Prospect Hill Management, LLC

RIA/Wealth

Prospect Hill Management, LLC is a RIA/Wealth led by John Thomas Mccolgan, reporting $234.2M in AUM as of Q3 2025 with 58% Technology concentration, 98% concentrated in top 10 holdings, 55% allocation to AAPL, and 58% technology allocation.

PresidentJohn Thomas Mccolgan

Portfolio Value: $234.0M
Positions: 14
Top Holding: AAPL at 55.19%
Last Reported: Q3 2025

Address

Top Holdings

Largest long holdings in Prospect Hill Management, LLC's portfolio (97.9% of total portfolio)

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GthenH

Holding	Sector	Position	Weight	Traded	Ownership	Owned Since
1 Apple AAPL	Consumer Electronics Technology	$129.1M	55.19%	+$22.9K Bought	0.00% 507.1K shares	Q4 2020 Held for 5 years
2 Tesla, Inc. TSLA	Auto - Manufacturers Consumer Cyclical	$44.7M	19.09%	+$44.5K Bought	0.00% 100.4K shares	Q4 2020 Held for 5 years
3 Amazon AMZN	Specialty Retail Consumer Cyclical	$11.3M	4.81%	+$32.9K Bought	0.00% 51.3K shares	Q4 2020 Held for 5 years
4 Netflix NFLX	Entertainment Communication Services	$7.4M	3.17%	+$18.0K Bought	0.00% 6.2K shares	Q4 2020 Held for 5 years
5 Alphabet Inc. GOOG	Internet Content & Information Communication Services	$7.3M	3.13%	—	0.00% 30.0K shares	Q4 2020 Held for 5 years
6 Alphabet Inc. GOOGL	Internet Content & Information Communication Services	$6.7M	2.84%	+$60.8K Bought	0.00% 27.4K shares	Q4 2020 Held for 5 years
7 Intuitive Surgical ISRG	Medical - Instruments & Supplies Healthcare	$6.6M	2.83%	-$111.8K Sold	0.00% 14.8K shares	Q4 2020 Held for 5 years
8 Bank of America BAC	Banks - Diversified Financial Services	$6.1M	2.59%	—	0.00% 117.5K shares	Q4 2020 Held for 5 years
9 Nvidia NVDA	Semiconductors Technology	$5.9M	2.54%	+$56.0K Bought	0.00% 31.8K shares	Q1 2022 Held for 3y 9m
10 Mastercard MA	Financial - Credit Services Financial Services	$4.1M	1.74%	—	0.00% 7.2K shares	Q4 2020 Held for 5 years

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GthenH

Changes

Portfolio activity, position movements, and quarter-over-quarter changes in Prospect Hill Management, LLC's latest filing

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Market Value

$234.0M

Prior: $193.8M

Q/Q Change

+20.73%

+$40.2M

Net Flows % of MV

-0.396%

Turnover Ratio

0.322%

New Purchases

0 stocks

Added To

7 stocks

+$290.1K

Sold Out Of

1 stocks

$1.0M

Reduced Holdings

2 stocks

-$210.9K

Increased Positions

Position	Shares Δ	Change
1 Meta Platforms, Inc. META	+4.35%	1.7K → 1.8K +$55.1K
2 Nvidia NVDA	+0.95%	31.5K → 31.8K +$56.0K
3 Alphabet Inc. GOOGL	+0.92%	27.1K → 27.4K +$60.8K
4 Amazon AMZN	+0.29%	51.1K → 51.3K +$32.9K
5 Netflix NFLX	+0.24%	6.2K → 6.2K +$18.0K

Decreased Positions

Position	Shares Δ	Change
1 Arm Holdings ARM	Sold	6.2K → 0 −$1.0M
2 NXP Semiconductors NXPI	-7.21%	6.0K → 5.6K −$99.1K
3 Intuitive Surgical ISRG	-1.66%	15.1K → 14.8K −$111.8K