Mraz, Amerine & Associates, Inc. AMBC — AMBAC FINL GROUP INC

Ownership history in Mraz, Amerine & Associates, Inc.  ·  30 quarters on record

AI Ownership Summary

Mraz, Amerine & Associates, Inc. reported AMBAC FINL GROUP INC (AMBC) in 30 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.08% in 2023 Q4. The latest visible filing shows AMBC at 0.01% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this AMBC ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Mraz, Amerine & Associates, Inc.'s position in AMBAC FINL GROUP INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

AMBC was reported at 0.01% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.08% in 2023 Q4

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

AMBC stock page Mraz, Amerine & Associates, Inc. fund profile Mraz, Amerine & Associates, Inc. full holdings
How Mraz, Amerine & Associates, Inc. held AMBC — position size vs. price
% of Fund (quarterly)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 21,450 +2,500 +13.2% 0.01% $100K 2026-05-05 $4.38
2025 Q4 ADDED — — — 18,950 +700 +3.8% 0.02% $147K 2026-02-06 $6.11
2025 Q3 REDUCED — — — 18,250 -600 -3.2% 0.02% $152K 2025-11-06 $8.18
2025 Q2 REDUCED — — — 18,850 -700 -3.6% 0.02% $134K 2025-07-23 $8.79
2025 Q1 ADDED — — — 19,550 +4,650 +31.2% 0.03% $169K 2025-04-30 $7.98
2024 Q4 REDUCED — — — 14,900 -700 -4.5% 0.03% $188K 2025-01-31 $11.63
2024 Q3 REDUCED — — — 15,600 -1,000 -6.0% 0.03% $175K 2024-10-23 $11.50
2024 Q2 REDUCED — — — 16,600 -4,500 -21.3% 0.04% $213K 2024-08-01 $12.48
2024 Q1 REDUCED — — — 21,100 -1,500 -6.6% 0.06% $330K 2024-05-15 $18.06
2023 Q4 REDUCED — — — 22,600 -4,250 -15.8% 0.08% $372K 2024-01-31 $16.25
20 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding AMBC

As of 2026 Q1 — sorted by position size

Western Standard LLC 3Y 7Y 5.5% Park Capital Management, LLC / WI 0.1% Brooklyn Investment Group 0.05% ANCHYRA PARTNERS LLC 0.02% Able Wealth Management LLC 0.02% Crown Wealth Group, LLC 3Y 0.02% KLCM Advisors, Inc. 3Y 7Y 0.01% AlphaQuest LLC 0.0% Symmetry Partners, LLC 3Y 7Y 0.0% Wiser Advisor Group LLC 0.0%

FAQ About Mraz, Amerine & Associates, Inc. and AMBC

These are the practical questions this page is built to answer before you even open the full history table.

How long has Mraz, Amerine & Associates, Inc. reported owning AMBC?

Mraz, Amerine & Associates, Inc. reported AMBC across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported AMBC position in Mraz, Amerine & Associates, Inc.'s portfolio?

The largest reported portfolio weight for AMBC was 0.08% in 2023 Q4.

What is the latest reported AMBC position on this page?

The most recent filing on this page is 2026 Q1, when Mraz, Amerine & Associates, Inc. reported 21,450 shares, equal to 0.01% of portfolio, with an estimated market value of $100K.

What does the chart on this AMBC ownership page compare?

The chart compares Mraz, Amerine & Associates, Inc.'s quarterly AMBC portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Mraz, Amerine & Associates, Inc. time their AMBC position?

Based on 13F filing dates vs. subsequent AMBC price moves, Mraz, Amerine & Associates, Inc. correctly timed 14 out of 20 reported position changes (70%). The annualised alpha on AMBC relative to SPY over the holding period was -29.7%.

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