East Coast Asset Management, LLC.

In its 13F for Q3 2025 (holdings as of September 30, 2025, filed November 14, 2025), East Coast Asset Management, LLC. reported 68 stock positions worth $319.2 million. Its top holding was Alphabet Class C (GOOG) at 15.3% of the portfolio, followed by Perimeter Solutions (PRM, 11.0%) and Transdigm (TDG, 9.7%). Compared with Q2 2025, it opened 2 new positions, sold out of 3, added to 9 and reduced 30. The biggest buy was Tesla (TSLA, shares +15%) and the biggest sale Transdigm (TDG, shares −1%).

Most Recent 13F
Q2 2026
Location
ESSEX, MA
CIK
0001579254
Portfolio Value
$319.2M (Q3 2025)
SEC Filing
0001579254-25-000004 ↗ filed Nov 14, 2025

Holdings Value

0$100.0M$200.0M$300.0M$400.0M Q1 2024: $274.1M Q1 2024 Q2 2024: $275.1M Q2 2024 Q3 2024: $301.2M Q3 2024 Q4 2024: $299.3M Q4 2024 Q1 2025: $282.4M Q1 2025 Q2 2025: $301.4M Q2 2025 Q3 2025: $319.2M $319.2M Q3 2025 Q4 2025: $340.0M Q4 2025 Q1 2026: $303.4M Q1 2026 Q2 2026: $338.6M Q2 2026

Holdings 68 stocks · $319.2M
GOOG Alphabet Inc. Class C 15.28% 200,218 $48.8M Reduce -6.1%
PRM Perimeter Solutions Inc. 11.04% 1,573,973 $35.2M Reduce -24.0%
TDG Transdigm Group Inc. 9.66% 23,387 $30.8M Reduce -1.0%
META Meta Platforms Inc. Class A 9.63% 41,867 $30.7M Reduce -2.1%
TSLA Tesla Inc. 9.53% 68,422 $30.4M Add +15.2%
BRK.B Berkshire Hathaway Inc. Class B 4.99% 31,695 $15.9M Reduce -2.8%
AMZN Amazon.com Inc. 4.22% 61,372 $13.5M Reduce -2.4%
MA Mastercard Inc. Class A 4.15% 23,303 $13.3M Reduce -0.6%
AAPL Apple Inc. 3.14% 39,347 $10.0M Reduce -1.2%
WWD Woodward Inc. 2.32% 29,284 $7.4M Reduce -0.6%
MCO Moody's Corp. 2.15% 14,369 $6.8M Reduce -3.8%
TJX TJX Companies Inc. filed as TJX COS INC NEW 2.12% 46,738 $6.8M Reduce -0.8%
V Visa Inc. Class A 1.76% 16,490 $5.6M Reduce -1.1%
DE Deere & Co. 1.47% 10,260 $4.7M Add +0.2%
SCHW Schwab (charles) Corp. 1.34% 44,892 $4.3M Reduce -0.1%
MKL Markel Group Inc. 1.26% 2,110 $4.0M Reduce -2.8%
MSFT Microsoft Corp. 1.22% 7,531 $3.9M Reduce -1.2%
SHW The Sherwin-Williams Co. 1.15% 10,575 $3.7M Reduce -0.1%
SPY SS SPDR S&P 500 ETF Trust-US 1.09% 5,206 $3.5M No change
WM Waste Management Inc. 0.94% 13,646 $3.0M Reduce -0.4%
LPX Louisiana-Pacific Corp. 0.91% 32,844 $2.9M Reduce -2.3%
CHTR Charter Communications Inc. Class A 0.83% 9,643 $2.7M Reduce -5.6%
BRK.A Berkshire Hathaway Inc. Class A 0.71% 3 $2.3M No change
UNP Union Pacific Corp. 0.63% 8,453 $2.0M Reduce -0.3%
ADP Automatic Data Processing 0.61% 6,589 $1.9M Reduce -0.7%
CR Crane Co. 0.57% 9,957 $1.8M Add +2.0%
CL Colgate-Palmolive Co. 0.52% 20,654 $1.7M Add +0.2%
VOE Vngrd Mrngstr MD-Cap Val ETF 0.46% 8,349 $1.5M Add +0.0%
GOOGL Alphabet Inc. Class A 0.41% 5,385 $1.3M Reduce -1.2%
SYY Sysco Corp. 0.40% 15,566 $1.3M Reduce -0.4%
LH Labcorp Holdings Inc. 0.39% 4,312 $1.2M Reduce -0.1%
PAYX Paychex Inc. 0.35% 8,712 $1.1M No change
JNJ Johnson & Johnson 0.32% 5,589 $1.0M Reduce -0.3%
OEF iShares S&P 100 ETF 0.29% 2,746 $914K No change
BR Broadridge Financial Solutio 0.26% 3,488 $831K No change
DHR Danaher Corp. 0.23% 3,690 $732K Add +0.0%
IWM iShares Russell 2000 ETF 0.19% 2,459 $595K Reduce -0.9%
CMCSA Comcast Corp. Class A 0.18% 18,573 $584K Add +0.1%
RTX RTX Corp. 0.17% 3,278 $549K Add +0.1%
SPLV Invesco S&P 500 Low Volatili 0.17% 7,191 $528K No change
IBM Intl Business Machines Corp. filed as INTERNATIONAL BUSINESS MACHS 0.16% 1,791 $505K Add +0.2%
LMT Lockheed Martin Corp. 0.15% 982 $490K No change
AXP American Express Co. 0.15% 1,442 $479K No change
PG The Procter & Gamble Co. 0.15% 3,108 $477K No change
AMGN Amgen Inc. 0.14% 1,628 $459K No change
HD Home Depot Inc. 0.13% 1,040 $421K No change
INTU Intuit Inc. 0.13% 600 $410K No change
MMM 3M Co. 0.13% 2,585 $401K No change
EWL iShares MSCI Switzerland ETF 0.12% 7,101 $392K No change
IXJ iShares Global Healthcare Et 0.12% 4,193 $372K Reduce -6.2%
ADBE Adobe Inc. 0.12% 1,053 $371K No change
RACE Ferrari NV 0.11% 745 $361K No change
RSG Republic Services Inc. 0.11% 1,563 $359K No change
BSX Boston Scientific Corp. 0.10% 3,304 $323K No change
LBRDK Liberty Broadband-C 0.10% 4,867 $309K Reduce -15.2%
VOO Vanguard S&P 500 ETF 0.10% 500 $306K No change
VUG Vanguard Mrngstar GR ETF-Sui 0.09% 593 $284K No change
WMT Walmart Inc. 0.09% 2,731 $281K Reduce -18.2%
DIS The Walt Disney Co. filed as DISNEY WALT CO 0.09% 2,438 $279K No change
JPM JPMorgan Chase & Co. 0.08% 843 $266K Reduce -23.4%
AMT American Tower Corp. 0.08% 1,253 $241K No change
IWF iShares Russell 1000 Growth 0.08% 514 $241K No change
ELV Elevance Health Inc. 0.07% 730 $236K No change
VWO Vanguard Ftse Emerging Marke 0.07% 4,337 $235K No change
FBTC Fidelity Wise Origin Bitcoin 0.07% 2,345 $234K New
ETN Eaton Corp. PLC 0.07% 617 $231K No change
COST Costco Wholesale Corp. 0.07% 242 $224K No change
PFE Pfizer Inc. 0.07% 8,141 $207K New

Portfolio Sells Q2 2025 → Q3 2025
TDG Transdigm Group Inc. Reduce -1.0% 9.66% −2.26
BN Brookfield Corp. Sold out 0.00% −1.75
META Meta Platforms Inc. Class A Reduce -2.1% 9.63% −0.84
CHTR Charter Communications Inc. Class A Reduce -5.6% 0.83% −0.55
AMZN Amazon.com Inc. Reduce -2.4% 4.22% −0.36
MCO Moody's Corp. Reduce -3.8% 2.15% −0.34
BRK.B Berkshire Hathaway Inc. Class B Reduce -2.8% 4.99% −0.26
MA Mastercard Inc. Class A Reduce -0.6% 4.15% −0.22
V Visa Inc. Class A Reduce -1.1% 1.76% −0.20
MKL Markel Group Inc. Reduce -2.8% 1.26% −0.17
WM Waste Management Inc. Reduce -0.4% 0.94% −0.10
LBRDK Liberty Broadband-C Reduce -15.2% 0.10% −0.09
WWD Woodward Inc. Reduce -0.6% 2.32% −0.08
ACN Accenture PLC Class A Sold out 0.00% −0.07
ADP Automatic Data Processing Reduce -0.7% 0.61% −0.07
CARR Carrier Global Corp. Sold out 0.00% −0.07
SHW The Sherwin-Williams Co. Reduce -0.1% 1.15% −0.06
LPX Louisiana-Pacific Corp. Reduce -2.3% 0.91% −0.05
MSFT Microsoft Corp. Reduce -1.2% 1.22% −0.04
JPM JPMorgan Chase & Co. Reduce -23.4% 0.08% −0.02
UNP Union Pacific Corp. Reduce -0.3% 0.63% −0.02
WMT Walmart Inc. Reduce -18.2% 0.09% −0.02
SCHW Schwab (charles) Corp. Reduce -0.1% 1.34% −0.02
IXJ iShares Global Healthcare Et Reduce -6.2% 0.12% −0.01
IWM iShares Russell 2000 ETF Reduce -0.9% 0.19% +0.01
SYY Sysco Corp. Reduce -0.4% 0.40% +0.01
LH Labcorp Holdings Inc. Reduce -0.1% 0.39% +0.01
JNJ Johnson & Johnson Reduce -0.3% 0.32% +0.04
GOOGL Alphabet Inc. Class A Reduce -1.2% 0.41% +0.09
TJX TJX Companies Inc. Reduce -0.8% 2.12% +0.19
AAPL Apple Inc. Reduce -1.2% 3.14% +0.43
PRM Perimeter Solutions Inc. Reduce -24.0% 11.04% +1.47
GOOG Alphabet Inc. Class C Reduce -6.1% 15.28% +2.72

Portfolio Buys Q2 2025 → Q3 2025
TSLA Tesla Inc. Add +15.2% 9.53% +3.28
FBTC Fidelity Wise Origin Bitcoin New 0.07% +0.07
PFE Pfizer Inc. New 0.07% +0.07
RTX RTX Corp. Add +0.1% 0.17% +0.01
VOE Vngrd Mrngstr MD-Cap Val ETF Add +0.0% 0.46% +0.00
DHR Danaher Corp. Add +0.0% 0.23% −0.01
IBM Intl Business Machines Corp. Add +0.2% 0.16% −0.02
CMCSA Comcast Corp. Class A Add +0.1% 0.18% −0.04
CR Crane Co. Add +2.0% 0.57% −0.04
CL Colgate-Palmolive Co. Add +0.2% 0.52% −0.10
DE Deere & Co. Add +0.2% 1.47% −0.26

All Filings

QuarterPositions13F Reported ValueTop Holdings
Q2 2026 67$338.6MGOOG, TSLA, PRM, TDG, ECHO
Q1 2026 68$303.4MGOOG, TSLA, PRM, TDG, ECHO
Q4 2025 69$340.0MGOOG, PRM, TSLA, TDG, BRK.B
Q3 2025 68$319.2MGOOG, PRM, TDG, META, TSLA
Q2 2025 69$301.4MGOOG, TDG, META, PRM, TSLA
Q1 2025 69$282.4MGOOG, TDG, META, PRM, BN
Q4 2024 71$299.3MGOOG, TDG, PRM, META, BN
Q3 2024 73$301.2MGOOG, TDG, PRM, META, BN
Q2 2024 70$275.1MGOOG, TDG, META, BRK.B, BN
Q1 2024 69$274.1MGOOG, TDG, META, BRK.B, BN