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| 24 May 2023 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1 | $25.71 | $26 24 May 2023 | 42,399 | ↗ |
| 6 May 2022 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 5,000 | $26.00 | $130,000 6 May 2022 | 98,645 | ↗ |
| 9 Oct 2020 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 7,500 | $27.66 | $207,450 9 Oct 2020 | 85,660 | ↗ |
| 24 Jan 2020 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 40 | $27.94 | $1,118 24 Jan 2020 | 93,160 | ↗ |
| 5 Sep 2019 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $26.82 | $10,728 5 Sep 2019 | 93,200 | ↗ |
| 23 Apr 2018 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,400 | $33.96 | $47,544 23 Apr 2018 | 70,370 | ↗ |
| 20 Apr 2018 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,011 | $33.85 | $34,222 20 Apr 2018 | 71,770 | ↗ |
| 18 Apr 2018 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,100 | $34.25 | $140,425 18 Apr 2018 | 72,781 | ↗ |
| 20 Dec 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 1,300 | $34.13 | $44,369 20 Dec 2017 | 1,065,344 | ↗ |
| 15 Dec 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 5,800 | $34.14 | $198,012 15 Dec 2017 | 1,064,044 | ↗ |
| 14 Dec 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 1,800 | $33.70 | $60,660 14 Dec 2017 | 1,058,244 | ↗ |
| 13 Dec 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 400 | $33.83 | $13,532 13 Dec 2017 | 1,056,444 | ↗ |
| 5 Apr 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 8,700 | $33.53 | $291,711 5 Apr 2017 | 76,881 | ↗ |
| 3 Apr 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,292 | $33.44 | $143,524 3 Apr 2017 | 85,581 | ↗ |
| 30 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 33,523 | $33.50 | $1,123,021 30 Mar 2017 | 89,873 | ↗ |
| 28 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,588 | $33.60 | $120,557 28 Mar 2017 | 123,396 | ↗ |
| 27 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,455 | $33.20 | $81,506 27 Mar 2017 | 126,984 | ↗ |
| 17 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,300 | $33.60 | $77,280 17 Mar 2017 | 129,439 | ↗ |
| 15 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 9,450 | $33.48 | $316,386 15 Mar 2017 | 131,739 | ↗ |
| 13 Mar 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,000 | $33.37 | $200,220 13 Mar 2017 | 141,189 | ↗ |
| 2 Feb 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $32.50 | $13,000 2 Feb 2017 | 147,189 | ↗ |
| 2 Feb 2017 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $32.50 | $13,000 2 Feb 2017 | 147,189 | ↗ |
| 9 Dec 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 11,113 | $25.97 | $288,605 9 Dec 2016 | 93,645 | ↗ |
| 21 Nov 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 377 | $25.97 | $9,791 21 Nov 2016 | 82,532 | ↗ |
| 26 Oct 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,000 | $31.77 | $63,540 26 Oct 2016 | 147,589 | ↗ |
| 24 Oct 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,000 | $31.90 | $191,400 24 Oct 2016 | 149,589 | ↗ |
| 10 Oct 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 10,619 | $32.59 | $346,073 10 Oct 2016 | 155,589 | ↗ |
| 22 Sep 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,300 | $32.90 | $207,270 22 Sep 2016 | 166,208 | ↗ |
| 16 Sep 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,900 | $32.30 | $61,370 16 Sep 2016 | 172,508 | ↗ |
| 2 Sep 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 4,951 | $26.85 | $132,934 2 Sep 2016 | 82,155 | ↗ |
| 18 Aug 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 20,000 | $33.02 | $660,400 18 Aug 2016 | 174,408 | ↗ |
| 22 Jun 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 25,600 | $31.26 | $800,256 22 Jun 2016 | 194,408 | ↗ |
| 13 Jun 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,200 | $31.11 | $99,552 13 Jun 2016 | 220,008 | ↗ |
| 24 May 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 14,600 | $30.83 | $450,118 24 May 2016 | 223,208 | ↗ |
| 16 May 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $30.65 | $12,260 16 May 2016 | 237,808 | ↗ |
| 27 Apr 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 9,360 | $31.86 | $298,210 27 Apr 2016 | 238,208 | ↗ |
| 26 Apr 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 8,840 | $31.75 | $280,670 26 Apr 2016 | 247,568 | ↗ |
| 22 Apr 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $31.76 | $12,704 22 Apr 2016 | 256,408 | ↗ |
| 18 Apr 2016 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,000 | $31.59 | $126,360 18 Apr 2016 | 256,808 | ↗ |
| 2 Sep 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 11,200 | $26.19 | $293,328 2 Sep 2015 | 77,204 | ↗ |
| 25 Aug 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 16,481 | $31.25 | $515,031 25 Aug 2015 | 927,042 | ↗ |
| 21 Aug 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 4,218 | $32.65 | $137,718 21 Aug 2015 | 910,561 | ↗ |
| 28 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,600 | $34.12 | $225,192 28 Jul 2015 | 260,808 | ↗ |
| 15 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,000 | $34.96 | $209,760 15 Jul 2015 | 267,408 | ↗ |
| 13 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 28,668 | $34.85 | $999,080 13 Jul 2015 | 273,408 | ↗ |
| 9 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 14,426 | $34.44 | $496,831 9 Jul 2015 | 302,076 | ↗ |
| 7 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,574 | $34.76 | $54,712 7 Jul 2015 | 316,502 | ↗ |
| 6 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 430 | $34.55 | $14,857 6 Jul 2015 | 318,076 | ↗ |
| 2 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 9,000 | $34.70 | $312,300 2 Jul 2015 | 318,506 | ↗ |
| 1 Jul 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,000 | $34.88 | $34,880 1 Jul 2015 | 327,506 | ↗ |
| 22 May 2015 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,000 | $35.92 | $107,760 22 May 2015 | 328,506 | ↗ |
| 24 Sep 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,000 | $37.46 | $74,920 24 Sep 2014 | 336,506 | ↗ |
| 17 Sep 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,000 | $37.82 | $113,460 17 Sep 2014 | 338,506 | ↗ |
| 9 Sep 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 328 | $37.83 | $12,408 9 Sep 2014 | 341,506 | ↗ |
| 8 Sep 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,672 | $37.97 | $101,456 8 Sep 2014 | 341,834 | ↗ |
| 25 Aug 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,000 | $38.10 | $114,300 25 Aug 2014 | 344,506 | ↗ |
| 5 Aug 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,000 | $36.44 | $218,640 5 Aug 2014 | 347,506 | ↗ |
| 30 Jun 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,000 | $36.81 | $36,810 30 Jun 2014 | 360,406 | ↗ |
| 29 May 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,000 | $35.64 | $106,920 29 May 2014 | 361,406 | ↗ |
| 19 May 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,000 | $35.39 | $141,560 19 May 2014 | 364,406 | ↗ |
| 14 May 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,199 | $35.71 | $42,816 14 May 2014 | 368,406 | ↗ |
| 2 May 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,414 | $35.58 | $121,470 2 May 2014 | 369,605 | ↗ |
| 25 Apr 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,000 | $35.28 | $70,560 25 Apr 2014 | 373,019 | ↗ |
| 7 Mar 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 21,707 | $35.07 | $761,264 7 Mar 2014 | 375,019 | ↗ |
| 5 Mar 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 68,941 | $35.12 | $2,421,208 5 Mar 2014 | 396,726 | ↗ |
| 3 Mar 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,961 | $34.98 | $138,556 3 Mar 2014 | 465,667 | ↗ |
| 28 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 2,769 | $34.77 | $96,278 28 Feb 2014 | 469,628 | ↗ |
| 24 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 400 | $34.52 | $13,808 24 Feb 2014 | 472,397 | ↗ |
| 20 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 14,432 | $34.31 | $495,162 20 Feb 2014 | 472,797 | ↗ |
| 14 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,250 | $34.33 | $42,913 14 Feb 2014 | 487,229 | ↗ |
| 7 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 15,366 | $33.12 | $508,922 7 Feb 2014 | 483,781 | ↗ |
| 5 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,945 | $32.79 | $129,357 5 Feb 2014 | 499,147 | ↗ |
| 3 Feb 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,666 | $32.60 | $217,312 3 Feb 2014 | 503,092 | ↗ |
| 31 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 889 | $33.56 | $29,835 31 Jan 2014 | 509,758 | ↗ |
| 29 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,200 | $33.31 | $39,972 29 Jan 2014 | 510,647 | ↗ |
| 15 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,600 | $34.55 | $55,280 15 Jan 2014 | 511,847 | ↗ |
| 14 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 1,388 | $34.50 | $47,886 14 Jan 2014 | 513,447 | ↗ |
| 13 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 12 | $34.43 | $413 13 Jan 2014 | 514,835 | ↗ |
| 7 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,000 | $34.50 | $207,000 7 Jan 2014 | 514,847 | ↗ |
| 2 Jan 2014 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,000 | $34.79 | $139,160 2 Jan 2014 | 520,847 | ↗ |
| 11 Dec 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 9,900 | $33.89 | $335,511 11 Dec 2013 | 524,847 | ↗ |
| 31 Oct 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 21,500 | $35.43 | $761,745 31 Oct 2013 | 534,747 | ↗ |
| 21 Oct 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 15,000 | $35.09 | $526,350 21 Oct 2013 | 556,247 | ↗ |
| 11 Sep 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 15,000 | $33.88 | $508,200 11 Sep 2013 | 571,247 | ↗ |
| 4 Sep 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 50,074 | $25.34 | $1,268,875 4 Sep 2013 | 66,004 | ↗ |
| 6 Mar 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 4,600 | $25.63 | $117,898 6 Mar 2013 | 15,930 | ↗ |
| 5 Mar 2013 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 9,589 | $25.56 | $245,095 5 Mar 2013 | 1,000 | ↗ |
| 26 Oct 2011 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 5,000 | $25.35 | $126,750 26 Oct 2011 | 82,400 | ↗ |
| 10 Jul 2010 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 6,900 | $36.78 | $253,782 10 Jul 2010 | 353,506 | ↗ |
| 9 May 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 4,200 | $24.80 | $104,160 9 May 2005 | 98,200 | ↗ |
| 5 May 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 600 | $24.65 | $14,790 5 May 2005 | 102,400 | ↗ |
| 4 May 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 5,000 | $24.59 | $122,950 4 May 2005 | 103,000 | ↗ |
| 3 Mar 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 5,000 | $31.15 | $155,750 3 Mar 2005 | 464,724 | ↗ |
| 2 Mar 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 10,000 | $31.17 | $311,700 2 Mar 2005 | 459,724 | ↗ |
| 1 Mar 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 36,800 | $25.00 | $920,000 1 Mar 2005 | 0 | ↗ |
| 25 Feb 2005 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 3,200 | $25.00 | $80,000 25 Feb 2005 | 36,800 | ↗ |
| 4 May 2004 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Sale | 8 | $30.29 | $242 4 May 2004 | 433,242 | ↗ |
| 24 Sep 2003 | GAMGeneral American Investors Co., Inc. | Spencer Davidson Director | Buy | 148,000 | $25.00 | $3,700,000 24 Sep 2003 | 108,000 | ↗ |