 0.8103
2022-08-04 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 3,044 298 10.85 1,459 -7.72 0.7964
2022-05-03 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 2,746 -12 -0.44 1,581 0.96 0.7601
2022-02-01 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 2,758 -25 -0.90 1,566 25.28 0.6882
2021-11-04 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 2,783 25 0.91 1,250 14.57 0.5669
2021-08-05 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 2,758 524 23.46 1,091 29.57 0.4494
2021-02-09 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 2,234 119 5.63 842 12.12 0.4109
2020-11-30 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 2,115 667 46.06 751 81.84 0.4601
2020-11-30 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 1,448 0 0.00 413 0.00 0.3367
2020-11-30 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 1,448 149 11.47 413 8.12 0.3761
2020-12-03 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 1,299 1,299 382 0.2881
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.