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*
Lightspeed Venture Partners Select II, L.P.	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	2. Date of Event Requiring Statement (Month/Day/Year)
06/27/2018 	3. Issuer Name and Ticker or Trading Symbol 
Forty Seven, Inc. [ FTSV ] 		
		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 B Preferred Stock	(1) 	(1) 	Common Stock	1,315,519	(1)	I(2) 	See footnote(2) 	
1. Name and Address of Reporting Person*
Lightspeed Venture Partners Select II, L.P.	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Lightspeed General Partner Select II, L.P.	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Lightspeed Ultimate General Partner Select II, Ltd.	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
SCHAEPE CHRISTOPHER J	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Eggers Barry	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

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

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Mhatre Ravi	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
1. Name and Address of Reporting Person*
Liew Jeremy	

(Last)	(First)	(Middle)	
2200 SAND HILL ROAD	

(Street) 
MENLO PARK	CA	94025	

(City)	(State)	(Zip)	
	
Explanation of Responses:	
1. The Issuer's preferred stock will automatically convert into an equal number of shares of Issuer's common stock immediately upon the closing of the Issuer's initial public offering and has no expiration date.	
2. Lightspeed General Partner Select II, L.P., or Select II GP, is the general partner of Lightspeed Venture Partners Select II, L.P., or Lightspeed Select II. Lightspeed Ultimate General Partner Select II, Ltd., or Select II UGP, is the general partner of Select II GP. Christopher J. Schaepe, Barry Eggers, Jeremy Liew, Ravi Mhatre and Peter Nieh are the directors of Select II UGP and share voting and dispositive power with respect to the shares held by Lightspeed Select II. Messrs. Schaepe, Eggers, Liew, Mhatre and Nieh disclaim beneficial ownership of the shares held by Lightspeed Select II except to the extent of their pecuniary interest therein.	
Remarks:	
	
	Lightspeed Venture Partners Select II, L.P., by Lightspeed General Partner Select II, L.P., its general partner, by Lightspeed Ultimate General Partner Select II, Ltd., its general partner, /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018	
	Lightspeed General Partner Select II, L.P, by Lightspeed Ultimate General Partner Select II, Ltd., by /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018	
	Lightspeed Ultimate General Partner Select II, Ltd., by /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018	
	/s/ Christopher J. Schaepe	06/27/2018	
	/s/ Barry Eggers	06/27/2018	
	/s/ Peter Nieh	06/27/2018	
	/s/ Ravi Mhatre	06/27/2018	
	/s/ Jeremy Liew	06/27/2018	
	** 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 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.	
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