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* Longitude Capital Partners III, LLC (Last) (First) (Middle) 2740 SAND HILL RD 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/08/2019	3. Issuer Name and Ticker or Trading Symbol 89bio, Inc. [ ETNB ]
		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)

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
Series A Preferred Stock	(1)	(1)	Common Stock	1,916,787(1)	(1)	I	See footnote(2)

1. Name and Address of Reporting Person* Longitude Capital Partners III, LLC (Last) (First) (Middle) 2740 SAND HILL RD 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Longitude Venture Partners III, L.P. (Last) (First) (Middle) 2740 SAND HILL RD 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* Tammenoms Bakker Juliet (Last) (First) (Middle) 2740 SAND HILL RD 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* ENRIGHT PATRICK G (Last) (First) (Middle) 2740 SAND HILL RD 2ND FLOOR (Street) MENLO PARK CA 94025 (City) (State) (Zip)

Explanation of Responses:

1. Each share of Series A Preferred Stock is convertible into common stock on a one-for-6.217 basis into the number of shares of common stock shown in column 3 at any time at the holder's election and automatically immediately prior to the closing of the Issuer's initial public offering. The Series A Preferred Stock has no expiration date.

2. These shares are held directly by Longitude Venture Partners III, L.P. ("Longitude Venture III"). Longitude Capital Partners III, LLC ("Longitude Capital III") is the general partner of Longitude Venture III and may be deemed to have shared voting, investment and dispositive power with respect to these securities. Patrick G. Enright and Juliet Tammenoms Bakker are the managing members of Longitude Capital III (each a "Manager" and collectively, the "Managers") and may each be deemed to share voting, investment and dispositive power with respect to these securities. Each of Longitude Capital III and the Managers disclaims beneficial ownership of these securities and this report shall not be deemed an admission that any of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.

Remarks:

	Longitude Venture Partners III, L.P.; By /s/ Patrick G. Enright, Managing Member	11/08/2019
	Longitude Capital Partners III, LLC; By /s/ Patrick G. Enright, Managing Member	11/08/2019
	/s/ Juliet Tammenoms Bakker	11/08/2019
	/s/ Patrick G. Enright	11/08/2019
	** 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).
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