Main Street Research LLC
•CIK: 1513211•Filing: Q4 2025
**Main Street Research LLC** manages $1.7B across a portfolio of 129 positions, exhibiting a concentrated, large-cap technology and financial sector tilt. Top holdings include NVDA at $111.1M and GOOGL at $93.1M, anchoring exposure to semiconductor and internet giants. The fund maintains significant allocations to mega-cap names such as MSFT ($81.3M) and AAPL ($79.1M), alongside strategic bets on PLTR ($78.3M) and JPM ($71.5M). This structure suggests a conviction-driven approach targeting market leaders across diverse, high-growth sectors.
Total AUM
$1.7B
QoQ Performance
-5.5%
Positions
113
Top 10 Concentration
45.3%
Latest Filing
Q4 2025
Top Holdings Allocation
NVDA
GOOGL
NVDA6.4%
GOOGL5.3%
MSFT4.7%
ISCF4.5%
AAPL4.5%
PLTR4.5%
JPM4.1%
AVGO4.1%
📈 Biggest Buys
📉 Biggest Sells
Sector Breakdown
Other44.8%
Technology28.9%
Consumer12.6%
Financial8.5%
Healthcare2.5%
Industrial2.1%
ETF0.2%
Energy0.2%
🚪 Exited Positionssold since Q3 2025
+12 more exited positions
Changes from Q3 2025
NEW17 new positions
↑25 increased
↓77 decreased
Historical Filings
Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023