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GAMCO INVESTORS, INC. ET AL
> ROCK
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | GIBRALTAR INDUSTRIES, INC. | ROCK | 91,920 | 7,000 | 5,783,606,000 | 1,664,986,000 | $62,920.00 |
| 03/31/2023 | GIBRALTAR INDUSTRIES, INC. | ROCK | 84,920 | 1,500 | 4,118,620,000 | 291,310,000 | $48,500.00 |
| 12/31/2022 | GIBRALTAR INDUSTRIES, INC. | ROCK | 83,420 | -1,230 | 3,827,310,000 | 3,823,845,000 | $45,880.00 |
| 09/30/2022 | GIBRALTAR INDUSTRIES, INC. | ROCK | 84,650 | 7,850 | 3,465,000 | 489,000 | $40.93 |
| 06/30/2022 | GIBRALTAR INDUSTRIES, INC. | ROCK | 76,800 | 8,500 | 2,976,000 | 43,000 | $38.75 |
| 03/31/2022 | GIBRALTAR INDUSTRIES, INC. | ROCK | 68,300 | 18,000 | 2,933,000 | -570,000 | $42.94 |
| 09/30/2021 | GIBRALTAR INDUSTRIES, INC. | ROCK | 50,300 | 1,600 | 3,503,000 | -213,000 | $69.64 |
| 06/30/2021 | GIBRALTAR INDUSTRIES, INC. | ROCK | 48,700 | 1,600 | 3,716,000 | -594,000 | $76.30 |
| 03/31/2021 | GIBRALTAR INDUSTRIES, INC. | ROCK | 47,100 | -2,800 | 4,310,000 | 720,000 | $91.51 |
| 12/31/2020 | GIBRALTAR INDUSTRIES, INC. | ROCK | 49,900 | 0 | 3,590,000 | 340,000 | $71.94 |
| 09/30/2020 | GIBRALTAR INDUSTRIES, INC. | ROCK | 49,900 | -1,800 | 3,250,000 | 768,000 | $65.13 |
| 06/30/2020 | GIBRALTAR INDUSTRIES, INC. | ROCK | 51,700 | 51,700 | 2,482,000 | 2,482,000 | $48.01 |
| 12/31/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 0 | -6,900 | 0 | -315,000 | |
| 09/30/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 6,900 | -10,300 | 315,000 | -330,000 | $45.65 |
| 06/30/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 17,200 | 0 | 645,000 | 63,000 | $37.50 |
| 03/31/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 17,200 | -15,800 | 582,000 | -507,000 | $33.84 |
| 12/31/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 33,000 | 18,000 | 1,089,000 | 622,000 | $33.00 |
| 09/30/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 15,000 | 6,000 | 467,000 | 146,000 | $31.13 |
| 06/30/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 9,000 | -2,000 | 321,000 | -132,000 | $35.67 |
| 03/31/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 11,000 | 0 | 453,000 | -5,000 | $41.18 |
| 12/31/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 11,000 | -2,600 | 458,000 | -47,000 | $41.64 |
| 09/30/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 13,600 | -700 | 505,000 | 96,000 | $37.13 |
| 06/30/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 12,500 | -1,800 | 395,000 | -14,000 | $31.60 |
| 03/31/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 14,300 | 14,300 | 409,000 | 409,000 | $28.60 |
| 12/31/2015 | GIBRALTAR INDUSTRIES, INC. | ROCK | 7,900 | 7,900 | 201,000 | 201,000 | $25.44 |
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