Data as of Q4 2025 (Dec 31, 2025)·Next filing deadline: May 15, 2026

East Coast Asset Management, LLC.

•CIK: 1579254•Filing: Q4 2025

**East Coast Asset Management, LLC.** manages $340M across a portfolio of 69 positions. The firm exhibits a concentrated, technology-leaning mandate, with top holdings heavily weighted toward mega-cap growth names. Key allocations include GOOG at $61.5M, PRM at $37.6M, and TSLA at $36.7M. This structure indicates a tactical focus on market leaders within the technology and industrial sectors.

Total AUM

$340.0M

QoQ Performance

+6.5%

Positions

62

Top 10 Concentration

73.4%

Latest Filing

Q4 2025

Top Holdings Allocation

GOOG

PRM

TSLA

T7D

GOOG18.1%

PRM11.1%

TSLA10.8%

T7D9.1%

BRK/B4.5%

SATS4.4%

META4.2%

AMZN4.1%

📈 Biggest Buys

ECHOSTAR CORP

NEW

4.4% of portfolio

TESLA INC

+19.3%

10.8% of portfolio

FIDELITY WISE ORIGIN BITCOIN

+222.0%

0.2% of portfolio

MICROSOFT CORP

+10.3%

1.2% of portfolio

PROFESIONALLY MANAGED PORTFO

NEW

0.1% of portfolio

📉 Biggest Sells

META PLATFORMS INC

-47.8%

4.2% of portfolio

PERIMETER SOLUTIONS INC

-13.2%

11.1% of portfolio

ALPHABET INC

-2.0%

18.1% of portfolio

BERKSHIRE HATHAWAY INC DEL

-3.5%

4.5% of portfolio

AMAZON COM INC

-1.6%

4.1% of portfolio

Sector Breakdown

Other39.3%

Technology27.7%

Consumer15.1%

Financial12.3%

Industrial2.4%

ETF1.1%

Materials1.0%

Healthcare0.9%

🚪 Exited Positionssold since Q3 2025

CHARTER COMMUNICATIONS INC N

SOLD

$2.7M

LIBERTY BROADBAND CORP

SOLD

$309.2K

EATON CORP PLC

SOLD

$230.9K

Changes from Q3 2025

NEW4 new positions

↑9 increased

↓34 decreased

Historical Filings

Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

📌 Top Holdings

PERIMETER SOLUTIONS INC

TRANSDIGM GROUP INC

BERKSHIRE HATHAWAY INC DEL

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