We compute net loss per share using the two-class method required for multiple classes of common stock. Our participating securities include any shares issued on the early exercise of stock options subject to repurchase because holders of such shares have non-forfeitable dividend rights in the event a dividend is paid on common stock.

In March 2017, we completed our initial public offering (“IPO”) in which we issued and sold 160.3 million shares of Class A common stock, inclusive of the over-allotment. In addition, on the closing of the IPO, our Chief Executive Officer (“CEO”) received an RSU award (“CEO award”) for 37.4 million shares of Series FP preferred stock, which was fully vested on grant and automatically converted into an equivalent number of shares of Class C common stock on the closing of the IPO. Following the IPO, we have three classes of authorized common stock – Class A common stock, Class B common stock, and Class C common stock.

Basic net loss per share is computed by dividing net loss attributable to each class of stockholders by the weighted-average number of such class of shares of stock outstanding during the period. Vested restricted stock units (“RSUs”) that have not been settled, including the vested CEO award, and restricted stock awards (“RSAs”) for which the risk of forfeiture has lapsed have been included in the appropriate common share class used to calculate basic net loss per share.

For the calculation of diluted net loss per share, net loss per share attributable to common stockholders for basic net loss per share is adjusted by the effect of dilutive securities, including awards under our equity compensation plans. Diluted net loss per share attributable to common stockholders is computed by dividing the resulting net loss attributable to common stockholders by the weighted-average number of fully diluted common shares outstanding. We use the if-converted method for calculating any potential dilutive effect of the Convertible Notes on diluted net loss per share, subject to meeting the criteria for using the treasury stock method in future periods. The Convertible Notes would have a dilutive impact on net income per share when the average market price of Class A common stock for a given period exceeds the conversion price of the Convertible Notes. For the periods presented, our potentially dilutive shares relating to stock options, RSUs, RSAs, Convertible Notes, and common stock subject to repurchase were not included in the computation of diluted net loss per share as the effect of including these shares in the calculation would have been anti-dilutive.

The numerators and denominators of the basic and diluted net loss per share computations for our common stock are calculated as follows for the three and nine months ended September 30, 2019 and 2018:

	Three Months Ended September 30,																		Nine Months Ended September 30,
	2019									2018									2019									2018
	(in thousands, except per share data)
	Class A Common			Class B Common			Class C Common			Class A Common			Class B Common			Class C Common			Class A Common			Class B Common			Class C Common			Class A Common⁽³⁾			Class B Common⁽¹⁾			Class C Common⁽²⁾
Numerator:
Net loss	$	(181,409	)	$	(6,308	)	$	(39,658	)	$	(240,299	)	$	(23,423	)	$	(61,426	)	$	(622,641	)	$	(28,223	)	$	(142,092	)	$	(777,184	)	$	(79,652	)	$	(207,407	)
Net loss attributable to common stockholders	$	(181,409	)	$	(6,308	)	$	(39,658	)	$	(240,299	)	$	(23,423	)	$	(61,426	)	$	(622,641	)	$	(28,223	)	$	(142,092	)	$	(777,184	)	$	(79,652	)	$	(207,407	)
Denominator:
Basic shares:
Weighted-average common shares – Basic		1,111,678			38,658			243,022			968,090			94,364			247,464			1,071,290			48,559			244,478			932,767			95,598			248,928
Diluted shares:
Weighted-average common shares – Diluted		1,111,678			38,658			243,022			968,090			94,364			247,464			1,071,290			48,559			244,478			932,767			95,598			248,928
Net loss per share attributable to common stockholders:
Basic	$	(0.16	)	$	(0.16	)	$	(0.16	)	$	(0.25	)	$	(0.25	)	$	(0.25	)	$	(0.58	)	$	(0.58	)	$	(0.58	)	$	(0.83	)	$	(0.83	)	$	(0.83	)
Diluted	$	(0.16	)	$	(0.16	)	$	(0.16	)	$	(0.25	)	$	(0.25	)	$	(0.25	)	$	(0.58	)	$	(0.58	)	$	(0.58	)	$	(0.83	)	$	(0.83	)	$	(0.83	)

The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: