Statement of Changes in Beneficial Ownership (4)

FORM 4 [ X ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 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 * Seidl Randy	2. Issuer Name and Ticker or Trading Symbol DATAWATCH CORP [ DWCH ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __ X __ Director                      _____ 10% Owner _____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle) C/O DATAWATCH CORPORATION, 4 CROSBY DRIVE	3. Date of Earliest Transaction (MM/DD/YYYY) 12/13/2018
(Street) BEDFORD, MA 01730 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _ X _ Form filed by One Reporting Person ___ 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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	12/13/2018		U		13499	D	(1)	12501	D
Common Stock	12/13/2018		D		12501	D	(2)	0	D

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 of Derivative Security: 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

Explanation of Responses:
(1)	Pursuant to the terms of the Agreement and Plan of Merger (the "Merger Agreement"), dated as of November 5, 2018, by and among Datawatch Corporation, a Delaware corporation (the "Company"), Altair Engineering Inc., a Delaware corporation (the "Altair"), and Dallas Merger Sub, Inc., a Delaware corporation and a wholly owned subsidiary of Altair (the "Purchaser"), and the terms of the Tender and Support Agreement, dated as of November 5, 2018, by and among Altair, Purchaser and each stockholder of the Company listed on Annex I of the Tender and Support Agreement, the reporting person disposed of these shares of the Company's Common Stock in the tender offer launched by Purchaser.
(2)	Pursuant to the terms of restricted stock unit ("RSU") grant agreements, the vesting of RSUs was accelerated in connection with the Merger and such RSUs became fully vested effective immediately prior to the effective time of the merger contemplated by the Merger Agreement (the "Merger"). Pursuant to the terms of the Merger Agreement, each such RSU was cancelled in the Merger and, in lieu of any issuance of shares in settlement of such RSU, converted into the right to receive a cash payment equal to $13.10 per share (without interest and less any applicable tax withholding).

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Seidl Randy C/O DATAWATCH CORPORATION 4 CROSBY DRIVE BEDFORD, MA 01730	X

Signatures
/s/ Robert V. Jahrling as attorney-in-fact for Reporting Person		12/13/2018
** 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 4(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.
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