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* Vector Cambium Holdings (Cayman), L.P. (Last) (First) (Middle) C/O VECTOR CAPITAL MANAGEMENT, L.P. ONE MARKET ST, STEUART TOWER, 23RD FLOOR (Street) SAN FRANCISCO CA 94105 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 06/25/2019	3. Issuer Name and Ticker or Trading Symbol Cambium Networks Corp [ CMBM ]
		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)
Ordinary Shares	77,179(1)	D(2)

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* Vector Cambium Holdings (Cayman), L.P. (Last) (First) (Middle) C/O VECTOR CAPITAL MANAGEMENT, L.P. ONE MARKET ST, STEUART TOWER, 23RD FLOOR (Street) SAN FRANCISCO CA 94105 (City) (State) (Zip)

1. Name and Address of Reporting Person* VECTOR CAPITAL PARTNERS IV, L.P. (Last) (First) (Middle) C/O VECTOR CAPITAL MANAGEMENT, L.P. ONE MARKET ST, STEUART TOWER, 23RD FLOOR (Street) SAN FRANCISCO CA 94105 (City) (State) (Zip)

1. Name and Address of Reporting Person* Vector Capital, Ltd. (Last) (First) (Middle) C/O VECTOR CAPITAL MANAGEMENT, L.P. ONE MARKET ST, STEUART TOWER, 23RD FLOOR (Street) SAN FRANCISCO CA 94105 (City) (State) (Zip)

1. Name and Address of Reporting Person* VECTOR CAPITAL, L.L.C. (Last) (First) (Middle) C/O VECTOR CAPITAL MANAGEMENT, L.P. ONE MARKET ST, STEUART TOWER, 23RD FLOOR (Street) SAN FRANCISCO CA 94105 (City) (State) (Zip)

Explanation of Responses:

1. This amount excludes Ordinary Shares that the Reporting Person will receive in connection with the issuer's Recapitalization (as described in the issuer's prospectus dated June 25, 2019) and upon consummation of the issuer's initial public offering.

2. Vector Capital Partners IV, L.P. is the general partner of Vector Cambium Holdings (Cayman), L.P., and Vector Capital, Ltd. and Vector Capital, L.L.C. are the general partners of Vector Capital Partners IV, L.P. The board of directors of Vector Capital, Ltd. has the exclusive power and authority to vote, or to direct to vote, and to dispose, or to direct the disposition of, the shares held by Vector Cambium Holdings (Cayman), L.P. and therefore holds indirect voting and dispositive power over the shares held by Vector Cambium Holdings (Cayman), L.P. and may be deemed to be the beneficial owner of such shares.

Remarks:

Each of Alexander R. Slusky, the Chief Investment Officer of Vector Capital Management, L.P., and Robert Amen, a Managing Director of Vector Capital Management, L.P., serves on the issuer's board of directors ("Board") as a representative of Vector Capital. By virtue of their representation on the Board, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, the Reporting Persons are deemed to be directors of the issuer by deputization.

	/s/ Vector Cambium Holdings (Cayman), by Vector Capital Partners IV, L.P., by Vector Capital, Ltd., by David Baylor, Director	06/25/2019
	/s/ Vector Capital Partners IV, L.P., by Vector Capital, Ltd., by David Baylor, Director	06/25/2019
	/s/ Vector Capital, Ltd., by David Baylor, Director	06/25/2019
	/s/ Vector Capital, L.L.C., by David Baylor, Chief Operating Officer	06/25/2019
	** Signature of Reporting Person	Date
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