Daina Middleton - 05 Sep 2025 Form 4 Insider Report for MARIN SOFTWARE INC (MRIN)

Reporting relationship: Director
Issuer ticker: MRIN
Reported as of: 05 Sep 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 08 Sep 2025, 16:36:35 UTC
Prior SEC filing: 27 May 2025
Next SEC filing: 26 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Daina Middleton by Robert Bertz, Attorney-in-Fact

Key filing fact

Daina Middleton filed Form 4 for MARIN SOFTWARE INC (MRIN) on 08 Sep 2025.

Key facts

This page summarizes Daina Middleton's Form 4 filing for MARIN SOFTWARE INC (MRIN).
5 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 08 Sep 2025, 16:36.

Change

Previous filing in this sequence was filed on 27 May 2025.
Current net transaction value: $0.

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 0001620476 Primary reporting owner

Middleton Daina

Relationship: Director
Address: C/O MARIN SOFTWARE INCORPORATED, 149 NEW MONTGOMERY STREET, 4TH FLOOR, SAN FRANCISCO
Signature: /s/ Daina Middleton by Robert Bertz, Attorney-in-Fact
Signature date: 08 Sep 2025

Reported non-derivative transactions

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

MRIN transaction

Common Stock

Other

Transaction value: $0
Shares: -36,315
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Sep 2025
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MRIN transaction Derivative

Director Stock Option (right to buy)

Other

Transaction value: $0
Shares: -1,428
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,428
Exercise price: $90.30
Footnotes: F1, F2

MRIN transaction Derivative

Director Stock Option (right to buy)

Other

Transaction value: $0
Shares: -1,428
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,428
Exercise price: $67.20
Footnotes: F1, F2

MRIN transaction Derivative

Director Stock Option (right to buy)

Other

Transaction value: $0
Shares: -1,428
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,428
Exercise price: $39.60
Footnotes: F1, F2

MRIN transaction Derivative

Director Stock Option (right to buy)

Other

Transaction value: $0
Shares: -2,816
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Sep 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,816
Exercise price: $24.00
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Daina Middleton is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 2 footnotes

Footnote F1

Pursuant to the Issuer's Second Amended Combined Disclosure Statement and Plan of Reorganization pursuant to Chapter 11 of the Bankruptcy Code (the "Plan"), which was confirmed by the US Bankruptcy Court for the District of Delaware on 8/29/25 & became effective on 9/5/25, all outstanding shares of Issuer common stock (including shares of common stock issuable under equity awards granted under the Issuer's equity incentive plans) & all other options, warrants and rights to acquire common stock, have been cancelled & discharged, & holders of such equity interests are anticipated to receive a distribution on a Pro Rata basis on account thereof, following the anticipated provision of full recoveries to all Holders of Allowed Claims (all such capitalized terms shall have the meanings ascribed to them as set forth in the Plan filed as Exhibit 2.1 to the Current Report on Form 8-K filed by the Issuer with the SEC on 9/5/25).

Footnote F2

The options are fully vested.

SEC remarks

The Reporting Person's holdings have been adjusted to reflect the 1-for-6 reverse stock split of the Issuer's common stock that became effective on April 12, 2024.