Sale
YORKTOWN ENERGY PARTNERS XI, L.P. 10 percent owner 10 percent owner
Class B Common Stock, par value $0.01 per share 974 $16.11 $15,692 Sale
LAWRENCE BRYAN H director director
Class B Common Stock, par value $0.01 per share 974 $16.11 $15,692 Sale
LEIDEL PETER A director director
Class B Common Stock, par value $0.01 per share 974 $16.11 $15,692 Sale
LAWRENCE BRYAN H director director
Class B Common Stock, par value $0.01 per share 644 $16.11 $10,375 Sale
LAWRENCE BRYAN H director director
Class A Common Stock, par value $0.01 per share 15,640 $18.32 $286,478 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. 10 percent owner 10 percent owner
Class A Common Stock, par value $0.01 per share 15,703 $18.32 $287,632 Sale
LAWRENCE BRYAN H director director
Class B Common Stock, par value $0.01 per share 977 $16.11 $15,740 Sale
YORKTOWN IX ASSOCIATES LLC 10 percent owner 10 percent owner
Class B Common Stock, par value $0.01 per share 977 $16.11 $15,740 Sale
LEIDEL PETER A director director
Class A Common Stock, par value $0.01 per share 10,338 $18.32 $189,361 Sale
YORKTOWN ENERGY PARTNERS XI, L.P. 10 percent owner 10 percent owner
Class A Common Stock, par value $0.01 per share 15,640 $18.32 $286,478 Sale
LEIDEL PETER A director director
Class A Common Stock, par value $0.01 per share 15,703 $18.32 $287,632 Sale
LEIDEL PETER A director director
Class B Common Stock, par value $0.01 per share 977 $16.11 $15,740 Sale
YORKTOWN IX ASSOCIATES LLC 10 percent owner 10 percent owner
Class A Common Stock, par value $0.01 per share 15,703 $18.32 $287,632 Sale
LEIDEL PETER A director director
Class B Common Stock, par value $0.01 per share 644 $16.11 $10,375 Sale
YORKTOWN XI ASSOCIATES LLC 10 percent owner 10 percent owner
Class B Common Stock, par value $0.01 per share 974 $16.11 $15,692 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. 10 percent owner 10 percent owner
Class B Common Stock, par value $0.01 per share 977 $16.11 $15,740 Sale
LAWRENCE BRYAN H director director
Class A Common Stock, par value $0.01 per share 15,703 $18.32 $287,632 Sale
GIACOMETTO AURELIA SKIPWITH director director
Common Stock 3,600 $8.96 $32,260 Sale
FRISCHKORN DAVID E K director: director:
Common Stock 5,000 $9.89 $49,450 Option
ATKINS RANDALL WHITTAKER officer: CEO and Chairman officer: CEO and Chairman
Employee Stock Option (right to buy) 20,000 N/A N/A Sale
FRISCHKORN DAVID E K director: director:
Common Stock 5,000 $11.66 $58,300 Sale
LAWRENCE BRYAN H director: director:
Common Stock, par value $0.01 per share 177,295 $13.69 $2,427,700 Sale
YORKTOWN IX ASSOCIATES LLC director: director:
Common Stock, par value $0.01 per share 177,295 $13.69 $2,427,700 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. director: director:
Common Stock, par value $0.01 per share 177,295 $13.69 $2,427,700 Sale
LEIDEL PETER A director: director:
Common Stock, par value $0.01 per share 177,295 $13.69 $2,427,700 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. director: director:
Common Stock, par value $0.01 per share 245,060 $13.61 $3,336,247 Sale
LAWRENCE BRYAN H director: director:
Common Stock, par value $0.01 per share 101,911 $14.47 $1,474,856 Sale
YORKTOWN IX ASSOCIATES LLC director: director:
Common Stock, par value $0.01 per share 145,801 $15.17 $2,211,801 Sale
LEIDEL PETER A director: director:
Common Stock, par value $0.01 per share 145,801 $15.17 $2,211,801 Sale
LAWRENCE BRYAN H director: director:
Common Stock, par value $0.01 per share 78,921 $14.59 $1,151,300 Sale
LEIDEL PETER A director: director:
Common Stock, par value $0.01 per share 78,921 $14.59 $1,151,300 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. director: director:
Common Stock, par value $0.01 per share 196,184 $14.62 $2,867,229 Sale
YORKTOWN IX ASSOCIATES LLC director: director:
Common Stock, par value $0.01 per share 196,184 $14.62 $2,867,229 Sale
LEIDEL PETER A director: director:
Common Stock, par value $0.01 per share 7,438 $14.92 $110,953 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. director: director:
Common Stock, par value $0.01 per share 78,375 $14.22 $1,114,493 Sale
YORKTOWN IX ASSOCIATES LLC director: director:
Common Stock, par value $0.01 per share 7,438 $14.92 $110,953 Sale
LAWRENCE BRYAN H director: director:
Common Stock, par value $0.01 per share 92,848 $14.79 $1,372,758 Sale
LAWRENCE BRYAN H director: director:
Common Stock, par value $0.01 per share 700 $15.25 $10,675 Sale
LEIDEL PETER A director: director:
Common Stock, par value $0.01 per share 700 $15.25 $10,675 Sale
YORKTOWN ENERGY PARTNERS IX, L.P. director: director:
Common Stock, par value $0.01 per share 191,284 $15.23 $2,913,829 Sale
YORKTOWN IX ASSOCIATES LLC director: director:
Common Stock, par value $0.01 per share 222,003 $15.61 $3,466,133 Sale
ATKINS RANDALL WHITTAKER director, officer: Chief Executiv.. director, officer: Chief Execut..
Common Stock 23,148 $15.56 $360,275 Sale
ATKINS RANDALL WHITTAKER director, officer: Chief Executiv.. director, officer: Chief Execut..
Common Stock 34,427 $15.4 $530,210 Purchase
SUSSMAN JEREMY R. officer: Chief Financial Officer officer: Chief Financial Officer
Common Stock 6,250 $4 $25,000 Purchase
BAUERSACHS MICHAEL DALE director, officer: President and CEO director, officer: President an..
Common Stock 14,865 $4.15 $61,734 Purchase
BAUERSACHS MICHAEL DALE director, officer: President and CEO director, officer: President an..
Common Stock 34,512 $1.98 $68,265 Purchase
ATKINS RANDALL WHITTAKER director, officer: Executive Chai.. director, officer: Executive Ch..
Common Stock 10,000 N/A N/A Purchase
GRANEY PATRICK C III director director
Common Stock 46,000 $3.58 $164,450 Purchase
ATKINS RANDALL WHITTAKER director, officer: Executive Chai.. director, officer: Executive Ch..
Common Stock 10,000 $3.74 $37,380 Purchase
CRYDER BRUCE E director director
Common Stock, par value $0.01 per share 3,368 $7.38 $24,859 
