Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership290,413 shares
Latest Disclosed Value $ 289,736,464
Advisor Group Holdings, Inc. ownership in COST / Costco Wholesale Corporation

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 290,413 shares of Costco Wholesale Corporation (MX:COST) valued at $289,736,464 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 263,210 shares of Costco Wholesale Corporation. This represents a change in shares of 10.34% during the quarter.

Advisor Group Holdings, Inc. 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 106 of underlying shares valued at $227,951 USD and put options representing 9 of underlying shares valued at $137,400 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)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 290,413 27,203 10.34 289,736 27.45 0.2468
2026-02-17 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 263,210 -20,337 -7.17 227,330 -13.97 0.3322
2025-11-14 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 283,547 66,269 30.50 264,252 23.02 0.3699
2025-09-04 2025-06-30 13F/A-1 OSTCO WHSL CORP COM 22160K105 217,278 21,532 11.00 214,802 15.81 0.3824
2025-08-13 2025-06-30 13F OSTCO WHSL CORP COM 22160K105 178,792 -16,954 166,096 0.1921
2025-05-12 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 195,746 -33,982 -14.79 185,475 7.18 0.4133
2025-06-06 2024-12-31 13F/A-1 COSTCO WHSL CORP COM 22160K105 229,728 39,663 20.87 173,043 2.55 0.3884
2025-02-07 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 204,573 14,508 146,385 0.3734
2024-11-13 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 190,065 -7,405 -3.75 168,741 0.41 0.3805
2024-08-13 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 197,470 -62,274 -23.98 168,056 -11.74 0.3971
2024-05-10 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 259,744 -21,995 -7.81 190,414 2.33 0.4253
2024-02-12 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 281,739 -60,583 -17.70 186,087 -3.83 0.3256
2023-11-13 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 342,322 71,440 26.37 193,502 32.68 0.2859
2023-08-21 2023-06-30 13F/A-1 COSTCO WHSL CORP COM 22160K105 270,882 3,051 1.14 145,845 9.56 0.2619
2023-08-10 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 2,535,938 2,268,107 143,580 0.0389
2023-05-12 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 267,831 3,467 1.31 133,123 10.25 0.2505
2023-02-10 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 264,364 7,554 2.94 120,749 -0.49 0.2445
2022-11-14 2022-09-30 13F COSTCO WHSL CORP COM 22160K105 256,810 419 0.16 121,343 -1.31 0.2774
2022-08-10 2022-06-30 13F COSTCO WHSL CORP COM 22160K105 256,391 -9,097 -3.43 122,959 -17.13 0.2712
2022-05-04 2022-03-31 13F COSTCO WHSL CORP COM 22160K105 265,488 14,278 5.68 148,374 3.99 0.2879
2022-02-03 2021-12-31 13F COSTCO WHSL CORP COM 22160K105 251,210 7,350 3.01 142,682 30.14 0.2701
2021-11-05 2021-09-30 13F COSTCO WHSL CORP COM 22160K105 243,860 12,892 5.58 109,635 19.90 0.2285
2021-08-02 2021-06-30 13F COSTCO WHSL CORP COM 22160K105 230,968 -2,775 -1.19 91,435 10.85 0.1979
2021-05-13 2021-03-31 13F COSTCO WHSL CORP COM 22160K105 233,743 6,733 2.97 82,486 -3.62 0.1985
2021-02-10 2020-12-31 13F COSTCO WHSL CORP COM 22160K105 227,010 -5,680 -2.44 85,585 4.05 0.2285
2020-11-12 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 232,690 2,985 1.30 82,257 18.08 0.2461
2020-08-14 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 229,705 -1,388,859 -85.81 69,665 11.31 0.2338
2020-05-18 2020-03-31 13F COSTCO WHSL CORP COM 22160K105 1,618,564 1,618,564 62,588 0.2562
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
(%)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE CALL Call 106 228 n/a n/a n/a
2026-05-15 2026-03-31 13F COSTCO WHOLESALE CALL Put 9 28.57 137 -15.95 n/a n/a n/a
2026-02-17 2025-12-31 13F COSTCO WHSL CORP CALL Call 4 100.00 61 154.17 n/a n/a n/a
2025-11-14 2025-09-30 13F COSTCO WHSL CORP CALL Call 2 0.00 25 -25.00 n/a n/a n/a
2025-09-04 2025-06-30 13F/A COSTCO WHSL CORP CALL Call 2 -50.00 33 10.34 n/a n/a n/a
2025-08-13 2025-06-30 13F COSTCO WHSL CORP CALL Call 1 17 n/a n/a n/a
2025-05-12 2025-03-31 13F COSTCO WHSL CORP CALL Call 4 300.00 30 70.59 n/a n/a n/a
2025-06-06 2024-12-31 13F/A COSTCO WHSL CORP CALL Call 1 0.00 17 -51.43 n/a n/a n/a
2025-02-07 2024-12-31 13F COSTCO WHSL CORP CALL Call 1 36 n/a n/a n/a
2024-11-13 2024-09-30 13F COSTCO WHSL CORP CALL Call 1 0.00 36 9.38 n/a n/a n/a
2024-08-13 2024-06-30 13F COSTCO WHSL CORP CALL Call 1 0.00 33 52.38 n/a n/a n/a
2024-05-10 2024-03-31 13F COSTCO WHSL CORP CALL Call 1 0.00 22 40.00 n/a n/a n/a
2024-02-12 2023-12-31 13F COSTCO WHSL CORP NEW CALL COM Call 1 0.00 16 650.00 n/a n/a n/a
2023-11-13 2023-09-30 13F COSTCO WHSL CORP NEW CALL COM Call 1 3 n/a n/a n/a
2023-02-10 2022-12-31 13F COSTCO WHSL CORP NEW CALL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F COSTCO WHSL CORP NEW CALL COM Call 5 0.00 25 -26.47 n/a n/a n/a
2022-08-10 2022-06-30 13F COSTCO WHSL CORP NEW CALL COM Call 5 400.00 34 88.89 n/a n/a n/a
2022-05-04 2022-03-31 13F COSTCO WHSL CORP NEW CALL COM Call 1 0.00 18 5.88 n/a n/a n/a
2022-02-03 2021-12-31 13F COSTCO WHSL CORP NEW CALL COM Call 1 17 n/a n/a n/a
2021-08-02 2021-06-30 13F COSTCO WHSL CORP NEW CALL COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-05-13 2021-03-31 13F COSTCO WHSL CORP NEW CALL COM Call 8 0.00 48 -30.43 n/a n/a n/a
2021-02-10 2020-12-31 13F COSTCO WHSL CORP NEW CALL COM Call 8 0.00 69 38.00 n/a n/a n/a
2020-11-12 2020-09-30 13F COSTCO WHSL CORP NEW CALL COM Call 8 0.00 50 138.10 n/a n/a n/a
2020-08-14 2020-06-30 13F COSTCO WHSL CORP NEW CALL COM Call 8 -55.56 21 -60.38 n/a n/a n/a
2020-05-18 2020-03-31 13F COSTCO WHSL CORP NEW CALL COM Call 18 53 n/a n/a n/a
Disclosed Put 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
(%)
2026-05-15 2026-03-31 13F COSTCO WHOLESALE CALL Put 9 28.57 137 -15.95 n/a n/a n/a
2026-02-17 2025-12-31 13F COSTCO WHSL CORP PUT Put 7 75.00 163 94.05 n/a n/a n/a
2025-11-14 2025-09-30 13F COSTCO WHSL CORP PUT Put 4 0.00 84 5.00 n/a n/a n/a
2025-09-04 2025-06-30 13F/A COSTCO WHSL CORP PUT Put 4 300.00 81 247.83 n/a n/a n/a
2025-05-12 2025-03-31 13F COSTCO WHSL CORP PUT Put 1 24 n/a n/a n/a
2021-05-13 2021-03-31 13F COSTCO WHSL CORP NEW PUT COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-10 2020-12-31 13F COSTCO WHSL CORP NEW PUT COM Put 3 0.00 3 0.00 n/a n/a n/a
2020-11-12 2020-09-30 13F COSTCO WHSL CORP NEW PUT COM Put 3 0.00 3 -50.00 n/a n/a n/a
2020-08-14 2020-06-30 13F COSTCO WHSL CORP NEW PUT COM Put 3 0.00 6 20.00 n/a n/a n/a
2020-05-18 2020-03-31 13F COSTCO WHSL CORP NEW PUT COM Put 3 5 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.