During the first quarter of 2020, Innoviva acquired 8,710,800 shares of common stock and an equal number of warrants of Armata Pharmaceuticals, Inc. (“Armata”) for $25.0 million in cash. Armata is a clinical stage biotechnology company focused on precisely targeted bacteriophage therapeutics for antibiotic-resistant infections.

On January 26, 2021, Innoviva Strategic Opportunities LLC (“ISO”), our wholly owned subsidiary, entered into a securities purchase agreement with Armata to acquire 6,153,847 shares of Armata common stock and warrants to purchase 6,153,847 additional shares of Armata common stock for approximately $20.0 million. The investment was closed in two tranches on January 26, 2021 and March 17, 2021. The investments support Armata’s ongoing advancement of its bacteriophage development programs. The additional investment in the first quarter of 2021 increased Innoviva and ISO’s combined ownership to 59.6% as of March 31, 2021. Armata entered into a voting agreement with the Company and ISO, pursuant to which the Company and ISO agreed not to vote or take any action by written consent with respect to any common shares held by the Company and ISO that represent, in the aggregate, more than

49.5% of the total number of shares of Armata’s common stock issued and outstanding as of the record date for voting on the matters related to election or removal of Armata’s board members. Currently, three of the seven members of Armata’s board of directors are also members of the board of directors of Innoviva. As of June 30, 2021 and December 31, 2020, we owned approximately 59.5% and 46.6%, respectively, of Armata’s common stock.

The investment in Armata provides Innoviva and ISO 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 and ISO are not the primary beneficiary of the VIE. We continue to elect the fair value option to account for both Armata’s common stock and warrants. The fair value of Armata’s common stock is measured based on its closing market price. The warrants purchased in 2020 and 2021 have an exercise price of $2.87 and $3.25 per share, respectively, 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 and its peer companies.

As of June 30, 2021, the fair values of Armata’s common stock and warrants were estimated at $59.0 million and $41.9 million, respectively. As of December 31, 2020, the fair values of Armata’s common stock and warrants were estimated at $26.0 million and $18.0 million, respectively. The total fair value of both financial instruments in the amount of $100.9 million and $44.0 million was recorded as equity and long-term investments on the consolidated balance sheets as of June 30, 2021 and December 31, 2020, respectively. During the three and six months ended June 30, 2021, we recorded $24.3 million unrealized loss and $36.9 million unrealized gains, respectively, as changes in fair values of equity and long-term investments, net on the consolidated statements of income. We recorded $13.4 million and $35.3 million of unrealized gains for the three and six months ended June 30, 2020, respectively.

During the second quarter of 2020, we purchased 14,000,000 shares of common stock as well as warrants to purchase 14,000,000 additional shares of common stock of Entasis Therapeutics, Inc. (“Entasis”) for approximately $35.0 million in cash. Entasis is a clinical-stage biotechnology company focused on the discovery and development of novel antibacterial products.

During the third quarter of 2020, we purchased 4,672,897 shares of Entasis common stock as well as warrants to purchase 4,672,897 additional shares of its common stock for approximately $12.5 million in cash. Innoviva has a right to designate two members to Entasis’ board. As of June 30, 2021 and the date hereof, no Innoviva designees are serving on Entasis’ six-member board.

On May 3, 2021, ISO entered into a securities purchase agreement with Entasis to acquire 10,000,000 shares of Entasis common stock and warrants to purchase 10,000,000 additional shares of Entasis common stock for approximately $20.0 million. The investment was closed in two tranches on May 3, 2021 and June 11, 2021. This investment supports the continued development of Entasis’ novel pipeline of pathogen-targeted antibacterial product candidates. The additional investment increased Innoviva and ISO’s combined ownership, such that as of June 30,2021, we owned approximately 60.6% of Entasis’ common stock. As of December 31, 2020, we owned approximately 51.0% of Entasis’ common stock.

The investment in Entasis provides Innoviva the ability to have significant influence, but not control over Entasis’ operations. Based on our evaluation, we determined that Entasis is a VIE, but Innoviva is not the primary beneficiary of the VIE. We elected the fair value option to account for both Entasis’s common stock and warrants at fair value. The fair value of Entasis’ common stock is measured based on its closing market price at each balance sheet date. The warrants have an exercise price of $2.50 per share and $2.675 per share for those warrants acquired in the second and third quarter of 2020, respectively. The warrants acquired in the second quarter of 2021 have an exercise price of $2.00 per share. All of the warrants 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.

As of June 30, 2021, the fair values of Entasis’s common stock and warrants were estimated at $76.6 million and $54.7 million, respectively. As of December 31, 2020, the fair values of Entasis’s common stock and warrants were estimated at $46.1 million and $31.9 million, respectively. The total fair value of both financial instruments in the amount of $131.3 million and $78.0 million was recorded as equity and long-term investments on the consolidated balance sheets as of June 30, 2021 and December 31, 2020, respectively. We recorded $44.7 million and $33.2 million unrealized gains as changes in fair values of equity and long-term

investments, net on the consolidated statements of income, for the three and six months ended June 30, 2021, respectively. We recorded $33.3 million of unrealized gains for the three and six months ended June 30, 2020.

In October, 2020, TRC purchased 20,469,432 shares of Series C preferred stock and warrants to purchase 5,117,358 additional shares of Series C preferred stock of InCarda Therapeutics, Inc. (“InCarda”) for $15.0 million. $0.8 million was incurred for investment due diligence costs and recorded as part of the equity investment on the consolidated balance sheets. InCarda is a privately held biopharmaceutical company focused on developing inhaled therapies for cardiovascular diseases. As of June 30, 2021 and as of the date hereof, one of InCarda’s eight board members is designated by TRC. As of June 30, 2021 and December 31, 2020, TRC held 13.0% and 13.4%, respectively, of InCarda’s outstanding equity.

The investment in InCarda does not provide TRC the ability to control or have significant influence over InCarda’s operations. Based on our evaluation, we determined that InCarda is a VIE, but TRC is not the primary beneficiary of the VIE. We account for our investment in the Series C preferred shares in InCarda using the measurement alternative. Under the measurement alternative, the equity investment is initially recorded at its allocated cost, but the carrying value may be adjusted through earnings upon an impairment or when there is an observable price change involving the same or a similar investment with the same issuer. As of June 30, 2021 and December 31, 2020, we recorded $15.8 million from our investment in InCarda’s Series C preferred stock as equity and long-term investments on the consolidated balance sheets. There was no impairment or other change to the value of InCarda’s Series C preferred stock as of June 30, 2021 and December 31, 2020.

The warrants are recorded at fair value and subject to remeasurement at each balance sheet date. The warrants are exercisable immediately with an exercise price of $0.7328 per share and expire on October 6, 2021, one year from the issuance date. We use the Black-Scholes-Merton pricing model to estimate the fair value of the warrants with the following input assumptions: the exercise price of the warrants, 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 its peer companies. As of June 30, 2021 and December 31, 2020, the fair value of InCarda’s warrants was estimated at $0.4 million and $1.1 million, respectively, and recorded as equity and long-term investments on the consolidated balance sheets. During the three and six months ended June 30, 2021, we recorded $0.3 million and $0.7 million, respectively, of unrealized loss from fair value changes in our investment in InCarda’s warrants as changes in fair values of equity and long-term investments, net on the consolidated statements of income.

On March 18, 2021, TRC entered into a securities purchase agreement with ImaginAb, Inc. to purchase 4,051,724 shares of ImaginAb Series C preferred stock for $4.7 million. On the same day, TRC also entered into a securities purchase agreement with one of ImaginAb’s common stockholders to purchase 4,097,157 shares of ImaginAb common stock for $1.3 million. ImaginAb is a privately held biotechnology company focused on clinically managing cancer and autoimmune diseases via molecular imaging. $0.4 million was incurred for investment due diligence costs and execution and recorded as part of the equity investment on the consolidated balance sheets. As of the date hereof, one of ImaginAb’s five board members is designated by TRC. As of June 30, 2021, TRC held 12.5% of ImaginAb equity ownership.

The investment in ImaginAb does not provide TRC the ability to control or have significant influence over ImaginAb’s operations. Based on our evaluation, we determined that ImaginAb is a VIE, but TRC is not the primary beneficiary of the VIE. Because ImaginAb’s equity securities are not publicly traded and do not have a readily determinable fair value, we have accounted for our investment in ImaginAb’s Series C preferred stock and common stock using the measurement alternative. Under the measurement alternative, the equity investment is initially recorded at its allocated cost, but the carrying value may be adjusted through earnings upon an impairment or when there is an observable price change involving the same or a similar investment with the same issuer. As of June 30, 2021, $6.4 million was recorded as equity and long-term investments on the consolidated balance sheets. There was no change to the value of our investment in ImaginAB’s equity securities as of June 30, 2021.

The estimated fair value of available-for-sale securities is based on quoted market prices for these or similar investments that were based on prices obtained from a commercial pricing service. Available-for-sale securities are summarized below:

(1)	Money market funds were included in cash and cash equivalents on the consolidated balance sheets.


	December 31, 2020
			Gross		Gross
			Unrealized		Unrealized		Estimated
(In thousands)	Amortized Cost		Gains		Losses		Fair Value
Money market funds ⁽¹⁾	$	204,808	$	—	$	—	$	204,808
Total	$	204,808	$	—	$	—	$	204,808

(1)	Money market funds were included in cash and cash equivalents on the consolidated balance sheets.

There was no credit loss to our available-for-sale securities as of June 30, 2021 and December 31, 2020.

Fair Value Measurements

Our available-for-sale securities and equity investments are measured at fair value on a recurring basis and our debt is carried at amortized cost basis. The estimated fair values were as follows:


	Estimated Fair Value Measurements as of June 30, 2021 Using:
	Quoted Price in Active		Significant Other		Significant
	Markets for		Observable		Unobservable
Types of Instruments	Identical Assets		Inputs		Inputs
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	2,843	$	—	$	—	$	2,843
Investments held by ISP Fund LP ⁽¹⁾		218,978		—		—		218,978
Equity investment - Armata Common Stock		59,013		—		—		59,013
Equity investment - Armata Warrants		—		41,874		—		41,874
Equity investment - Entasis Common Stock		76,557		—		—		76,557
Equity investment - Entasis Warrants		—		54,660		—		54,660
Equity investment - InCarda Warrants		—		—		410		410
Total assets measured at estimated fair value	$	357,391	$	96,534	$	410	$	454,335
Debt
2023 Notes	$	—	$	246,298	$	—	$	246,298
2025 Notes		—		210,185		—		210,185
Total fair value of debt	$	—	$	456,483	$	—	$	456,483

(1)	The investments held by ISP Fund LP consisted of equity investments and money market funds are subject to a 36-month lock-up period from our initial contribution date, December 11, 2020.


	Estimated Fair Value Measurements as of December 31, 2020 Using:
	Quoted Price
	in Active		Significant
	Markets for		Other		Significant
	Identical		Observable		Unobservable
Types of Instruments	Assets		Inputs		Inputs
(In thousands)	Level 1		Level 2		Level 3		Total
Assets
Money market funds	$	204,808	$	—	$	—	$	204,808
Investments held by ISP Fund LP ⁽¹⁾		299,288		—		—		299,288
Equity investment - Armata Common Stock		25,958		—		—		25,958
Equity investment - Armata Warrants		—		18,049		—		18,049
Equity investment - Entasis Common Stock		46,122		—		—		46,122
Equity investment - Entasis Warrants		—		31,882		—		31,882
Equity investment - InCarda Warrants		—		—		1,147		1,147
Total assets measured at estimated fair value	$	576,176	$	49,931	$	1,147	$	627,254
Debt
2023 Notes	$	—	$	239,779	$	—	$	239,779
2025 Notes		—		206,135		—		206,135
Total fair value of debt	$	—	$	445,914	$	—	$	445,914

(1)	The investments held by ISP Fund LP consisted of equity investments and money market funds are subject to a 36-month lock-up period from our initial contribution date, December 11, 2020.

The fair values of our equity investments in Armata and Entasis’s common stock and those investments held by ISP Fund LP are based on the quoted prices in active markets and are classified as Level 1 financial instruments. The fair values of the warrants of Armata and Entasis classified within Level 2 are based upon observable inputs that may include benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications.

InCarda’s warrants are classified as Level 3 financial instruments as InCarda’s securities are not publicly traded and the assumptions used in the valuation model for valuing the warrants are based on significant unobservable and observable inputs including those of publicly traded peer companies.

The fair values of our 2023 Notes and our 2025 Notes are based on recent trading prices of the respective instruments.