Costco Wholesale Corporation
MX ˙ BMV ˙ US22160K1051
SecurityMX:COST / Costco Wholesale Corporation
InstitutionCitizens & Northern Corp
Latest Disclosed Ownership4,302 shares
Latest Disclosed Value $ 4,286,642
Citizens & Northern Corp reports 1.62% decrease in ownership of COST / Costco Wholesale Corporation

On April 27, 2026 - Citizens & Northern Corp filed a 13F-HR form disclosing ownership of 4,302 shares of Costco Wholesale Corporation (MX:COST) valued at $4,286,642 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 4,373 shares of Costco Wholesale Corporation. This represents a change in shares of -1.62% 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)
2026-04-27 2026-03-31 13F Costco Wholesale Corp COM 22160K105 4,302 -71 -1.62 4,287 13.66 1.0690
2026-01-28 2025-12-31 13F Costco Wholesale Corp COM 22160K105 4,373 -221 -4.81 3,771 -11.31 0.9344
2025-10-24 2025-09-30 13F Costco Wholesale Corp COM 22160K105 4,594 13 0.28 4,252 -6.22 1.0538
2025-07-30 2025-06-30 13F Costco Wholesale Corp COM 22160K105 4,581 -960 -17.33 4,535 -13.47 1.2137
2025-04-21 2025-03-31 13F Costco Wholesale Corp COM 22160K105 5,541 -32 -0.57 5,241 2.62 1.4776
2025-01-31 2024-12-31 13F Costco Wholesale Corp COM 22160K105 5,573 -29 -0.52 5,106 2.82 1.3988
2024-11-04 2024-09-30 13F Costco Wholesale Corp COM 22160K105 5,602 420 8.10 4,966 12.76 1.4910
2024-07-30 2024-06-30 13F Costco Wholesale Corp COM 22160K105 5,182 -188 -3.50 4,405 11.95 1.3776
2024-05-13 2024-03-31 13F Costco Wholesale Corp COM 22160K105 5,370 -410 -7.09 3,934 3.12 1.3304
2024-02-09 2023-12-31 13F Costco Wholesale Corp COM 22160K105 5,780 -131 -2.22 3,815 14.26 1.3620
2023-11-13 2023-09-30 13F Costco Wholesale Corp COM 22160K105 5,911 -78 -1.30 3,339 3.57 1.3411
2023-08-11 2023-06-30 13F Costco Wholesale Corp COM 22160K105 5,989 -105 -1.72 3,224 6.51 1.2185
2023-05-05 2023-03-31 13F Costco Wholesale Corp COM 22160K105 6,094 11 0.18 3,028 9.04 1.1813
2023-02-14 2022-12-31 13F Costco Wholesale Corp COM 22160K105 6,083 83 1.38 2,777 -2.05 1.1471
2022-11-09 2022-09-30 13F Costco Wholesale Corp COM 22160K105 6,000 8 0.13 2,834 -1.32 1.3280
2022-08-04 2022-06-30 13F Costco Wholesale Corp COM 22160K105 5,992 -6 -0.10 2,872 -16.85 1.2515
2022-05-12 2022-03-31 13F Costco Wholesale Corp COM 22160K105 5,998 -72 -1.19 3,454 0.23 1.2763
2022-01-24 2021-12-31 13F Costco Wholesale Corp COM 22160K105 6,070 -186 -2.97 3,446 22.59 1.2353
2021-11-04 2021-09-30 13F Costco Wholesale Corp COM 22160K105 6,256 -206 -3.19 2,811 9.93 1.0787
2021-08-02 2021-06-30 13F Costco Wholesale Corp COM 22160K105 6,462 -204 -3.06 2,557 8.81 0.9590
2021-05-11 2021-03-31 13F Costco Wholesale Corp COM 22160K105 6,666 1,507 29.21 2,350 20.88 0.9300
2021-02-09 2020-12-31 13F Costco Wholesale Corp COM 22160K105 5,159 7 0.14 1,944 6.29 0.8557
2020-11-13 2020-09-30 13F Costco Wholesale Corp COM 22160K105 5,152 -203 -3.79 1,829 12.62 0.9737
2020-08-07 2020-06-30 13F Costco Wholesale Corp COM 22160K105 5,355 -122 -2.23 1,624 3.97 0.7931
2020-05-08 2020-03-31 13F Costco Wholesale Corp COM 22160K105 5,477 26 0.48 1,562 -2.50 0.9827
2020-02-11 2019-12-31 13F Costco Wholesale Corp COM 22160K105 5,451 -157 -2.80 1,602 -0.87 0.8017
2019-11-12 2019-09-30 13F Costco Wholesale Corp COM 22160K105 5,608 -147 -2.55 1,616 6.25 0.8818
2019-08-14 2019-06-30 13F Costco Wholesale Corp COM 22160K105 5,755 -157 -2.66 1,521 6.22 0.8455
2019-05-13 2019-03-31 13F Costco Wholesale Corp COM 22160K105 5,912 117 2.02 1,432 21.36 0.7987
2019-02-14 2018-12-31 13F Costco Wholesale Corp COM 22160K105 5,795 -88 -1.50 1,180 -14.62 0.8230
2018-11-14 2018-09-30 13F Costco Wholesale Corp COM 22160K105 5,883 -54 -0.91 1,382 11.36 0.9397
2018-08-03 2018-06-30 13F Costco Wholesale Corp COM 22160K105 5,937 -17 -0.29 1,241 10.61 0.8819
2018-05-14 2018-03-31 13F Costco Wholesale Corp COM 22160K105 5,954 -92 -1.52 1,122 -0.27 0.8343
2018-02-13 2017-12-31 13F Costco Wholesale Corp COM 22160K105 6,046 88 1.48 1,125 14.91 0.8001
2017-11-13 2017-09-30 13F Costco Wholesale Corp COM 22160K105 5,958 -339 -5.38 979 -2.78 0.7454
2017-08-11 2017-06-30 13F Costco Wholesale Corp COM 22160K105 6,297 413 7.02 1,007 2.03 0.7921
2017-05-11 2017-03-31 13F Costco Wholesale Corp COM 22160K105 5,884 334 6.02 987 11.02 0.7957
2017-02-13 2016-12-31 13F Costco Wholesale Corp COM 22160K105 5,550 147 2.72 889 7.89 0.6719
2016-11-10 2016-09-30 13F Costco Wholesale Corp COM 22160K105 5,403 -37 -0.68 824 -3.51 0.6459
2016-08-10 2016-06-30 13F Costco Wholesale Corp COM 22160K105 5,440 217 4.15 854 3.77 0.6664
2016-05-13 2016-03-31 13F Costco Wholesale Corp COM 22160K105 5,223 259 5.22 823 2.62 0.6495
2016-02-16 2015-12-31 13F Costco Wholesale Corp COM 22160K105 4,964 -1,987 -28.59 802 -20.20 0.6540
2015-11-13 2015-09-30 13F Costco Wholesale Corp COM 22160K105 6,951 297 4.46 1,005 11.79 0.7857
2015-08-13 2015-06-30 13F Costco Wholesale Corp COM 22160K105 6,654 260 4.07 899 -7.22 0.6962
2015-05-15 2015-03-31 13F Costco Wholesale Corp COM 22160K105 6,394 655 11.41 969 19.04 0.7339
2015-02-12 2014-12-31 13F Costco Wholesale Corp COM 22160K105 5,739 5,739 814 0.6149
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.