Three Months Ended September 30,

Nine Months Ended September 30,

2012

2011

2012

2011

Numerator

Numerator for basic loss per common share - loss from continuing operations

$

(12,745

)

$

(16,910

)

$

(53,310

)

$

(18,528

)

Net income attributable to the noncontrolling interests

(1,121

)

(2,056

)

(4,428

)

(6,537

)

Loss attributable to MDC Partners Inc. common shareholders from continuing operations

(13,866

)

(18,966

)

(57,738

)

(25,065

)

Effect of dilutive securities

—

Numerator for diluted loss per common share – loss attributable to MDC Partners Inc. common shareholders from continuing operations

$

(13,866

)

$

(18,966

)

$

(57,738

)

$

(25,065

)

Denominator

Denominator for basic loss per common share – adjusted weighted shares

31,051,561

29,158,703

30,606,146

29,051,450

Effect of dilutive securities

—

Denominator for diluted loss per common share - adjusted weighted shares

31,051,561

29,158,703

30,606,146

29,051,450

Basic loss per common share from continuing operations attributable to MDC Partners Inc.

$

(0.45

)

$

(0.65

)

$

(1.89

)

$

(0.86

)

Diluted loss per common share from continuing operations attributable to MDC Partners Inc.

$

(0.45

)

$

(0.65

)

$

(1.89

)

$

(0.86

)