SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
RA CAPITAL MANAGEMENT, LLC

(Last) (First) (Middle)
20 PARK PLAZA, SUITE 1200

(Street)
BOSTON MA 02116

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Eidos Therapeutics, Inc. [ EIDX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
06/22/2018
4. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 06/22/2018 C 1,103,847 A (1) 1,103,847(2) I See footnote(3)(4)
Common Stock 06/22/2018 P 1,058,824(5) A $17 2,162,671(6) I See footnote(3)(4)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series B Convertible Preferred Stock (1) 06/22/2018 C 922,950(7) (1) (1) Common Stock 1,103,847 $0 0 I See footnote(3)(4)
1. Name and Address of Reporting Person*
RA CAPITAL MANAGEMENT, LLC

(Last) (First) (Middle)
20 PARK PLAZA, SUITE 1200

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
RA Capital Healthcare Fund LP

(Last) (First) (Middle)
C/O RA CAPITAL MANAGEMENT, LLC
20 PARK PLAZA, SUITE 1200

(Street)
BOSTON MA 02116

(City) (State) (Zip)
1. Name and Address of Reporting Person*
Kolchinsky Peter

(Last) (First) (Middle)
C/O RA CAPITAL MANAGEMENT, LLC
20 PARK PLAZA, SUITE 1200

(Street)
BOSTON MA 02116

(City) (State) (Zip)
Explanation of Responses:
1. The convertible preferred stock automatically converted to common stock immediately prior to the closing of the Issuer's initial public offering on a 1.196-for-one basis, and had no expiration date.
2. Includes (a) 898,533 shares of Common Stock that are held by RA Capital Healthcare Fund, L.P.(the "Fund") and (b) 205,314 shares of Common Stock that are held in an account owned by a separately managed account (the "Account").
3. RA Capital Management, LLC (the "Adviser") is the general partner of the Fund and the investment adviser for the Account. Peter Kolchinsky is the sole manager of the Adviser. The Adviser and Dr. Kolchinsky may be deemed indirect beneficial owners of the securities and they disclaim beneficial ownership of the reported securities: (A) in reliance on Rule 16a-1(a)(1)(v) and (vii); and (B) held by the Fund, for purposes of Rule 16a-1(a)(2), except to the extent of their pecuniary interest therein.
4. The Adviser and Dr. Kolchinsky have no pecuniary interest in the reported securities held in the Account and disclaim: (A) beneficial ownership thereof for purposes of Rule 16a-1(a)(2); and (B) any obligation to file reports under Section 16 other than as a director by deputization. The filing of this Form 4 shall not be construed as an admission that either the Adviser or Dr. Kolchinsky is or was for the purposes of Section 16(a), or otherwise, the beneficial owner of any of the securities held in the Account.
5. Includes (a) 856,266 shares of Common Stock held by the Fund and (b) 202,558 held in the Account, in each case acquired in the Issuer's initial public offering.
6. These securities include 1,754,799 shares held by the Fund and 407,872 shares held in the Account.
7. Represents 751,282 shares of Series B Convertible Preferred Stock held by the Fund and 171,668 shares of Series B Convertible Preferred Stock held in the Account.
/s/ Peter Kolchinsky, Manager of RA Capital Management, LLC 06/22/2018
/s/ Peter Kolchinsky, Manager of RA Capital Management, LLC, the General Partner of RA Capital Healthcare Fund, L.P. 06/22/2018
/s/ Peter Kolchinsky, individually 06/22/2018
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
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