Costco Wholesale Corporation
US ˙ NasdaqGS ˙ US22160K1051

SecurityCOST / Costco Wholesale Corporation
InstitutionPrudential Plc
Latest Disclosed Ownership43,342 shares
Latest Disclosed Value $ 43,187,269
Prudential Plc reports 4.27% increase in ownership of COST / Costco Wholesale Corporation

On May 14, 2026 - Prudential Plc filed a 13F-HR form disclosing ownership of 43,342 shares of Costco Wholesale Corporation (US:COST) valued at $43,187,269 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 41,568 shares of Costco Wholesale Corporation. This represents a change in shares of 4.27% during the quarter. The current value of the position is $41,687,636 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.

Upgrade to unlock premium data and export to Excel .

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 43,342 1,774 4.27 43,187 20.48 0.1863
2026-02-11 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 41,568 29,667 249.28 35,846 225.42 0.2842
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 11,901 -4,691 -28.27 11,016 -32.94 0.0810
2025-08-12 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 16,592 -12,864 -43.67 16,425 -41.04 0.0990
2025-05-13 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 29,456 -1,793 -5.74 27,859 -2.70 0.1395
2025-02-13 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 31,249 3,158 11.24 28,633 14.97 0.1440
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 28,091 1,973 7.55 24,903 12.18 0.1251
2024-08-07 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 26,118 -3,774 -12.63 22,200 1.37 0.1497
2024-05-14 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 29,892 2,167 7.82 21,900 19.67 0.1669
2024-02-14 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 27,725 5,286 23.56 18,301 44.36 0.1857
2023-11-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 22,439 -5,517 -19.73 12,677 -15.77 0.1409
2023-08-14 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 27,956 -477 -1.68 15,051 6.53 0.1760
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 28,433 -11,755 -29.25 14,128 -22.99 0.1658
2023-02-09 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 40,188 3,665 10.03 18,346 6.35 0.2303
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 36,523 3,566 10.82 17,249 9.20 0.2729
2022-08-12 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 32,957 2,270 7.40 15,796 -10.61 0.2860
2022-05-13 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 30,687 11,164 57.18 17,671 59.44 0.2556
2022-02-11 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 19,523 1,527 8.49 11,083 37.05 0.1517
2021-11-10 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 17,996 1,834 11.35 8,087 26.46 0.1128
2021-08-13 2021-06-30 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 16,162 100 0.62 6,395 12.95 0.0593
2021-05-14 2021-03-31 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 16,062 0 0.00 5,662 -6.44 0.0392
2021-02-10 2020-12-31 13F/A-1 COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 16,062 1,109 7.42 6,052 14.02 0.0321
2021-02-08 2020-12-31 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 16,062 1,109 6,052 13,770.3939
2020-10-30 2020-09-30 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 14,953 10,235 216.94 5,308 270.93 0.0264
2020-07-31 2020-06-30 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 4,718 331 7.55 1,431 14.39 0.0069
2020-05-01 2020-03-31 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 4,387 829 23.30 1,251 19.60 0.0067
2020-02-13 2019-12-31 13F COSTCO WHOLESALE COR COSTCO WHOLESALE CORP 22160K105 3,558 -1,981 -35.76 1,046 -34.46 0.0044
2019-11-12 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 5,539 -274 -4.71 1,596 3.97 0.0047
2019-10-04 2019-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 5,813 -54 -0.92 1,535 8.10 0.0047
2019-08-14 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 5,813 -54 1,535
2019-10-04 2019-03-31 13F/A-1 Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 5,867 110 1.91 1,420 21.16 0.0051
2019-05-13 2019-03-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 5,867 110 1,420
2019-10-04 2018-12-31 13F/A-1 Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 5,757 -8,267 -58.95 1,172 -64.42 0.0047
2019-02-13 2018-12-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 5,757 -8,267 1,172
2019-10-03 2018-09-30 13F/A-1 Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 14,024 1,000 7.68 3,294 21.01 0.0106
2018-11-14 2018-09-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 14,024 1,000 3,294
2018-08-14 2018-06-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 13,024 198 1.54 2,722 12.62 0.0085
2018-05-15 2018-03-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,826 134 1.06 2,417 2.33 0.0075
2018-02-14 2017-12-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,692 -415 -3.17 2,362 9.71 0.0072
2017-11-14 2017-09-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 13,107 121 0.93 2,153 3.66 0.0068
2017-08-14 2017-06-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,986 0 0.00 2,077 -4.59 0.0068
2017-05-15 2017-03-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,986 247 1.94 2,177 6.72 0.0073
2017-02-09 2016-12-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,739 0 0.00 2,040 4.99 0.0072
2016-11-14 2016-09-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,739 2 0.02 1,943 -2.90 0.0073
2016-08-09 2016-06-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,737 0 0.00 2,001 -0.30 0.0079
2016-05-13 2016-03-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 12,737 -464 -3.51 2,007 -5.86 0.0081
2016-02-12 2015-12-31 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 13,201 10,300 355.05 2,132 408.83 0.0087
2015-11-13 2015-09-30 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,901 0 0.00 419 6.89 0.0018
2015-08-14 2015-06-30 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,901 309 11.92 392 -0.25 0.0015
2015-05-15 2015-03-31 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,592 0 0.00 393 7.08 0.0017
2015-02-13 2014-12-31 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,592 0 0.00 367 12.92 0.0016
2014-11-14 2014-09-30 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,592 -12,500 -82.83 325 -81.31 0.0013
2014-08-14 2014-06-30 13F Costco Wholesale Cor COSTCO WHOLESALE ORD SHS 22160K105 15,092 12,500 482.25 1,739 501.73 0.0073
2014-05-15 2014-03-31 13F COSTCO WHOLESALE COM STK USD0.005 22160K105 2,592 0 0.00 289 -6.17 0.0013
2014-02-14 2013-12-31 13F COSTCO WHSL CORP COM 22160K105 2,592 0 0.00 308 3.36 0.0013
2013-12-18 2013-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 2,592 0 0.00 298 3.83 0.0015
2013-11-15 2013-09-30 13F COSTCO WHSL CORP COM 22160K105 2,592 298
2013-08-15 2013-06-30 13F COSTCO WHSL CORP COM 22160K105 2,592 2,592 287 0.0016
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.