Institutional Manager · CIK 0000897378
CONGRESS ASSET MANAGEMENT CO
BOSTON, MA · File #028-03434
Latest AUM
$14.21B
Positions
381
Top-10 Concentration
35.9%
Filings
10
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 |
|---|---|---|---|---|---|
| NEW | GE Vernova Inc. | GEV | +191,662 | +$125.3M | $0 |
| ADD | Netflix, Inc. | NFLX | +1,241,124 | +$116.4M | -$154.8M |
| REDUCE | Cintas Corporation | CTAS | -571,241 | -$107.4M | -$13.3M |
| REDUCE | Home Depot Inc. | HD | -299,862 | -$103.2M | -$23.9M |
| ADD | IDEXX Laboratories Inc. | 45168D104 | +152,368 | +$103.1M | +$57,965 |
| ADD | Servicenow Inc | NOW | +672,898 | +$103.1M | -$133.9M |
| REDUCE | Gallagher Aj &Co | 363576109 | -392,825 | -$101.7M | -$20.3M |
| REDUCE | Motorola Solutions Inc | MSI | -230,661 | -$88.4M | -$18.5M |
| ADD | Repligen Corporation | RGEN | +527,714 | +$86.5M | +$6.6M |
| NEW | Brinker International, Inc. | 109641100 | +561,025 | +$80.5M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025381 pos · $14.21B
- 13F HOLDINGS REPORTQ/E Sep 2025392 pos · $15.03B
- 13F HOLDINGS REPORTQ/E Jun 2025382 pos · $14.58B
- 13F HOLDINGS REPORTQ/E Mar 20255,840 pos · $13.37B
- 13F HOLDINGS REPORTQ/E Dec 20246,176 pos · $14.80B
- 13F HOLDINGS REPORTQ/E Sep 20245,712 pos · $14.67B
- 13F HOLDINGS REPORTQ/E Jun 20245,824 pos · $13.95B
- 13F HOLDINGS REPORTQ/E Mar 20245,712 pos · $14.02B
- 13F HOLDINGS REPORTQ/E Mar 20245,936 pos · $12.70B
- 13F HOLDINGS REPORTQ/E Dec 20235,984 pos · $11.31B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | NVIDIA Corp. | NVDA | 2,537,072 | $473.2M | 5.89% |
| 2 | Apple Inc. | AAPL | 1,643,557 | $446.8M | 5.56% |
| 3 | Alphabet Inc. | GOOG | 1,066,514 | $333.8M | 4.15% |
| 4 | Microsoft Corp. | MSFT | 643,106 | $311.0M | 3.87% |
| 5 | Broadcom Inc | AVGO | 731,350 | $253.1M | 3.15% |
| 6 | Arista Networks Inc | ANET | 1,758,303 | $230.4M | 2.87% |
| 7 | Goldman Sachs Group, Inc. | GSCE | 256,315 | $225.3M | 2.80% |
| 8 | Amazon.com, Inc. | AMZN | 907,302 | $209.4M | 2.61% |
| 9 | Meta Platforms Inc | META | 305,525 | $201.7M | 2.51% |
| 10 | Visa Inc | V | 567,708 | $199.1M | 2.48% |
| 11 | The TJX Companies Inc. | 872540109 | 1,222,988 | $187.9M | 2.34% |
| 12 | Costco Wholesale Corporation | 22160K105 | 217,475 | $187.5M | 2.33% |
| 13 | Intuitive Surgical Inc. | ISRG | 314,531 | $178.1M | 2.22% |
| 14 | Howmet Aerospace Inc | HWM | 806,017 | $165.2M | 2.06% |
| 15 | Parker-Hannifin Corp. | PH | 186,361 | $163.8M | 2.04% |
| 16 | Eaton Corporation PLC | ETN | 508,130 | $161.8M | 2.01% |
| 17 | Boston Scientific Corporation | BSX | 1,649,958 | $157.3M | 1.96% |
| 18 | Martin Marietta Materials Inc | 573284106 | 239,634 | $149.2M | 1.86% |
| 19 | Curtiss-Wright Corp. | CW | 269,885 | $148.8M | 1.85% |
| 20 | Sterling Infrastructure Inc | STRL | 469,200 | $143.7M | 1.79% |