Three months ended June 30,

Six months ended June 30,

2019

2018

2019

2018

(in thousands, except per share amounts)

Net income (loss)

$

(15,565)

$

(237,634)

$

(34,095)

$

(253,461)

Net income (loss) per common share:

Basic

$

(0.33)

$

(5.02)

$

(0.72)

$

(5.35)

Diluted

$

(0.33)

$

(5.02)

$

(0.72)

$

(5.35)

Basic weighted average shares outstanding

47,112

47,311

47,145

47,332

Effect of potentially dilutive share-based awards

—

Diluted weighted average shares outstanding

47,112

47,311

47,145

47,332

Common share equivalents excluded from the diluted weighted average shares outstanding since Veeco incurred a net loss and their effect would be antidilutive

498

22

344

23

Potentially dilutive shares excluded from the diluted calculation as their effect would be antidilutive

1,903

2,706

1,933

2,204

Maximum potential shares to be issued for settlement of the Convertible Senior Notes excluded from the diluted calculation as their effect would be antidilutive

8,618