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Prospect Hill Management, LLC

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13F filer, CIK 1837320, SHORT HILLS, NJ

Prospect Hill Management, LLC reported $233,960,543 across 14 holdings for the quarter ended 2025-09-30, in a 13F-HR filed 2025-11-07. Its ten largest share positions make up 97.93% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001837320-25-000009

Period
2025-09-30
Reported value
$234M
Holdings
14
Top 10 weight
97.93%
New
0
Sold out
1

Largest buys vs the previous quarter

SecurityShares changeApprox. value
GOOGLadded+250$60.8K
NVDAadded+300$56K
METAadded+75$55.1K
TSLAadded+100$44.5K
AMZNadded+150$32.9K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
ARMexited-6,214-$1.01M
ISRGreduced-250-$112K
NXPIreduced-435-$99.1K

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2025

Share positions as resolved from 13F-HR 0001837320-25-000009, largest first. % of portfolio is the value over $233,960,543, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
AAPLAPPLE INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 513,836 shares; 2024Q4: 512,031 shares; 2025Q1: 512,481 shares; 2025Q2: 506,986 shares; 2025Q3: 507,076 shares 507,076$129M55.19%+90Timeline
TSLATESLA INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 99,062 shares; 2024Q4: 99,022 shares; 2025Q1: 100,291 shares; 2025Q2: 100,317 shares; 2025Q3: 100,417 shares 100,417$44.7M19.09%+100Timeline
AMZNAMAZON COM INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 51,818 shares; 2024Q4: 51,718 shares; 2025Q1: 51,643 shares; 2025Q2: 51,143 shares; 2025Q3: 51,293 shares 51,293$11.3M4.81%+150Timeline
NFLXNETFLIX INC.Quarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,181 shares; 2024Q4: 6,181 shares; 2025Q1: 6,181 shares; 2025Q2: 6,176 shares; 2025Q3: 6,191 shares 6,191$7.42M3.17%+15Timeline
GOOGALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 30,020 shares; 2024Q4: 30,020 shares; 2025Q1: 30,020 shares; 2025Q2: 30,020 shares; 2025Q3: 30,020 shares 30,020$7.31M3.13%0Timeline
GOOGLALPHABET INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 27,120 shares; 2024Q4: 27,120 shares; 2025Q1: 27,120 shares; 2025Q2: 27,120 shares; 2025Q3: 27,370 shares 27,370$6.65M2.84%+250Timeline
ISRGINTUITIVE SURGICAL INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 14,325 shares; 2024Q4: 14,325 shares; 2025Q1: 15,125 shares; 2025Q2: 15,075 shares; 2025Q3: 14,825 shares 14,825$6.63M2.83%-250Timeline
BACBANK OF AMER CORPQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 280,000 shares; 2024Q4: 280,000 shares; 2025Q1: 189,448 shares; 2025Q2: 117,500 shares; 2025Q3: 117,500 shares 117,500$6.06M2.59%0Timeline
NVDANVIDIA CORPORATIONQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 25,650 shares; 2024Q4: 25,650 shares; 2025Q1: 31,909 shares; 2025Q2: 31,534 shares; 2025Q3: 31,834 shares 31,834$5.94M2.54%+300Timeline
MAMASTERCARD INCORPORATEDQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 7,400 shares; 2024Q4: 7,150 shares; 2025Q1: 7,150 shares; 2025Q2: 7,150 shares; 2025Q3: 7,150 shares 7,150$4.07M1.74%0Timeline
TMOTHERMO FISHER SCIENTIFIC INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,250 shares; 2024Q4: 3,250 shares; 2025Q1: 3,250 shares; 2025Q2: 3,250 shares; 2025Q3: 3,250 shares 3,250$1.58M0.67%0Timeline
METAMETA PLATFORMS INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 705 shares; 2024Q4: 705 shares; 2025Q1: 1,725 shares; 2025Q2: 1,725 shares; 2025Q3: 1,800 shares 1,800$1.32M0.57%+75Timeline
NXPINXP SEMICONDUCTORS N VQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 6,135 shares; 2024Q4: 6,135 shares; 2025Q1: 6,035 shares; 2025Q2: 6,035 shares; 2025Q3: 5,600 shares 5,600$1.28M0.55%-435Timeline
AXPAMERICAN EXPRESS COQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 875 shares; 2024Q4: 875 shares; 2025Q1: 2,000 shares; 2025Q2: 2,000 shares; 2025Q3: 2,000 shares 2,000$664K0.28%0Timeline

Sold out in Q3 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
ARMARM HOLDINGS PLC6,214$1.01Mshares

How Q3 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001837320-25-000009 base2025-11-07acceptance time not in the bulk data set