Institutional Manager · CIK 0001054554
OAK RIDGE INVESTMENTS LLC
Chicago, IL · File #028-06668
Latest AUM
$1.65B
Positions
178
Top-10 Concentration
67.6%
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 |
|---|---|---|---|---|---|
| ADD | NETFLIX INC | NFLX | +218,607 | +$20.5M | -$24.5M |
| EXITED | T-MOBILE US INC | 872590104 | -63,366 | -$15.2M | $0 |
| ADD | NVIDIA CORPORATION | NVDA | +72,457 | +$13.5M | -$77,669 |
| NEW | GE VERNOVA INC | GEV | +18,975 | +$12.4M | $0 |
| ADD | MICROSOFT CORP | MSFT | +23,602 | +$11.4M | -$11.3M |
| ADD | UBER TECHNOLOGIES INC | UBER | +132,500 | +$10.8M | -$72,764 |
| ADD | APPLE INC | AAPL | +39,441 | +$10.7M | +$9.5M |
| EXITED | ARISTA NETWORKS INC | 040413205 | -68,839 | -$10.0M | $0 |
| NEW | BRIGHTSPRING HEALTH SVCS INC | 10950A106 | +252,722 | +$9.5M | $0 |
| EXITED | INTERCONTINENTAL EXCHANGE IN | 45866F104 | -47,620 | -$8.0M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORTQ/E Dec 2025178 pos · $1.65B
- 13F HOLDINGS REPORTQ/E Sep 2025179 pos · $1.55B
- 13F HOLDINGS REPORTQ/E Jun 2025171 pos · $1.39B
- 13F HOLDINGS REPORTQ/E Mar 2025163 pos · $1.20B
- 13F HOLDINGS REPORTQ/E Dec 2024167 pos · $1.27B
- 13F HOLDINGS REPORT (Amended)Q/E Sep 2024146 pos · $1.05B
- 13F HOLDINGS REPORTQ/E Sep 2024152 pos · $1.15B
- 13F HOLDINGS REPORTQ/E Jun 2024146 pos · $1.05B
- 13F HOLDINGS REPORTQ/E Mar 2024143 pos · $991.0M
- 13F HOLDINGS REPORTQ/E Dec 2023142 pos · $783.6M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | NVDA | 1,043,317 | $194.6M | 13.46% |
| 2 | MICROSOFT CORP | MSFT | 353,786 | $171.1M | 11.83% |
| 3 | APPLE INC | AAPL | 592,599 | $161.1M | 11.14% |
| 4 | AMAZON COM INC | AMZN | 352,857 | $81.4M | 5.63% |
| 5 | ALPHABET INC | GOOG | 256,717 | $80.6M | 5.57% |
| 6 | BROADCOM INC | AVGO | 230,433 | $79.8M | 5.52% |
| 7 | ELI LILLY & CO | LLY | 65,782 | $70.7M | 4.89% |
| 8 | META PLATFORMS INC | META | 102,185 | $67.5M | 4.67% |
| 9 | TESLA INC | TSLA | 88,813 | $39.9M | 2.76% |
| 10 | VISA INC | V | 88,244 | $30.9M | 2.14% |
| 11 | ALPHABET INC | GOOG | 79,096 | $24.8M | 1.71% |
| 12 | MASTERCARD INCORPORATED | MA | 42,168 | $24.1M | 1.66% |
| 13 | ORACLE CORP | ORCL-PD | 118,037 | $23.0M | 1.59% |
| 14 | NETFLIX INC | NFLX | 240,807 | $22.6M | 1.56% |
| 15 | KLA CORP | KLAC | 17,348 | $21.1M | 1.46% |
| 16 | COSTCO WHSL CORP NEW | 22160K105 | 22,117 | $19.1M | 1.32% |
| 17 | PALANTIR TECHNOLOGIES INC | PLTR | 89,659 | $15.9M | 1.10% |
| 18 | CELESTICA INC | CLS | 53,058 | $15.7M | 1.08% |
| 19 | ECOLAB INC | ECL | 56,083 | $14.7M | 1.02% |
| 20 | TRANSDIGM GROUP INC | TDG | 9,775 | $13.0M | 0.90% |