Institutional Manager · CIK 0001056559
NORTH STAR ASSET MANAGEMENT INC
NEENAH, WI · File #028-06858
Latest AUM
$2.48B
Positions
443
Top-10 Concentration
36.7%
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 |
|---|---|---|---|---|---|
| NEW | THERMO FISHER SCIENTIFIC | TMO | +61,749 | +$35.8M | -$32 |
| REDUCE | HOLOGIC | HOLX | -102,494 | -$7.6M | +$1.8M |
| ADD | SERVICENOW | NOW | +37,390 | +$5.7M | -$4.7M |
| ADD | CADENCE DESIGN SYSTEMS | CDNS | +17,799 | +$5.6M | -$7,736 |
| ADD | ILLUMINA | ILMN | +38,220 | +$5.0M | +$5.3M |
| REDUCE | SYSCO CORPORATION | SYY | -61,003 | -$4.5M | -$1.2M |
| REDUCE | QUALCOMM | QCOM | -25,617 | -$4.4M | +$121,082 |
| REDUCE | PRICE T ROWE GROUP | TROW | -42,698 | -$4.4M | -$40,953 |
| ADD | VERIZON COMMUNICATIONS | VZ | +74,882 | +$3.0M | -$161 |
| NEW | TRADEWEB MARKETS | 892672106 | +26,361 | +$2.8M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025443 pos · $2.48B
- 13F HOLDINGS REPORTQ/E Sep 2025445 pos · $2.47B
- 13F HOLDINGS REPORTQ/E Jun 2025438 pos · $2.36B
- 13F HOLDINGS REPORTQ/E Mar 2025420 pos · $2.19B
- 13F HOLDINGS REPORTQ/E Dec 2024417 pos · $2.26B
- 13F HOLDINGS REPORTQ/E Sep 2024418 pos · $2.23B
- 13F HOLDINGS REPORTQ/E Jun 2024428 pos · $2.11B
- 13F HOLDINGS REPORTQ/E Mar 2024435 pos · $2.12B
- 13F HOLDINGS REPORTQ/E Dec 2023414 pos · $1.74B
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | APPLE | AAPL | 342,798 | $93.2M | 5.47% |
| 2 | MICROSOFT | MSFT | 157,132 | $76.0M | 4.46% |
| 3 | SCHWAB US BROAD MKT ETF | 808524102 | 2,676,232 | $70.2M | 4.12% |
| 4 | ALPHABET CL C | GOOG | 214,435 | $67.3M | 3.95% |
| 5 | SPDR S&P LARGE CAP 500 | 78464A854 | 732,162 | $58.7M | 3.44% |
| 6 | VANGUARD TTL STK MKT ETF | 922908769 | 168,221 | $56.4M | 3.31% |
| 7 | SS&C TECHNOLOGIES | 78467j100 | 607,939 | $53.1M | 3.12% |
| 8 | AMAZON.COM | AMZN | 224,679 | $51.9M | 3.04% |
| 9 | VISA | V | 141,728 | $49.7M | 2.92% |
| 10 | CHARLES SCHWAB | SCHW-PJ | 489,802 | $48.9M | 2.87% |
| 11 | ABBOTT LABS | ABLZF | 316,358 | $39.6M | 2.32% |
| 12 | BROADCOM | AVGO | 108,247 | $37.5M | 2.20% |
| 13 | AMETEK | AME | 177,680 | $36.5M | 2.14% |
| 14 | ABBVIE | ABBV | 157,694 | $36.0M | 2.11% |
| 15 | THERMO FISHER SCIENTIFIC | TMO | 61,749 | $35.8M | 2.10% |
| 16 | STRYKER | SYK | 101,686 | $35.7M | 2.10% |
| 17 | ASML HOLDINGS | ASMLF | 33,284 | $35.6M | 2.09% |
| 18 | NVIDIA | NVDA | 190,131 | $35.5M | 2.08% |
| 19 | PRINCIPAL FINL GROUP | 74251v102 | 388,664 | $34.3M | 2.01% |
| 20 | INTUIT | INTU | 50,677 | $33.6M | 1.97% |