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| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2020 | GIBRALTAR INDUSTRIES, INC. | ROCK | 0 | -217,340 | 0 | -10,963,000 | |
| 12/31/2019 | GIBRALTAR INDUSTRIES, INC. | ROCK | 217,340 | -587,703 | 10,963,000 | -26,021,000 | $50.44 |
| 09/30/2019 | GIBRALTAR INDUSTRIES, INC. | ROCK | 805,043 | -226,517 | 36,984,000 | -4,650,000 | $45.94 |
| 06/30/2019 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,031,560 | -32,588 | 41,634,000 | -1,581,000 | $40.36 |
| 03/31/2019 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,064,148 | -167,216 | 43,215,000 | -609,000 | $40.61 |
| 12/31/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,231,364 | 136,035 | 43,824,000 | -6,123,000 | $35.59 |
| 09/30/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,095,329 | -474,564 | 49,947,000 | -8,924,000 | $45.60 |
| 06/30/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,569,893 | 38,786 | 58,871,000 | 7,043,000 | $37.50 |
| 03/31/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,531,107 | -232,953 | 51,828,000 | -6,386,000 | $33.85 |
| 01/31/2018 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,563,092 | -289,746 | 57,990,713 | 274,713 | $37.10 |
| 12/31/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,764,060 | -88,778 | 58,214,000 | 498,000 | $33.00 |
| 09/30/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,852,838 | 1,059,175 | 57,716,000 | 29,422,000 | $31.15 |
| 06/30/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 793,663 | 793,663 | 28,294,000 | 28,294,000 | $35.65 |
| 03/31/2017 | GIBRALTAR INDUSTRIES, INC. | ROCK | 0 | -10,240 | 0 | -426,000 | |
| 12/31/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 10,240 | -556,837 | 426,000 | -20,641,000 | $41.60 |
| 09/30/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 567,077 | -558,712 | 21,067,000 | -14,474,000 | $37.15 |
| 06/30/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,125,789 | -282,991 | 35,541,000 | -4,750,000 | $31.57 |
| 03/31/2016 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,408,780 | 1,408,780 | 40,291,000 | 40,291,000 | $28.60 |
| 12/31/2015 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,467,986 | 1,467,986 | 37,346,000 | 37,346,000 | $25.44 |
| 09/30/2015 | GIBRALTAR INDUSTRIES, INC. | ROCK | 2,105,009 | -84,645 | 38,627,000 | -5,976,000 | $18.35 |
| 06/30/2015 | GIBRALTAR INDUSTRIES, INC. | ROCK | 2,189,654 | 342,081 | 44,603,000 | 14,284,000 | $20.37 |
| 03/31/2015 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,847,573 | -10,222 | 30,319,000 | 111,000 | $16.41 |
| 12/31/2014 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,857,795 | 182,164 | 30,208,000 | 7,269,000 | $16.26 |
| 09/30/2014 | GIBRALTAR INDUSTRIES, INC. | ROCK | 1,675,631 | 782,637 | 22,939,000 | 9,089,000 | $13.69 |
| 06/30/2014 | GIBRALTAR INDUSTRIES, INC. | ROCK | 892,994 | 892,994 | 13,850,000 | 13,850,000 | $15.51 |
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