Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Gibson Daniel Patrick

2. Date of Event Requiring Statement (MM/DD/YYYY) 6/20/2018

3. Issuer Name and Ticker or Trading Symbol

IMPINJ INC [PI]

(Last) (First) (Middle)

28 HENNESSY ROAD, 20TH FLOOR

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director ___ X ___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

WAN CHAI, K3

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

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	4231582	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 Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)

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.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Gibson Daniel Patrick 28 HENNESSY ROAD, 20TH FLOOR WAN CHAI, K3	X	X
Sylebra HK Co Ltd 20/F, 28 HENNESSY ROAD WAN CHAI, K3		X
Sylebra Capital Management, Ltd 20/F, 28 HENNESSY ROAD WAN CHAI, K3		X

Signatures
/s/ Daniel Gibson		7/9/2018
^** 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.
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 control number.