Institutional Manager · CIK 0001381296
Aureus Asset Management, LLC
BOSTON, MA · File #028-12908
Latest AUM
$1.57B
Positions
201
Top-10 Concentration
45.1%
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 | Nvidia Corporation | NVDA | +213,227 | +$39.8M | -$2,042 |
| ADD | Linde PLC | LIN | +53,887 | +$23.0M | -$34,805 |
| REDUCE | Broadcom Limited | AVGO | -60,472 | -$20.9M | +$3.4M |
| REDUCE | Roper Technologies, Inc. | ROP | -40,413 | -$18.0M | -$2.7M |
| REDUCE | Booking Holdings, Inc. | BKNG | -2,892 | -$15.5M | -$283,614 |
| REDUCE | Oracle Corporation | ORCL-PD | -71,633 | -$14.0M | -$13.2M |
| ADD | Waste Connections, Inc. | WCN | +39,482 | +$6.9M | -$101,985 |
| REDUCE | Healthequity, Inc. | HQY | -72,039 | -$6.6M | -$921,781 |
| NEW | Wesco International, Inc. | 95082P105 | +24,182 | +$5.9M | $0 |
| REDUCE | Paycom Software, Inc. | PAYC | -33,772 | -$5.4M | -$7.3M |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025201 pos · $1.57B
- 13F HOLDINGS REPORTQ/E Sep 2025199 pos · $1.54B
- 13F HOLDINGS REPORTQ/E Jun 2025205 pos · $1.56B
- 13F HOLDINGS REPORTQ/E Mar 2025203 pos · $1.43B
- 13F HOLDINGS REPORTQ/E Dec 2024209 pos · $1.55B
- 13F HOLDINGS REPORTQ/E Sep 2024211 pos · $1.53B
- 13F HOLDINGS REPORTQ/E Jun 2024201 pos · $1.43B
- 13F HOLDINGS REPORTQ/E Mar 2024199 pos · $1.46B
- 13F HOLDINGS REPORTQ/E Dec 2023193 pos · $1.25B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | Microsoft Corporation | MSFT | 199,198 | $96.3M | 6.77% |
| 2 | Alphabet Inc. Class A | GOOG | 298,938 | $93.6M | 6.58% |
| 3 | Apple, Inc. | AAPL | 242,144 | $65.8M | 4.63% |
| 4 | Amazon.Com, Inc. | AMZN | 272,074 | $62.8M | 4.42% |
| 5 | Charles Schwab Corporation | SCHW-PJ | 616,172 | $61.6M | 4.33% |
| 6 | Visa, Inc. | V | 175,140 | $61.4M | 4.32% |
| 7 | Broadcom Limited | AVGO | 151,961 | $52.6M | 3.70% |
| 8 | American Express Company | AXP | 138,309 | $51.2M | 3.60% |
| 9 | Nextera Energy, Inc. | NEE-PW | 594,805 | $47.8M | 3.36% |
| 10 | Meta Platforms, Inc. | META | 72,231 | $47.7M | 3.35% |
| 11 | Waste Connections, Inc. | WCN | 271,386 | $47.6M | 3.35% |
| 12 | Applied Materials, Inc. | 038222105 | 178,276 | $45.8M | 3.22% |
| 13 | Thermo Fisher Scientific, Inc. | TMO | 76,833 | $44.5M | 3.13% |
| 14 | Nvidia Corporation | NVDA | 238,299 | $44.4M | 3.13% |
| 15 | Unitedhealth Group, Inc. | UNH | 130,030 | $42.9M | 3.02% |
| 16 | Blackstone Group L.P. | BX | 250,991 | $38.7M | 2.72% |
| 17 | S&P Global, Inc. | SPGI | 72,157 | $37.7M | 2.65% |
| 18 | Taiwan Semiconductor Manufacturing Co., Ltd. | 874039100 | 120,546 | $36.6M | 2.58% |
| 19 | Wabtec Corporation | 929740108 | 166,015 | $35.4M | 2.49% |
| 20 | Abbott Laboratories | ABLZF | 265,498 | $33.3M | 2.34% |