AMBAC FINANCIAL GROUP INC

AMBC

Form 4 • Statement of Changes in Beneficial Ownership

SEC Accession Number: 0001628280-26-015345
Filing date: Mar 5, 2026
Earliest execution date: Mar 3, 2026
Reporting Owners: Smith R Sharon (COO)

Summary

Type

Sell

Net shares

-1,541

% of shares

-1.02%

Amount (USD)

$8,629

Insider confidence score

47.5 out of 100

Positive

  • Tax withholding obligation
  • Minimal sell amount (<$10K)

Negative

  • Large tax withholding sell (≥1% of shares)

Stock transactions

Transaction 1

Security

Common Stock

Action

Exercise

Date

2026-03-03

Code

M

Net shares

+1,541.0

Acquired/Disposed

Acquired

Shares Owned Before

149,182.0

Shares Owned After

150,723.0

Transaction 2

Security

Common Stock

Action

Tax_withhold

Date

2026-03-03

Code

F

Net shares

-1,541.0

Price per Share

$5.60

Amount (USD)

$8,629.60

Acquired/Disposed

Disposed

Shares Owned Before

150,723.0

Shares Owned After

149,182.0

Derivative Transactions

Transaction 1

Security

Restricted Stock Units

Action

Exercise

Date

2026-03-03

Code

M

Net shares

-10,261.0

Acquired/Disposed

Disposed

Shares Owned Before

106,200.0

Shares Owned After

95,939.0

Transaction 2

Security

Deferred Share Units

Action

Exercise

Date

2026-03-03

Code

M

Net shares

-8,720.0

Acquired/Disposed

Disposed

Shares Owned Before

76,206.0

Shares Owned After

67,486.0

Filing's footnotes

1. The reporting person acquired shares of common stock of Octave Specialty Group, Inc. (the &quot;Company&quot;) upon the vesting and settlement of a portion of the reporting person's 2023 and 2024 restrictive stock unit (&quot;RSU&quot;) awards.

2. Represents the amount of RSUs that were converted into shares of common stock and withheld by the Company to satisfy certain tax withholding obligations.

3. Each RSU represents a contingent right to receive one share of the common stock of the Company.

4. Represents the aggregate amount of RSUs that vested.

5. Each deferred share unit (&quot;DSU&quot;) represents a contingent right to receive one share of common stock of the Company.

6. Represents the aggregate amount of RSUs that were converted into an equivalent number of DSUs pursuant to the Company's Executive Stock Deferral Plan, which was designed to enable participants to elect to defer the settlement and income taxation of RSU and Performance Stock Unit awards in accordance with Section 409A of the Internal Revenue Code of 1986, as amended.

This page is for informational purposes only. While we strive for accuracy, the summary may contain inaccuracies or omissions. Please refer to the official SEC filing for authoritative information. Open the SEC filing.