Quarterly report pursuant to Section 13 or 15(d)

Redeemable Convertible Preferred Stock

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Redeemable Convertible Preferred Stock
9 Months Ended
Sep. 30, 2018
Temporary Equity Disclosure [Abstract]  
Redeemable Convertible Preferred Stock Redeemable Convertible Preferred Stock

In June 2017, we entered into an agreement with Sirius XM Radio Inc. ("Sirius XM Radio") to sell 480,000 shares of Series A for $1,000 per share, with gross proceeds of $480.0 million. The Series A shares were issued in two rounds: an initial closing of 172,500 shares for $172.5 million that occurred on June 9, 2017 upon signing the agreement with Sirius XM Radio, and an additional closing of 307,500 shares for $307.5 million that occurred on September 22, 2017. Total proceeds from the initial and additional closing, net of preferred stock issuance costs of $29.3 million, were $450.7 million.

The voting rights, conversion feature, redemption feature, fundamental changes and recognition of the Series A is further described in Note 10 "Redeemable Convertible Preferred Stock" in our Annual Report on Form 10-K for the year ended December 31, 2017.

As of December 31, 2017 and September 30, 2018, redeemable convertible preferred stock consisted of the following:

 
As of December 31,
 
As of September 30,
 
2017
 
2018
 
(in thousands)
 
(in thousands)
Series A redeemable convertible preferred stock
$
480,000

 
$
480,000

Issuance costs
(29,318
)
 
(29,318
)
Accretion of issuance costs
29,318

 
29,318

Stock dividend payable to preferred stockholders
10,849

 
33,270

Redeemable convertible preferred stock
$
490,849

 
$
513,270