Costco Wholesale Corporation
DE ˙ XTRA ˙ US22160K1051
843,00 € ↑27,00 (3,31%)
2026-06-04
AKTIENPREIS
SecurityDE:CTO / Costco Wholesale Corporation
InstitutionAdvisor OS, LLC
Latest Disclosed Ownership3,326 shares
Latest Disclosed Value $ 3,314,508
Advisor OS, LLC ownership in CTO / Costco Wholesale Corporation

On May 7, 2026 - Advisor OS, LLC filed a 13F-HR form disclosing ownership of 3,326 shares of Costco Wholesale Corporation (DE:CTO) valued at $2,889,961 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 3,196 shares of Costco Wholesale Corporation. This represents a change in shares of 4.07% during the quarter. The current value of the position is $2,803,818 USD.

Advisor OS, LLC has a history of taking positions in derivatives of the underlying security (CTO) in the form of stock options. The firm currently holds call options representing 300 of underlying shares valued at $140 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.

DE:CTO / 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)
2026-05-07 2026-03-31 13F COSTCO WHOLESALE COM 22160K105 3,326 130 4.07 3,315 20.29 0.2400
2026-02-04 2025-12-31 13F COSTCO WHSL CORP COM 22160K105 3,196 -17 -0.53 2,756 -7.36 0.0814
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM 22160K105 3,213 26 0.82 2,974 -5.74 0.2567
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM 22160K105 3,187 157 5.18 3,155 10.12 0.3105
2025-05-06 2025-03-31 13F COSTCO WHSL CORP COM 22160K105 3,030 224 7.98 2,866 11.44 0.3261
2025-02-05 2024-12-31 13F COSTCO WHSL CORP COM 22160K105 2,806 19 0.68 2,571 4.09 0.2978
2024-11-04 2024-09-30 13F COSTCO WHSL CORP COM 22160K105 2,787 155 5.89 2,471 10.42 0.2459
2024-08-05 2024-06-30 13F COSTCO WHSL CORP COM 22160K105 2,632 86 3.38 2,237 19.95 0.2450
2024-05-09 2024-03-31 13F COSTCO WHSL CORP COM 22160K105 2,546 510 25.05 1,865 38.76 0.2144
2024-02-08 2023-12-31 13F COSTCO WHSL CORP COM 22160K105 2,036 649 46.79 1,344 71.65 0.1750
2023-11-03 2023-09-30 13F COSTCO WHSL CORP COM 22160K105 1,387 238 20.71 784 26.70 0.1175
2023-08-08 2023-06-30 13F COSTCO WHSL CORP COM 22160K105 1,149 679 144.47 619 165.24 0.1012
2023-04-25 2023-03-31 13F COSTCO WHSL CORP COM 22160K105 470 -138 -22.70 234 -15.88 0.0561
2023-02-01 2022-12-31 13F COSTCO WHSL CORP COM 22160K105 608 608 278 0.0737
2020-11-12 2020-09-30 13F COSTCO WHSL CORP COM 22160K105 0 -930 -100.00 0 -100.00
2020-08-28 2020-06-30 13F COSTCO WHSL CORP COM 22160K105 930 930 282 0.1681
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
(%)
2026-05-07 2026-03-31 13F COSTCO WHOLESALE COM Call 300 0.00 0 -100.00 n/a n/a n/a
2026-02-04 2025-12-31 13F COSTCO WHSL CORP COM Call 300 0.00 2 n/a n/a n/a
2025-11-12 2025-09-30 13F COSTCO WHSL CORP COM Call 300 0.00 0 -100.00 n/a n/a n/a
2025-08-14 2025-06-30 13F COSTCO WHSL CORP COM Call 300 2 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.