Maurice J. Duca - 18 Aug 2026 Form 4 Insider Report for APPFOLIO INC (APPF)

Reporting relationship: 10%+ Owner
Issuer ticker: APPF
Reported as of: 18 Aug 2026
Net transaction value: -$1,639,607
SEC form: 4
Accepted by SEC: 20 Aug 2026, 18:33:56 UTC
Prior SEC filing: 18 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Kimberly Shea, Attorney-in-Fact for Maurice J. Duca

Key filing fact

Maurice J. Duca filed Form 4 for APPFOLIO INC (APPF) on 20 Aug 2026.

Key facts

This page summarizes Maurice J. Duca's Form 4 filing for APPFOLIO INC (APPF).
30 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 20 Aug 2026, 18:33.

Change

Previous filing in this sequence was filed on 18 Aug 2026.
Current net transaction value: -$1,639,607.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0000938333 Primary reporting owner

DUCA MAURICE J

Relationship: 10%+ Owner
Address: C/O IGSB, INC., 1485 E. VALLEY ROAD, SUITE H, SANTA BARBARA
Signature: /s/ Kimberly Shea, Attorney-in-Fact for Maurice J. Duca
Signature date: 20 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

APPF transaction

Class A Common Stock

Sale

Transaction value: $2,968
Shares: -15
Change %: -0.05%
Price: $197.84
Shares after: 31,647
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F2

APPF transaction

Class A Common Stock

Sale

Transaction value: $3,580
Shares: -18
Change %: -0.06%
Price: $198.89
Shares after: 31,629
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F3

APPF transaction

Class A Common Stock

Sale

Transaction value: $8,412
Shares: -42
Change %: -0.13%
Price: $200.29
Shares after: 31,587
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F4

APPF transaction

Class A Common Stock

Sale

Transaction value: $12,895
Shares: -64
Change %: -0.2%
Price: $201.49
Shares after: 31,523
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F5

APPF transaction

Class A Common Stock

Sale

Transaction value: $8,314
Shares: -41
Change %: -0.13%
Price: $202.77
Shares after: 31,482
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F6

APPF transaction

Class A Common Stock

Sale

Transaction value: $64,015
Shares: -314
Change %: -1%
Price: $203.87
Shares after: 31,168
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F7

APPF transaction

Class A Common Stock

Sale

Transaction value: $23,163
Shares: -113
Change %: -0.36%
Price: $204.98
Shares after: 31,055
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F8

APPF transaction

Class A Common Stock

Sale

Transaction value: $10,298
Shares: -50
Change %: -0.16%
Price: $205.95
Shares after: 31,005
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1, F9

APPF transaction

Class A Common Stock

Sale

Transaction value: $6,923
Shares: -35
Change %: -0.27%
Price: $197.81
Shares after: 12,989
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F2

APPF transaction

Class A Common Stock

Sale

Transaction value: $8,950
Shares: -45
Change %: -0.35%
Price: $198.90
Shares after: 12,944
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F3

APPF transaction

Class A Common Stock

Sale

Transaction value: $20,430
Shares: -102
Change %: -0.79%
Price: $200.29
Shares after: 12,842
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F4

APPF transaction

Class A Common Stock

Sale

Transaction value: $32,238
Shares: -160
Change %: -1.2%
Price: $201.49
Shares after: 12,682
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F5

APPF transaction

Class A Common Stock

Sale

Transaction value: $20,277
Shares: -100
Change %: -0.79%
Price: $202.77
Shares after: 12,582
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F6

APPF transaction

Class A Common Stock

Sale

Transaction value: $153,929
Shares: -755
Change %: -6%
Price: $203.88
Shares after: 11,827
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F7

APPF transaction

Class A Common Stock

Sale

Transaction value: $57,599
Shares: -281
Change %: -2.4%
Price: $204.98
Shares after: 11,546
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F8

APPF transaction

Class A Common Stock

Sale

Transaction value: $25,126
Shares: -122
Change %: -1.1%
Price: $205.95
Shares after: 11,424
Date: 18 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F9

APPF transaction

Class A Common Stock

Sale

Transaction value: $24,329
Shares: -123
Change %: -0.24%
Price: $197.80
Shares after: 50,609
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F2, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $32,620
Shares: -164
Change %: -0.32%
Price: $198.90
Shares after: 50,445
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F10, F11

APPF transaction

Class A Common Stock

Sale

Transaction value: $71,303
Shares: -356
Change %: -0.71%
Price: $200.29
Shares after: 50,089
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F4, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $116,058
Shares: -576
Change %: -1.1%
Price: $201.49
Shares after: 49,513
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F5, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $72,794
Shares: -359
Change %: -0.73%
Price: $202.77
Shares after: 49,154
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F6, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $527,641
Shares: -2,588
Change %: -5.3%
Price: $203.88
Shares after: 46,566
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F7, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $204,980
Shares: -1,000
Change %: -2.1%
Price: $204.98
Shares after: 45,566
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F8, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $89,382
Shares: -434
Change %: -0.95%
Price: $205.95
Shares after: 45,132
Date: 18 Aug 2026
Ownership: By Pension Trust
Footnotes: F1, F9, F10

APPF transaction

Class A Common Stock

Sale

Transaction value: $4,457
Shares: -22
Change %: -0.19%
Price: $202.61
Shares after: 11,402
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1

APPF transaction

Class A Common Stock

Sale

Transaction value: $4,488
Shares: -22
Change %: -0.19%
Price: $203.98
Shares after: 11,380
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1

APPF transaction

Class A Common Stock

Sale

Transaction value: $7,845
Shares: -38
Change %: -0.33%
Price: $206.46
Shares after: 11,342
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F12

APPF transaction

Class A Common Stock

Sale

Transaction value: $1,451
Shares: -7
Change %: -0.06%
Price: $207.27
Shares after: 11,335
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1

APPF transaction

Class A Common Stock

Sale

Transaction value: $9,201
Shares: -44
Change %: -0.39%
Price: $209.12
Shares after: 11,291
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F13

APPF transaction

Class A Common Stock

Sale

Transaction value: $13,938
Shares: -66
Change %: -0.58%
Price: $211.18
Shares after: 11,225
Date: 19 Aug 2026
Ownership: By Family Trust
Footnotes: F1, F14

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 14 footnotes

Footnote F1

Sales made pursuant to a 10b5-1 trading plan previously adopted by the Reporting Person on March 13, 2026.

Footnote F2

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $197.50 to $198.38, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F3

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $198.825 to $199.01, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F4

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $199.98 to $200.68, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F5

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $201.03 to $201.95, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F6

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $202.23 to $203.00, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F7

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $203.355 to $204.29, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F8

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $204.49 to $205.46, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F9

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $205.495 to $206.14, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F10

These shares of Class A Common Stock ("Class A Shares") are held by a pension trust of which the Reporting Person is the sole trustee and who, in that capacity, possesses sole voting and sole dispositive power over these Class A Shares. However, the Reporting Person does not possess any pecuniary interest in these Class A Shares.

Footnote F11

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $198.825 to $199.10, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F12

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $206.05 to $207.03, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F13

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $209.01 to $209.22, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F14

This price reflects the weighted average price at which these shares were sold. The shares were sold in multiple transactions at prices ranging from $210.94 to $211.67, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC remarks

Due to a 30 line-item limitation in Table I, this is the first of two Forms 4 filed by the Reporting Person on August 20, 2026.