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* Gibson Daniel Patrick (Last) (First) (Middle) 28 HENNESSY ROAD, 20TH FLOOR (Street) WAN CHAI K3 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 06/20/2018	3. Issuer Name and Ticker or Trading Symbol IMPINJ INC [ PI ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X 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	4,231,582	I	Control person of managed fund - footnote 1(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* Gibson Daniel Patrick (Last) (First) (Middle) 28 HENNESSY ROAD, 20TH FLOOR (Street) WAN CHAI K3 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer X Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Sylebra HK Co Ltd (Last) (First) (Middle) 20/F, 28 HENNESSY ROAD (Street) WAN CHAI K3 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Sylebra Capital Management, Ltd (Last) (First) (Middle) 20/F, 28 HENNESSY ROAD (Street) WAN CHAI K3 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. Sylebra HK Company Limited ("SHK") may be deemed to beneficially own the Shares by virtue of its position as the investment advisor to Sylebra Capital Management Limited ("SCM") in relation to the direct holders of the shares: Sylebra Capital Partners Master Fund Limited and other advisory clients (together "SCPMF"). SCM serves as the investment manager to SCPMF and is the parent of SHK. Mr. Gibson owns 100% of the shares of SHK and SCM. In such capacities, SHK, SCM and Mr. Gibson may be deemed to have voting and dispositive power over the Shares held for the SCPMF.

Remarks:

	/s/ Daniel Gibson	07/09/2018
	** 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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