Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionFred Alger Management, Llc
Latest Disclosed Ownership3,786 shares
Latest Disclosed Value $ 3,772,484
Fred Alger Management, Llc reports 158.43% increase in ownership of COST / Costco Wholesale Corporation

On May 15, 2026 - Fred Alger Management, Llc filed a 13F-HR form disclosing ownership of 3,786 shares of Costco Wholesale Corporation (MX:COST) valued at $3,772,484 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,465 shares of Costco Wholesale Corporation. This represents a change in shares of 158.43% 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)
2026-05-15 2026-03-31 13F Costco Wholesale Equity 22160K105 3,786 2,321 158.43 3,772 198.65 0.0105
2026-02-17 2025-12-31 13F Costco Wholesale Equity 22160K105 1,465 -197 -11.85 1,263 -17.88 0.0050
2025-11-14 2025-09-30 13F Costco Wholesale Equity 22160K105 1,662 -10,713 -86.57 1,538 -87.44 0.0060
2025-08-14 2025-06-30 13F Costco Wholesale Equity 22160K105 12,375 2,245 22.16 12,251 27.87 0.0548
2025-05-16 2025-03-31 13F Costco Wholesale Equity 22160K105 10,130 10,130 9,581 0.0546
2023-11-14 2023-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 0 -151 -100.00 0 -100.00
2023-11-14 2023-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 0 0
2023-08-14 2023-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 151 -37,561 -99.60 81 -99.57 0.0004
2023-05-16 2023-03-31 13F/A-1 COSTCO WHOLESALE CORP Common 22160K105 37,712 -88,460 -70.11 18,738 -67.47 0.1002
2023-05-15 2023-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 37,712 -88,460 18,738 0.0929
2023-02-14 2022-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 126,172 -188,512 -59.91 57,598 -61.24 0.3122
2022-11-15 2022-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 314,684 -103,934 -24.83 148,616 -25.93 0.7530
2022-08-15 2022-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 418,618 326,177 352.85 200,635 276.91 0.9369
2022-05-16 2022-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 92,441 91,299 7,994.66 53,232 8,114.81 0.1701
2022-02-14 2021-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 1,142 1,142 648 0.0016
2020-11-13 2020-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 0 -110 -100.00 0 -100.00
2020-08-14 2020-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 110 -44,049 -99.75 33 -99.74 0.0001
2020-05-19 2020-03-31 13F/A-1 COSTCO WHOLESALE CORP Common 22160K105 44,159 34,059 337.22 12,591 324.08 0.0553
2020-05-15 2020-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 44,159 34,059 12,591 55,397.3184
2020-02-14 2019-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 10,100 -4,130 -29.02 2,969 -27.59 0.0109
2019-11-14 2019-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 14,230 13,981 5,614.86 4,100 6,112.12 0.0161
2019-08-14 2019-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 249 -118 -32.15 66 -25.84 0.0003
2019-05-14 2019-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 367 -161,968 -99.77 89 -99.73 0.0004
2019-02-14 2018-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 162,335 162,210 129,768.00 33,069 113,931.03 0.1522
2018-11-14 2018-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 125 125 -99.92 29 -99.91 0.0001
2017-11-14 2017-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 0 -145 -100.00 0 -100.00
2017-08-14 2017-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 145 -478,060 -99.97 23 -99.97 0.0001
2017-05-15 2017-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 478,205 -119,718 -20.02 80,190 -16.24 0.3991
2017-02-14 2016-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 597,923 73,095 13.93 95,734 19.61 0.5209
2016-11-14 2016-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 524,828 -115,198 -18.00 80,041 -20.37 0.4109
2016-08-15 2016-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 640,026 208,308 48.25 100,510 47.74 0.5307
2016-05-16 2016-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 431,718 431,593 345,274.40 68,030 340,050.00 0.3446
2016-02-16 2015-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 125 -167,490 -99.93 20 -99.92 0.0001
2015-11-16 2015-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 167,615 131,792 367.90 24,232 400.87 0.1322
2015-08-14 2015-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 35,823 -39,258 -52.29 4,838 -57.46 0.0218
2015-05-15 2015-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 75,081 75,081 109.59 11,374 135.10 0.0512
2014-11-14 2014-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 0 -69 -100.00 0 -100.00
2014-08-14 2014-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 69 -22 -24.18 8 -20.00 0.0000
2014-05-15 2014-03-31 13F COSTCO WHOLESALE CORP Common 22160K105 91 -37,648 -99.76 10 -99.78 0.0000
2014-02-14 2013-12-31 13F COSTCO WHOLESALE CORP Common 22160K105 37,739 0 0.00 4,492 3.36 0.0229
2013-11-14 2013-09-30 13F COSTCO WHOLESALE CORP Common 22160K105 37,739 -95,026 -71.57 4,346 -70.40 0.0242
2013-08-14 2013-06-30 13F COSTCO WHOLESALE CORP Common 22160K105 132,765 132,765 14,680 0.0872
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.