Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] 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 * DUCA MAURICE J	2. Issuer Name and Ticker or Trading Symbol APPFOLIO INC [ APPF ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                      __ X __ 10% Owner _____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle) C/O IGSB, INC., 1485 E. VALLEY ROAD, SUITE H	3. Date of Earliest Transaction (MM/DD/YYYY) 10/17/2017
(Street) SANTA BARBARA, CA 93108 (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
Class A Common Stock	10/17/2017		J (1)		13072	A	$0.00   (1)	13072	I   (1) (2)	By IGSB IVP III, LLC
Class A Common Stock								400000	I   (3)	By Duca Fund 12, LLC
Class A Common Stock								191830	I   (4)	By Pension Plan

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)	Pro rata distribution of shares of Class A Common Stock ("Class A Shares") from two limited partnerships with respect to which, from a beneficial ownership standpoint, the reporting person may be deemed, in each case, to be an indirect limited partner. See Note (2) below.
(2)	These Class A Shares are owned by IGSB IVP III, LLC, a private investment fund managed by Investment Group of Santa Barbara LLC ("IGSB"). Mr. Duca is one of three members of IGSB and all decisions regarding the voting and disposition of these Shares require the unanimous approval of all three of IGSB's members. As a result, Mr. Duca may be deemed to share voting and dispositive power over these Shares with IGSB and its other two members. However, Mr. Duca disclaims beneficial ownership of these Shares, except to the extent of any pecuniary interest he may have therein.
(3)	These Class A Shares are held by a limited liability company, of which the Reporting Person is the sole manager. In that capacity, the Reporting Person possesses sole voting and dispositive power over all of these Shares, but disclaims beneficial ownership over these Shares except to the extent of his pecuniary interest therein.
(4)	These Class A Shares are owned by the Pension Plan of which the Reporting Person is the sole trustee. In that capacity he possesses sole voting and investment power over these Class A Shares. However, the Reporting Person does not have and he disclaims any pecuniary interest in these Class A Shares.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DUCA MAURICE J C/O IGSB, INC. 1485 E. VALLEY ROAD, SUITE H SANTA BARBARA, CA 93108		X

Signatures
Maurice J. Duca, By: /s/ Kimberly Shea, Attorney-in-Fact for Maurice J. Duca		10/19/2017
** 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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