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 Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: January 31, 2005 Estimated average burden hours per response... 0.5

(Print or Type Responses)

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 (Month/Day/Year) 12/27/2017 (Street) SANTA BARBARA, CA 93108 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 Class A Common Stock 12/27/2017   J(1)   139,000 D $ 0 (1) 52,830 (1) I (1) By Pension Plan (1) Class A Common Stock               400,000 I (2) By Duca Fund 12 LLC (2) Class A Common Stock               13,072 I (3) By IGSB IVP III, LLC (2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	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.		SEC 1474 (9-02)

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 Underlying Securities (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

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		12/28/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	These Class A Shares were owned by a pension plan of which the Reporting Person is the sole trustee and who, in that capacity, possessed sole voting and investment power over the Shares. However, the Reporting Person did not and does not possess any pecuniary interest in these Shares. As reported above, on December 27, 2017, 139,000 of the Class A Shares were distributed from the pension plan to the beneficiary of that pension plan, which had the effect of reducing the number of Class A Shares owned by the pension plan, and over which the Reporting Person possesses beneficial ownership, to 52,830 Shares.
(2)	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.
(3)	These Class A Shares are owned by IGSB IVP III, LLC, a private investment fund managed by Investment Group of Santa Barbara LLC ("IGSB"). The Reporting Person 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, the Reporting Person may be deemed to share voting and dispositive power over these Shares with IGSB and its other two members. However, the Reporting Person disclaims beneficial ownership over these Shares, except to the extent of any pecuniary interest therein.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.