13G Filing: Cormorant Asset Management and Ignyta Inc. (RXDX)

(a)

[ ]

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

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Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

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Insurance Company as defined in Section 3(a)(19) of the Act

(d)

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Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)

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An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

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An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

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A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

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A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

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A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

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A non-U.S. institution in accordance with §240.13d–1(b)(1)(ii)(J);

(k)

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Group, in accordance with §240.13d-1(b)(1)(ii)(K).

(a)

Amount Beneficially Owned***

Cormorant Global Healthcare Master Fund, LP – 2,489,380 shares
Cormorant Global Healthcare GP, LLC – 2,489,380 shares
Cormorant Asset Management, LLC – 3,000,000 shares

Bihua Chen – 3,000,000 shares

(b)

Percent of Class

Cormorant Global Healthcare Master Fund, LP – 4.4%
Cormorant Global Healthcare GP, LLC – 4.4%

Cormorant Asset Management, LLC – 5.3%
Bihua Chen – 5.3%

(c)

Number of shares as to which such person has:

(i)

sole power to vote or to direct the vote