4. Consolidated Entities
Theravance Respiratory Company, LLC
As of June 30, 2020, and December 31, 2019, $25.6 million and $14.4 million, respectively, of the related party receivables from collaborative arrangements were attributable to TRC. The cash balance attributable to TRC as of June 30, 2020 was $16.5 million. Total revenue for TRC related to TRELEGY® ELLIPTA® was $15.6 million and $9.8 million for the three months ended June 30, 2020 and 2019, respectively, and $31.8 million and $17.2 million for the six months ended June 30, 2020 and 2019, respectively. Total revenue for TRC also included a $10.0 million fee for the termination of the MABA program for the three and six months ended June 30, 2020. Total operating expenses were $0.5 million and $0.8 million for the three and six months ended June 30, 2020, respectively, compared to minimal amounts for the same periods in 2019.
Pulmoquine Therapeutics, Inc.
On April 20, 2020, we entered into a securities purchase agreement with Pulmoquine to purchase 5,808,550 shares of Series A preferred stock for $5.0 million in cash. Upon consummation of the transaction, we owned approximately 90.9% of Pulmoquine's outstanding shares and hold a majority voting interest. Pulmoquine is a biotechnology company focused on the research and development of an aerosolized formulation of hydroxychloroquine to treat respiratory infections, such as the novel coronavirus (“COVID-19”). As of June 30, 2020, total assets including cash balance attributable to Pulmoquine was $4.9 million. Pulmoquine does not currently generate revenue. Total operating expense was $0.6 million for the three and six months ended June 30, 2020.
5. Financial Instruments and Fair Value Measurements
Equity Investment in Armata
On January 27, 2020, we entered into a securities purchase agreement to acquire 8,710,800 shares of Armata’s common stock and warrants to purchase up to 8,710,800 additional shares of its common stock for $25.0 million in cash. Armata is a clinical stage biotechnology company focused on precisely targeted bacteriophage therapeutics for antibiotic-resistant infections. The investment is to support Armata’s ongoing advancement of its bacteriophage development programs including the expected first in human studies related to Armata's lead phage candidate, AP-PA02, targeting Pseudomonas aeruginosa, as well as AP-SA02, its phage candidate targeting Staphylococcus Aureus.
The investment was closed in 2 tranches on February 12, 2020 and March 27, 2020. NaN of our board members joined Armata’s board. After the second closing, we owned approximately 46.7% of Armata’s common stock.
The investment provides Innoviva the ability to have significant influence, but not control over Armata’s operations. Based on our evaluation, we determined that Armata is a VIE, but Innoviva is not the primary beneficiary of the VIE. We elected the fair value option to account for both Armata’s common stock and warrants at fair value. The fair value of Armata’s common stock is measured based on its closing market price. The warrants have an exercise price of $2.87 per share, are exercisable immediately within five years from the issuance date of the warrants, and include a cashless exercise option. We use the Black-Scholes-Merton pricing model to estimate the fair value of these warrants with the following input assumptions: Armata’s closing market price on the valuation date, the risk-free interest rate computed based on the U.S. Treasury yield, the remaining contractual term as the expected term, and the expected stock price volatility calculated based on the historical volatility of the common stock of Armata’s peer companies.
As of June 30, 2020, the fair values of Armata’s common stock and warrants were estimated at $34.1 million and $26.2 million, respectively. The total fair value of both financial instruments in the amount of $60.3 million was recorded as equity investments on the consolidated balance sheets as of June 30, 2020. We recorded $13.4 million and $35.3 million of unrealized gains and fair value changes in Armata’s investments as changes in fair values of equity investments, net on the consolidated statements of income for the three and six months ended June 30, 2020, respectively.