SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* Highland Management Partners VI, Inc. (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Carbon Black, Inc. [ CBLK ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 12/12/2018
	4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/12/2018		J(1)		1,166,810	D	$0	2,035,739	I	By Highland Capital Partners VI Limited Partnership(1)
Common Stock	12/12/2018		J(2)		639,653	D	$0	1,116,002	I	By Highland Capital Partners VI-B Limited Partnership(2)
Common Stock	12/12/2018		J(3)		57,792	D	$0	100,829	I	By Highland Entrepreneurs' Fund VI Limited Partnership(3)
Common Stock	12/12/2018		J(4)		298,754	D	$0	521,234	I	By Highland Capital Partners VII Limited Partnership(4)
Common Stock	12/12/2018		J(5)		72,394	D	$0	126,304	I	By Highland Capital Partners VII-B Limited Partnership(5)
Common Stock	12/12/2018		J(6)		105,428	D	$0	183,940	I	By Highland Capital Partners VII-C Limited Partnership(6)
Common Stock	12/12/2018		J(7)		9,362	D	$0	16,331	I	By Highland Entrepreneurs' Fund VII Limited Partnership(7)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* Highland Management Partners VI, Inc. (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* HIGHLAND MANAGEMENT PARTNERS VI L P (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* HIGHLAND CAPITAL PARTNERS VI-B LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* HIGHLAND CAPITAL PARTNERS VI LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* HIGHLAND ENTREPRENEURS FUND VI LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* Highland Management Partners VII, LLC (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* Highland Management Partners VII Limited Partnership (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* Highland Capital Partners VII LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* HIGHLAND CAPITAL PARTNERS VII-B L P (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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* Highland Capital Partners VII-C LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (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. Effective December 12, 2018, Highland Capital Partners VI Limited Partnership ("HCP VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 1,166,810 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VI Limited Partnership ("HMP VI LP"), the general partner of HCP VI, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management Partners VI, Inc. ("Highland Management"). Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

2. Effective December 12, 2018, Highland Capital Partners VI-B Limited Partnership ("HCP VI-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 639,653 shares of Common Stock of the Issuer to its limited partners, including HMP VI LP, the general partner of HCP VI-B, and to the limited partners of HMP VI LP. The general partner of HMP VI LP is Highland Management. Each of HMP VI LP and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

3. Effective December 12, 2018, Highland Entrepreneurs' Fund VI Limited Partnership ("HEF VI"), a venture capital partnership, distributed in-kind, without consideration, a total of 57,792 shares of Common Stock of the Issuer to its limited partners, including HEF VI Limited Partnership ("HEF"), the general partner of HEF VI, and to the limited partners of HEF. The general partner of HEF is Highland Management. Each of HEF and Highland Management disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

4. Effective December 12, 2018, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 298,754 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII Limited Partnership ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is Highland Management Partners VII, LLC ("HMP VII LLC"). Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

5. Effective December 12, 2018, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 72,394 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

6. Effective December 12, 2018, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 105,428 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

7. Effective December 12, 2018, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 9,362 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII LP. The general partner of HMP VII LP is HMP VII LLC. Each of HMP VII LP and HMP VII LLC disclaims Section 16 beneficial ownership of all shares except to the extent of their pecuniary interest, if any, therein. This report shall not be deemed to be an admission that the reporting persons are the beneficial owners of such securities for purposes of Section 16 or for any other purpose.

Remarks:

Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, Highland Entrepreneurs' Fund VII Limited Partnership and HEF VI Limited Partnership have filed a separate Form 4. The Reporting Persons are jointly filing this Form 4 pursuant to Rule 16a-3(j) under the Exchange Act

	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VI, Inc.	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VI, Inc., the general partner of Highland Management Partners VI Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VI, Inc., the general partner of Highland Management Partners VI Limited Partnership, the general partner of Highland Capital Partners VI Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VI, Inc., the general partner of Highland Management Partners VI Limited Partnership, the general partner of Highland Capital Partners VI-B Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VI, Inc., the general partner of HEF VI Limited Partnership, the general partner of Highland Entrepreneurs' Fund VI Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VII, LLC	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII-B Limited Partnership	12/14/2018
	By: /s/ Jessica Healey, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII-C Limited Partnership	12/14/2018
	** Signature of Reporting Person	Date
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