Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAptus Capital Advisors, LLC
Latest Disclosed Ownership30,381 shares
Latest Disclosed Value $ 30,272,772
Aptus Capital Advisors, LLC ownership in COST / Costco Wholesale Corporation

On May 11, 2026 - Aptus Capital Advisors, LLC filed a 13F-HR form disclosing ownership of 30,381 shares of Costco Wholesale Corporation (MX:COST) valued at $30,272,772 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 30,914 shares of Costco Wholesale Corporation. This represents a change in shares of -1.72% during the quarter.

Aptus Capital Advisors, LLC has a history of taking positions in derivatives of the underlying security (COST) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:COST / Costco Wholesale Corporation Historical Put/Call Ratio
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)
2026-05-11 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 30,381 -533 -1.72 30,273 13.56 0.2293
2026-02-13 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 30,914 771 2.56 26,659 -4.46 0.1909
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 30,143 -3,754 -11.07 27,901 -16.85 0.2029
2025-08-11 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 33,897 3,291 10.75 33,556 15.93 0.2734
2025-05-13 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 30,606 4,044 15.22 28,947 18.93 0.2979
2025-02-14 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 26,562 3,599 15.67 24,338 19.56 0.2549
2024-11-05 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 22,963 3,561 18.35 20,357 23.44 0.3037
2024-07-31 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 19,402 3,647 23.15 16,492 42.88 0.2904
2024-05-15 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 15,755 1,054 7.17 11,543 18.95 0.2147
2024-02-13 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 14,701 118 0.81 9,704 17.78 0.2653
2023-11-08 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 14,583 413 2.91 8,239 8.00 0.2244
2023-08-11 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 14,170 381 2.76 7,629 11.34 0.1829
2023-05-09 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 13,789 3,131 29.38 6,852 40.82 0.1841
2023-02-13 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 10,658 403 3.93 4,865 0.45 0.1494
2022-11-02 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 10,255 -2,868 -21.85 4,843 -22.99 0.1166
2022-07-29 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 13,123 10,384 379.12 6,289 298.80 0.1636
2022-05-04 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 2,739 -6,311 -69.73 1,577 -69.30 0.0393
2022-02-02 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 9,050 587 6.94 5,137 35.08 0.1542
2021-10-27 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 8,463 -1,230 -12.69 3,803 -0.86 0.0981
2021-07-27 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 9,693 1,156 13.54 3,836 27.48 0.1121
2021-05-06 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 8,537 -310 -3.50 3,009 -9.72 0.1079
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 8,847 1,133 14.69 3,333 21.73 0.1526
2020-10-19 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 7,714 172 2.28 2,738 19.77 0.1453
2020-07-22 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 7,542 -8,367 -52.59 2,286 -49.59 0.1435
2020-05-07 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 15,909 15,020 1,689.54 4,535 1,637.55 0.3920
2020-02-10 2019-12-31 13F COSTCO WHSL CORP COM 22160K105 889 44 5.21 261 7.41 0.0185
2019-11-14 2019-09-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 845 0 0.00 243 8.97 0.0136
2019-11-12 2019-09-30 13F COSTCO WHSL CORP COM 22160K105 845 0 243 0.0136
2019-08-13 2019-06-30 13F COSTCO WHSL CORP COM 22160K105 845 0 0.00 223 9.31 0.0314
2019-05-15 2019-03-31 13F COSTCO WHSL CORP COM 22160K105 845 845 204 0.0348
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2020-10-19 2020-09-30 13F COSTCO WHSL CORP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-07-22 2020-06-30 13F COSTCO WHSL CORP COM Call 87,000 265.55 26,379 288.73 n/a n/a n/a
2020-05-07 2020-03-31 13F COSTCO WHSL CORP COM Call 23,800 -61.61 6,786 -62.76 n/a n/a n/a
2020-02-10 2019-12-31 13F COSTCO WHSL CORP COM Call 62,000 18,223 n/a n/a n/a
2019-05-15 2019-03-31 13F COSTCO WHSO CORP CLL OPT 4/19 195 Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-02-12 2018-12-31 13F COSTCO WHSO CORP CLL OPT 4/19 195 Call 162 267 n/a n/a n/a
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.