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GENERAL AMERICAN INVESTORS CO INC
> COST
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | 0 | 28,534,140,000 | 4,339,640,000 | $538,380.00 |
| 12/31/2022 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | 0 | 24,194,500,000 | 24,169,470,000 | $456,500.00 |
| 09/30/2022 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | 0 | 25,030,000 | -372,000 | $472.26 |
| 06/30/2022 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | 0 | 25,402,000 | -5,118,000 | $479.28 |
| 03/31/2022 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | 0 | 30,520,000 | 432,000 | $575.85 |
| 12/31/2021 | COSTCO WHOLESALE CORP /NEW | COST | 53,000 | -7,000 | 30,088,000 | 3,127,000 | $567.70 |
| 09/30/2021 | COSTCO WHOLESALE CORP /NEW | COST | 60,000 | -5,000 | 26,961,000 | 1,242,000 | $449.35 |
| 06/30/2021 | COSTCO WHOLESALE CORP /NEW | COST | 65,000 | 0 | 25,719,000 | 2,808,000 | $395.68 |
| 03/31/2021 | COSTCO WHOLESALE CORP /NEW | COST | 65,000 | 0 | 22,911,000 | -1,580,000 | $352.48 |
| 12/31/2020 | COSTCO WHOLESALE CORP /NEW | COST | 65,000 | -5,545 | 24,491,000 | -552,000 | $376.78 |
| 09/30/2020 | COSTCO WHOLESALE CORP /NEW | COST | 70,545 | -9,655 | 25,043,000 | 726,000 | $354.99 |
| 06/30/2020 | COSTCO WHOLESALE CORP /NEW | COST | 80,200 | 0 | 24,317,000 | 1,450,000 | $303.20 |
| 03/31/2020 | COSTCO WHOLESALE CORP /NEW | COST | 80,200 | -5,000 | 22,867,000 | -2,175,000 | $285.12 |
| 12/31/2019 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | 0 | 25,042,000 | 495,000 | $293.92 |
| 09/30/2019 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | 0 | 24,547,000 | 2,032,000 | $288.11 |
| 06/30/2019 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | 0 | 22,515,000 | 1,885,000 | $264.26 |
| 03/31/2019 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | 0 | 20,630,000 | 3,274,000 | $242.14 |
| 12/31/2018 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | 0 | 17,356,000 | -2,656,000 | $203.71 |
| 09/30/2018 | COSTCO WHOLESALE CORP /NEW | COST | 85,200 | -18,581 | 20,012,000 | -1,676,000 | $234.88 |
| 06/30/2018 | COSTCO WHOLESALE CORP /NEW | COST | 103,781 | 0 | 21,688,000 | 2,133,000 | $208.98 |
| 03/31/2018 | COSTCO WHOLESALE CORP /NEW | COST | 103,781 | -15,000 | 19,555,000 | -2,553,000 | $188.43 |
| 12/31/2017 | COSTCO WHOLESALE CORP /NEW | COST | 118,781 | 0 | 22,108,000 | 2,593,000 | $186.12 |
| 09/30/2017 | COSTCO WHOLESALE CORP /NEW | COST | 118,781 | 0 | 19,515,000 | 518,000 | $164.29 |
| 06/30/2017 | COSTCO WHOLESALE CORP /NEW | COST | 118,781 | -50,000 | 18,997,000 | -9,306,000 | $159.93 |
| 03/31/2017 | COSTCO WHOLESALE CORP /NEW | COST | 168,781 | 168,781 | 28,303,000 | 28,303,000 | $167.69 |
| 06/30/2013 | COSTCO WHOLESALE CORP /NEW | COST | 0 | -394,500 | 0 | -41,860,000 | |
| 03/31/2013 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 41,860,000 | 2,911,000 | $106.11 |
| 12/31/2012 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 38,949,000 | -564,000 | $98.73 |
| 09/30/2012 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 39,513,000 | 2,035,000 | $100.16 |
| 06/30/2012 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 37,478,000 | 1,657,000 | $95.00 |
| 03/31/2012 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 35,821,000 | 2,951,000 | $90.80 |
| 12/31/2011 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | 0 | 32,870,000 | 470,000 | $83.32 |
| 09/30/2011 | COSTCO WHOLESALE CORP /NEW | COST | 394,500 | -180,500 | 32,400,000 | -14,313,000 | $82.13 |
| 06/30/2011 | COSTCO WHOLESALE CORP /NEW | COST | 575,000 | 0 | 46,713,000 | 4,554,000 | $81.24 |
| 03/31/2011 | COSTCO WHOLESALE CORP /NEW | COST | 575,000 | 0 | 42,159,000 | 638,000 | $73.32 |
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