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 X, 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 A-1 Preferred Stock	(1)	(1)	Common Stock	67,036	(1)	I	See footnote(2)(3)
Series A-1 Preferred Stock	(1)	(1)	Common Stock	1,340,698	(1)	I	See footnote(3)(4)
Series A-2 Preferred Stock	(1)	(1)	Common Stock	1,133,670	(1)	I	See footnote(3)(4)

1. Name and Address of Reporting Person* Lightspeed Venture Partners X, 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 Affiliates X, 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 X, 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 X, 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. Shares held by Lightspeed Affiliates X, L.P., or Lightspeed Affiliates.

3. Lightspeed General Partner X, L.P., or Lightspeed GP X, is the general partner of Lightspeed X and Lightspeed Affiliates. Lightspeed Ultimate General Partner X, Ltd., or Lightspeed UGP X, is the general partner of Lightspeed GP X. Christopher J. Schaepe, Barry Eggers, Ravi Mhatre, Peter Nieh and Jeremy Liew are the directors of Lightspeed UGP X and share voting and dispositive power with respect to the shares held by Lightspeed X and Lightspeed Affiliates. Messrs. Schaepe, Eggers, Liew, Mhatre and Nieh disclaim beneficial ownership of the shares held by Lightspeed X and Lightspeed Affiliates except to the extent of their pecuniary interest therein.

4. Shares held by Lightspeed Venture Partners X, L.P., or Lightspeed X.

Remarks:

	Lightspeed Venture Partners X, L.P., by Lightspeed General Partner X, L.P., its general partner, by Lightspeed Ultimate General Partner X, Ltd., its general partner, /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018
	Lightspeed Affiliates X, L.P., by Lightspeed General Partner X, L.P., its general partner, by Lightspeed Ultimate General Partner X, Ltd., its general partner, /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018
	Lightspeed General Partner X, L.P., by Lightspeed Ultimate General Partner X, Ltd., its general partner, /s/ Christopher J. Schaepe, Duly authorized signatory	06/27/2018
	Lightspeed Ultimate General Partner X, Ltd., /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).
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