MBB PUBLIC MARKETS I LLC
Long book
$835.2M
Q1 2026
Positions
24
Top-10 weight
99%
concentration
Last quarter
+8.0%
SPY +14.8%
Turnover
30%
of book per quarter
Strategy in plain words
auto-generated from filingsMBB PUBLIC MARKETS I LLC is a quantitative fund whose holdings reflect models, not opinions, running a $835.2M US long book across 24 positions.
The portfolio is extremely concentrated — the top 10 positions are almost the whole book. The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: PROGRESSIVE CORP, AERCAP HOLDINGS NV, AMAZON.COM INC, FERGUSON ENTERPRISES INC, MEDLINE INC-CL A.
Over the last 9 quarters its long book ran on average 2.1pp per quarter behind the S&P 500, beating the index in 3 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
+0.3%
Q2 2024
+5.3%
Q3 2024
-6.6%
Q4 2024
-1.1%
Q1 2025
+8.3%
Q2 2025
+3.4%
Q3 2025
+5.7%
Q4 2025
-1.5%
Q1 2026
+8.0%
Sector allocation
Consumer discretionary 33%
Financials 22%
Services media 20%
Healthcare 14%
Energy 4%
Technology 4%
Materials 2%
Consumer staples 1%
Long book by quarter
What does MBB PUBLIC own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| PGR PROGRESSIVE CORP | Financials | 890.6K | $176.5M | 21.1% | +2.9% |
| AER AERCAP HOLDINGS NV | Services media | 1.1M | $155.5M | 18.6% | Held |
| AMZN AMAZON.COM INC | Consumer discretionary | 681.3K | $141.9M | 17.0% | +7.1% |
| FERG FERGUSON ENTERPRISES INC | Consumer discretionary | 527.8K | $123.1M | 14.7% | +12.8% |
| MDLN MEDLINE INC-CL A | Healthcare | 2.4M | $108.6M | 13.0% | Held |
| EQT EQT CORP | Energy | 475.0K | $30.2M | 3.6% | -23.0% |
| GOOGL ALPHABET INC-CL A | Technology | 90.0K | $25.9M | 3.1% | -43.0% |
| TECK TECK RESOURCES LTD-CLS B | Materials | 323.2K | $16.7M | 2.0% | -42.6% |
| BG BUNGE GLOBAL SA | Consumer staples | 77.4K | $9.8M | 1.2% | -23.3% |
| KYTX KYVERNA THERAPEUTICS INC | Healthcare | 614.5K | $5.3M | 0.6% | Held |
| AVGO BROADCOM INC | Technology | 10.0K | $3.1M | 0.4% | -84.6% |
| GTX GARRETT MOTION INC | Industrials | 15.8K | $287K | 0.0% | Held |
| IBP INSTALLED BUILDING PRODUCTS | Industrials | 1.0K | $265K | 0.0% | Held |
| ESI ELEMENT SOLUTIONS INC | Other | 7.4K | $254K | 0.0% | New |
| AMG AFFILIATED MANAGERS GROUP | Financials | 894 | $247K | 0.0% | Held |
| IMXI INTERNATIONAL MONEY EXPRESS | Services media | 14.2K | $224K | 0.0% | Held |
| SAIA SAIA INC | Industrials | 618 | $217K | 0.0% | Held |
| AHCO ADAPTHEALTH CORP | Healthcare | 18.1K | $216K | 0.0% | Held |
| VMD VIEMED HEALTHCARE INC | Healthcare | 23.4K | $215K | 0.0% | Held |
| UNF UNIFIRST CORP/MA | Services media | 854 | $215K | 0.0% | New |
| RUSHA RUSH ENTERPRISES INC-CL A | Consumer discretionary | 3.2K | $211K | 0.0% | New |
| HLMN HILLMAN SOLUTIONS CORP | Industrials | 21.6K | $180K | 0.0% | Held |
| JBI JANUS INTERNATIONAL GROUP IN | Industrials | 19.8K | $102K | 0.0% | Held |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 25 | $839.4M | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 27 | $957.2M | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 14, 2025 | 38 | $752.4M | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 503 | $1.06B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR/ARESTATEMENT | May 16, 2025 | 531 | $906.6M | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 531 | $807.9M | SEC ↗ | |
| Q4 2024 | 13F-HR | Feb 14, 2025 | 84 | $1.08B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 560 | $1.79B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 693 | $4.95B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 287 | $1.63B | canonical | SEC ↗ |
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