Institutional Manager · CIK 0001837320
Prospect Hill Management, LLC
SHORT HILLS, NJ · File #028-20602
Latest AUM
$247.4M
Positions
13
Top-10 Concentration
98.4%
Filings
9
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| ADD | NETFLIX INC | NFLX | +55,719 | +$5.2M | -$6.8M |
| EXITED | NXP SEMICONDUCTORS NV | N6596X109 | -5,600 | -$1.3M | $0 |
| ADD | META PLATFORMS INC | META | +630 | +$415,857 | -$133,722 |
| ADD | AMAZON COM INC | AMZN | +1,400 | +$323,148 | +$577,046 |
| REDUCE | APPLE INC | AAPL | -1,100 | -$299,046 | +$8.7M |
| REDUCE | INTUITIVE SURGICAL INC | ISRG | -375 | -$212,385 | +$1.8M |
| REDUCE | THERMO FISHER SCIENTIFIC INC | TMO | -250 | -$144,862 | +$306,897 |
| ADD | TESLA INC | TSLA | +35 | +$15,740 | +$502,085 |
| REDUCE | ALPHABET INC | GOOG | 0 | $0 | +$1.9M |
| REDUCE | ALPHABET INC | GOOG | 0 | $0 | +$2.1M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 202513 pos · $247.4M
- 13F HOLDINGS REPORTQ/E Sep 202514 pos · $234.0M
- 13F HOLDINGS REPORTQ/E Jun 202515 pos · $193.8M
- 13F HOLDINGS REPORTQ/E Mar 202515 pos · $192.0M
- 13F HOLDINGS REPORTQ/E Dec 202416 pos · $227.4M
- 13F HOLDINGS REPORTQ/E Sep 202416 pos · $199.2M
- 13F HOLDINGS REPORTQ/E Jun 202415 pos · $182.2M
- 13F HOLDINGS REPORTQ/E Mar 202415 pos · $155.2M
- 13F HOLDINGS REPORTQ/E Dec 202315 pos · $151.1M
Top 13 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | APPLE INC | AAPL | 505,976 | $137.6M | 55.59% |
| 2 | TESLA INC | TSLA | 100,452 | $45.2M | 18.26% |
| 3 | AMAZON COM INC | AMZN | 52,693 | $12.2M | 4.92% |
| 4 | ALPHABET INC | GOOG | 30,020 | $9.4M | 3.81% |
| 5 | ALPHABET INC | GOOG | 27,370 | $8.6M | 3.46% |
| 6 | INTUITIVE SURGICAL INC | ISRG | 14,450 | $8.2M | 3.31% |
| 7 | BANK OF AMERICA CORP | 060505104 | 117,500 | $6.5M | 2.61% |
| 8 | NVIDIA CORPORATION | NVDA | 31,834 | $5.9M | 2.40% |
| 9 | NETFLIX INC | NFLX | 61,910 | $5.8M | 2.35% |
| 10 | MASTERCARD INCORPORATED | MA | 7,150 | $4.1M | 1.65% |
| 11 | THERMO FISHER SCIENTIFIC INC | TMO | 3,000 | $1.7M | 0.70% |
| 12 | META PLATFORMS INC | META | 2,430 | $1.6M | 0.65% |
| 13 | AMERICAN EXPRESS | AXP | 2,000 | $739,900 | 0.30% |