SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES 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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1. Name and Address of Reporting Person* INTERWEST PARTNERS X LP (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 03/22/2016	3. Issuer Name and Ticker or Trading Symbol Eiger BioPharmaceuticals, Inc. [ EIGR ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1,599,593	D(1)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* INTERWEST PARTNERS X LP (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* InterWest Management Partners X, LLC (Last) (First) (Middle) 2710 SAND HILL ROAD SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* CLEVELAND BRUCE A (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* GIANOS PHILIP T (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Holmes W Stephen (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Kliman Gilbert H (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* ORONSKY ARNOLD L (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Desai Keval (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* NASR KHALED (Last) (First) (Middle) 2710 SAND HILL ROAD, SECOND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

Explanation of Responses:

1. The shares are owned by InterWest Partners X, LP ("IW10"). InterWest Management Partners X, LLC ("IMP10") is the general partner of IW10. Bruce A. Cleveland, Philip T. Gianos, W. Stephen Holmes, Gilbert H. Kliman and Arnold L. Oronsky are managing directors of IMP10. Keval Desai and Khaled A. Nasr are venture members of IMP10. Each managing director and venture member of IMP10 disclaims beneficial ownership of such shares, except to the extent of his or her pecuniary interest therein.

Remarks:

	/s/ Arnold L. Oronsky, Managing Director of InterWest Management Partners X, LLC	03/22/2016
	/s/ Arnold L. Oronsky, Managing Director of InterWest Management Partners X, LLC, the General Partner of InterWest Partners X, LP	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Bruce A. Cleveland	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Philip T. Gianos	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for W. Stephen Holmes	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Gilbert H. Kliman	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Arnold L. Oronsky	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Keval Desai	03/22/2016
	/s/ Karen A. Wilson, Attorney-in-Fact for Khaled A. Nasr	03/22/2016
	** 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 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Exhibit 99


FORM 3 JOINT FILER INFORMATION
Name of
"Reporting Persons":	InterWest Partners X, L.P. ("IW 10")
			InterWest Management Partners X, LLC ("IMP10")
			Bruce A. Cleveland
			Philip T. Gianos
			W. Stephen Holmes
			Gilbert H. Kliman
			Arnold L. Oronsky
			Keval Desai
			Khaled Nasr
Address:			2710 Sand Hill Road, Suite 200
			Menlo Park, CA 94025
Designated Filer:		InterWest Partners X, L.P.
Issuer and Ticker Symbol: Eiger BioPharmaceuticals, Inc. ("EIGR")
Date of Event:		March 22, 2016


Each of the following is a Joint Filer with InterWest Partners X L.P. ("IW10")
and may be deemed to share indirect beneficial ownership in the securities set
forth on the attached Form 3:
InterWest Management Partners X, LLC ("IMP10") is the general partner of IW10
and has sole voting and investment control over the shares owned by IW10.  Bruce
A. Cleveland, Philip T. Gianos, W. Stephen Holmes, Gilbert H. Kliman, and Arnold
L. Oronsky are Managing Directors of IMP10 and, Keval Desai and Khaled A. Nasr
are Venture Members of IMP10.  Nina Kjellson, a Member of IMP10 is also a
Director of the Issuer, and has filed a separate Form 3 in her own name.
All Reporting Persons disclaim beneficial ownership of shares of Eiger
Biopharmaceuticals, Inc. stock held by IW10, except to the extent of their
respective pecuniary interest therein.  The filing of this statement shall not
be deemed an admission that, for purposes of Section 16 of the Securities
Exchange Act of 1934, or otherwise, any of the Reporting Persons are the
beneficial owner of all of the equity securities covered by this statement.


Each of the Reporting Persons listed above has designed InterWest Partners X,
L.P. as its designated filer of Forms 3, 4 and 5 in accordance with Section
16(a) of the Securities Exchange Act of 1934 and the rules thereunder.  Each
Reporting Person has appointed InterWest Management Partners X, LLC as its
attorney in fact for the purpose of making reports relating to transaction in
Eiger BioPharmaceuticals, Inc. Common Stock.
INTERWEST MANAGEMENT PARTNERS X, L.L.C.
By: /s/ Arnold L.Oronsky
Arnold L.Oronsky, Managing Director
INTERWEST PARTNERS X, LP
By:	InterWest Management Partners X, LLC
Its General Partner
By: /s/ Arnold L.Oronsky
Arnold L.Oronsky, Managing Director
Bruce A. Cleveland, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
Philip T. Gianos, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
W. Stephen Holmes, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
Gilbert H. Kliman, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
Arnold L. Oronsky, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
Keval Desai, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney
Khaled A. Nasr, an individual
By: 	InterWest Management Partners X, LLC
as Attorney-in-Fact
By: /s/ Karen A. Wilson
Karen A. Wilson, Power of Attorney