Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionSilvant Capital Management LLC
Latest Disclosed Ownership16,806 shares
Latest Disclosed Value $ 16,746,003
Silvant Capital Management LLC reports 6.54% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Silvant Capital Management LLC filed a 13F-HR form disclosing ownership of 16,806 shares of Costco Wholesale Corporation (MX:COST) valued at $16,746,003 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,774 shares of Costco Wholesale Corporation. This represents a change in shares of 6.54% 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)
2026-05-14 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 16,806 1,032 6.54 16,746 23.11 0.3355
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 15,774 65 0.41 13,603 -6.45 0.4594
2025-11-18 2025-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 15,709 978 6.64 14,541 -0.29 0.5043
2025-11-13 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 14,462 -269 13,386 0.2692
2025-08-13 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 14,731 -198 -1.33 14,583 3.28 0.5516
2025-05-14 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 14,929 173 1.17 14,120 4.43 0.6494
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 14,756 -65 -0.44 13,520 2.90 0.5614
2024-10-29 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 14,821 -1,006 -6.36 13,139 -2.33 0.5763
2024-07-25 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 15,827 -126 -0.79 13,453 15.10 0.5968
2024-04-30 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 15,953 413 2.66 11,688 11.41 0.5579
2024-01-25 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 15,540 -1,249 -7.44 10,491 10.60 0.5635
2023-10-24 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 16,789 -476 -2.76 9,485 2.04 0.5730
2023-07-25 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 17,265 619 3.72 9,295 12.39 0.5227
2023-04-26 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 16,646 -219 -1.30 8,271 7.43 0.5383
2023-01-23 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 16,865 189 1.13 7,699 -2.26 0.5451
2022-11-09 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 16,676 -101 -0.60 7,876 -2.05 0.5358
2022-08-03 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 16,777 -3,393 -16.82 8,041 -30.77 1.9487
2022-05-05 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 20,170 -341 -1.66 11,615 -0.25 2.2123
2022-02-07 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 20,511 -991 -4.61 11,644 20.51 1.9896
2021-11-08 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 21,502 -3,366 -13.54 9,662 -1.81 1.7255
2021-08-03 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 24,868 -529 -2.08 9,840 9.92 1.5504
2021-05-11 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 25,397 -458 -1.77 8,952 -8.11 1.5290
2021-02-05 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 25,855 -364 -1.39 9,742 4.66 1.6643
2020-11-09 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 26,219 -4,569 -14.84 9,308 -0.29 1.7420
2020-08-11 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 30,788 -1,378 -4.28 9,335 1.79 1.6783
2020-05-13 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 32,166 -445 -1.36 9,171 -4.32 1.9984
2020-02-10 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 32,611 -319 -0.97 9,585 1.02 1.7482
2019-11-12 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 32,930 -3,254 -8.99 9,488 -0.77 1.8751
2019-08-09 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 36,184 -2,659 -6.85 9,562 1.67 1.7127
2019-05-10 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 38,843 7,939 25.69 9,405 49.38 1.6893
2019-02-06 2018-12-31 13F COSTCO WHSL CORP COM 22160K105 30,904 -864 -2.72 6,296 -15.61 1.2585
2018-11-07 2018-09-30 13F COSTCO WHSL CORP COM 22160K105 31,768 -5,360 -14.44 7,461 -3.84 0.9203
2018-08-13 2018-06-30 13F COSTCO WHSL CORP COM 22160K105 37,128 -431 -1.15 7,759 9.64 0.9588
2018-05-09 2018-03-31 13F COSTCO WHSL CORP COM 22160K105 37,559 37,559 7,077 0.9084
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.