OAK RIDGE INVESTMENTS LLC — 13F Holdings & Portfolio
CIK 1054554 · latest 13F-HR filed 2026-10-30
OAK RIDGE INVESTMENTS LLC manages $1.68B in 13F-reported U.S. long-equity assets across 173 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are NVDA (13.50%), GOOG (7.93%), AAPL (6.77%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 15 new positions and exited 12; 36 existing positions rose in reported value and 105 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Loading holdings…
AUM
$1.68B
Long-equity book
Holdings
173
Distinct positions
Period
2026-09-30
Filed 2026-10-30
Q/Q Activity
+15 / −12 / ↑36 / ↓105
vs 2026-06-30
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q3 26NVDA13.5% · -4%GOOG7.9% · -5%AAPL6.8% · -4%MSFT4.5% · -5%AVGO4.4% · -6%LLY4.2% · -4%META4.1% · -4%AMD3.3% · -5%MU2.8% · -5%TSLA2.4% · -5%V1.7% · -4%GOOGL1.6% · -4%CRWD1.5% · -4%AMZN1.5% · -4%LRCX1.4% · -5%KLAC1.3% · -4%MA1.3% · -5%NET1.2% · -7%COST1.1% · -5%GEV1.1% · -5%MRVL1.0% · -2%HWM1.0% · -7%CAT1.0% · -5%PLTR0.9% · -3%SNDK0.9% · -5%BTSG0.9% · -3%PWR0.8% · -9%VRT0.7% · -7%CLS0.7% · -6%SNOW0.7% · -5%COHR0.7% · -6%DDOG0.7% · -8%ADI0.6% · -4%MAR0.6% · -4%FROG0.6% · +22%KLIC0.6% · -2%ORLY0.6% · -7%SYK0.5% · -5%BE0.5% · -5%VIAV0.5% · -32%CRDO0.5% · -7%ISRG0.5% · -5%CSCO0.4% · -3%TTWO0.4% · -7%AXON0.4% · -6%DELL0.4% · -5%SMTC0.4% · -24%SITM0.3% · -0%DOCN0.3% · +3%APP0.3% · -6%ECG0.3% · +3%AIT0.3% · +3%SPCX0.3% · -5%HALO0.3% · +1%AAOI0.3% · -12%CON0.3% · +3%ENSG0.3% · -2%SXT0.3% · +4%ROAD0.3% · +3%SNEX0.3% · +54%
Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q2 26 → Q3 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 53.9%Cumulative share of the portfolio held in the largest N positions.
Firm Profile & Key People
As of the firm’s regulatory filing dated May 4, 2026.
Assets Under Management
$1.70B
Discretionary
$1.70B
Employees
13
Accounts
3,920
Address
10 SOUTH LASALLE STREET
SUITE 2130
CHICAGO, IL 60603-1020
SUITE 2130
CHICAGO, IL 60603-1020
Phone
(312) 857-1040
This firm reports 1 disclosure item on its registration.
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| BRINCKERHOFF, JOHN, KANE Control | COO since Dec 2018 | 10–25% | Individual |
| DAVID M. KLASKIN TRUST Control | SHAREHOLDER since Jan 2024 | 25–50% | Domestic Entity |
| KLASKIN, DAVID, MICHAEL Control | MANAGER, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER, MEMBER since Jan 1990 | Less than 5% | Individual |
| MCVICKER, ROBERT, GREGG Control | MANAGER, MEMBER since Mar 2019 | 10–25% | Individual |
| SCAVETTI, JOSEPH, JULIAN | CHIEF COMPLIANCE OFFICER since Oct 2024 | Less than 5% | Individual |
| KLASKIN, DAVID, MICHAEL Control Indirect owner via DAVID M. KLASKIN TRUST | TRUSTEE since Jan 2024 | 75% or more | Individual |
Ownership & leadership changes · 16 filings with changes since Mar 30, 2012
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
Mar 16, 2026 filing
- No longer listedDAVID M. KLASKIN GST TRUST DATED 12/16/12 · SHAREHOLDER · 10–25% · listed since Nov 2025
- No longer listedKLASKIN, DAVID, MICHAEL · TRUSTEE · 75% or more · indirect via DAVID M. KLASKIN GST TRUST DATED 12/16/12 · control person · listed since Dec 2012
- ChangedBRINCKERHOFF, JOHN, KANE · ownership 5–10% → 10–25%
Dec 2, 2025 filing
- No longer listedCUMMINS, NEIL, ANTHONY · MEMBER · 10–25% · listed since Oct 2014
- No longer listedGOODWIN, MARK, DAVID · MANAGER · Less than 5% · control person · listed since Sep 2015
- No longer listedNSI HOLDCO LLC · MEMBER · 10–25% · listed since Jul 2018
- No longer listedPETERS, JOHN, EDWARD · MEMBER · 5–10% · listed since Jul 2002
- AddedDAVID M. KLASKIN GST TRUST DATED 12/16/12 · SHAREHOLDER · 10–25%
- AddedKLASKIN, DAVID, MICHAEL · TRUSTEE · 75% or more · indirect via DAVID M. KLASKIN GST TRUST DATED 12/16/12 · control person
Mar 26, 2025 filing
- AddedDAVID M. KLASKIN TRUST · SHAREHOLDER · 25–50% · control person
- AddedKLASKIN, DAVID, MICHAEL · TRUSTEE · 75% or more · indirect via DAVID M. KLASKIN TRUST · control person
- ChangedBRINCKERHOFF, JOHN, KANE · ownership Less than 5% → 5–10%
- ChangedKLASKIN, DAVID, MICHAEL · ownership 25–50% → Less than 5%
- ChangedMCVICKER, ROBERT, GREGG · ownership Less than 5% → 10–25%
Oct 11, 2024 filing
- No longer listedDOLAN, ERIK, J · CCO · Less than 5% · listed since Jul 2023
- AddedSCAVETTI, JOSEPH, JULIAN · CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 13, 2024 filing
- No longer listedMOLOTSKY, ALAN, EUGENE · CFO · Less than 5% · listed since Jul 2018
Aug 1, 2023 filing
- No longer listedSCARAMUCCI, ADREA, ANN · CCO · Less than 5% · listed since Apr 2021
- AddedDOLAN, ERIK, J · CCO · Less than 5%
Jun 29, 2021 filing
- No longer listedKAILIN, KENNETH, SCOTT · CHIEF COMPLIANCE OFFICER, EXECUTIVE VICE PRESIDENT, MEMBER · Less than 5% · control person · listed since Mar 2019
- No longer listedNORTH SQUARE INVESTMENTS, LLC · MEMBER · 10–25% · listed since Jul 2018
- AddedBRINCKERHOFF, JOHN, KANE · COO · Less than 5% · control person
- AddedNSI HOLDCO LLC · MEMBER · 10–25%
- AddedSCARAMUCCI, ADREA, ANN · CCO · Less than 5%
- Listed againMOLOTSKY, ALAN, EUGENE · CFO · Less than 5%
- Listed againPETERS, JOHN, EDWARD · MEMBER · 5–10%
Apr 1, 2020 filing
- AddedNORTH SQUARE INVESTMENTS, LLC · MEMBER · 10–25%
- Listed againCUMMINS, NEIL, ANTHONY · MEMBER · 10–25%
Mar 29, 2019 filing
- No longer listedCUMMINS, NEIL, ANTHONY · MANAGER, CHAIRMAN · 10–25% · control person · listed since Oct 2014
- No longer listedGASPAR, DAVID, JOHN · CHIEF OPERATIONS & INFORMATION OFFICER, EXECUTIVE V.P. · Less than 5% · control person · listed since Jan 2005
- No longer listedMOLOTSKY, ALAN, EUGENE · MANAGER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, EXECUTIVE V.P. · Less than 5% · control person · listed since Jan 2005
- No longer listedPETERS, JOHN, EDWARD · VICE CHAIRMAN · 5–10% · listed since Mar 2005
- AddedKAILIN, KENNETH, SCOTT · CHIEF COMPLIANCE OFFICER, EXECUTIVE VICE PRESIDENT, MEMBER · Less than 5% · control person
- AddedMCVICKER, ROBERT, GREGG · MANAGER, MEMBER · Less than 5% · control person
- ChangedGOODWIN, MARK, DAVID · title MANAGER, PRESIDENT, CHIEF OPERATING OFFICER → MANAGER; ownership 5–10% → Less than 5%
- ChangedKLASKIN, DAVID, MICHAEL · title MANAGER, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER → MANAGER, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER, MEMBER
Mar 30, 2018 filing
- ChangedGOODWIN, MARK, DAVID · title CHIEF OPERATING OFFICER, EXECUTIVE V.P., MANAGER → MANAGER, PRESIDENT, CHIEF OPERATING OFFICER
Older changes (7 more filings)
Mar 30, 2017 filing
- No longer listedRUDZINSKI, SUSAN, SCHWARZ · CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Dec 2014
- ChangedGOODWIN, MARK, DAVID · title CHIEF OPERATING OFFICER, EXECUTIVE V.P. → CHIEF OPERATING OFFICER, EXECUTIVE V.P., MANAGER; ownership Less than 5% → 5–10%
- ChangedKLASKIN, DAVID, MICHAEL · ownership 50–75% → 25–50%
- ChangedMOLOTSKY, ALAN, EUGENE · title MANAGER, CHIEF FINANCIAL OFFICER, EXECUTIVE V.P. → MANAGER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, EXECUTIVE V.P.
Mar 9, 2016 filing
- Listed againGOODWIN, MARK, DAVID · CHIEF OPERATING OFFICER, EXECUTIVE V.P. · Less than 5% · control person
- ChangedGASPAR, DAVID, JOHN · title CHIEF OPERATIONS OFFICER, EXECUTIVE V.P. → CHIEF OPERATIONS & INFORMATION OFFICER, EXECUTIVE V.P.
- ChangedPETERS, JOHN, EDWARD · no longer a control person
Mar 16, 2015 filing
- ChangedKLASKIN, DAVID, MICHAEL · ownership 25–50% → 50–75%
Jan 2, 2015 filing
- AddedRUDZINSKI, SUSAN, SCHWARZ · CHIEF COMPLIANCE OFFICER · Less than 5%
- ChangedMOLOTSKY, ALAN, EUGENE · title MANAGER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, EXECUTIVE V.P. → MANAGER, CHIEF FINANCIAL OFFICER, EXECUTIVE V.P.
Oct 22, 2014 filing
- No longer listedGOODWIN, MARK, DAVID · MANAGER · Less than 5% · control person · listed since Mar 2007
- No longer listedHARRINGTON, MICHAEL, EDWARD · VICE CHAIRMAN · Less than 5% · control person · listed since Jul 2013
- No longer listedPIONEER GLOBAL ASSET MANAGEMENT S.P.A. · OWNER · 75% or more · indirect via PIONEER INVESTMENT MANAGEMENT USA, INC. · control person · listed since Oct 2001
- No longer listedPIONEER INSTITUTIONAL ASSET MANAGEMENT, INC. · OWNER · 25–50% · control person · listed since Apr 2006
- No longer listedPIONEER INVESTMENT MANAGEMENT USA INC. · OWNER · 75% or more · indirect via PIONEER INSTITUTIONAL ASSET MANAGEMENT INC. · control person · listed since Apr 2006
- No longer listedUNICREDITO ITALIANO S.P.A. · OWNER · 75% or more · indirect via PIONEER GLOBAL ASSET MANAGEMENT S.P.A. · control person · listed since Oct 2001
- No longer listedWILLIAMS, CHRISTOPHER, LEE · PRESIDENT · Less than 5% · control person · listed since Jul 2013
- ChangedCUMMINS, NEIL, ANTHONY · title CHAIRMAN → MANAGER, CHAIRMAN; ownership Less than 5% → 10–25%
Mar 31, 2014 filing
- AddedCUMMINS, NEIL, ANTHONY · CHAIRMAN · Less than 5% · control person
- AddedWILLIAMS, CHRISTOPHER, LEE · PRESIDENT · Less than 5% · control person
- ChangedHARRINGTON, MICHAEL, EDWARD · title PRESIDENT → VICE CHAIRMAN
- ChangedKLASKIN, DAVID, MICHAEL · title MANAGER, CHAIRMAN, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER → MANAGER, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER
Mar 30, 2012 filing (earliest on record)
- ListedGASPAR, DAVID, JOHN · CHIEF OPERATIONS OFFICER, EXECUTIVE V.P. · Less than 5% · control person
- ListedGOODWIN, MARK, DAVID · MANAGER · Less than 5% · control person
- ListedHARRINGTON, MICHAEL, EDWARD · PRESIDENT · Less than 5% · control person
- ListedKLASKIN, DAVID, MICHAEL · MANAGER, CHAIRMAN, CHIEF EXECUTIVE OFFICER AND CHIEF INVESTMENT OFFICER · 25–50% · control person
- ListedMOLOTSKY, ALAN, EUGENE · MANAGER, CHIEF FINANCIAL OFFICER, CHIEF COMPLIANCE OFFICER, EXECUTIVE V.P. · Less than 5% · control person
- ListedPETERS, JOHN, EDWARD · VICE CHAIRMAN · 5–10% · control person
- ListedPIONEER GLOBAL ASSET MANAGEMENT S.P.A. · OWNER · 75% or more · indirect via PIONEER INVESTMENT MANAGEMENT USA, INC. · control person
- ListedPIONEER INSTITUTIONAL ASSET MANAGEMENT, INC. · OWNER · 25–50% · control person
- ListedPIONEER INVESTMENT MANAGEMENT USA INC. · OWNER · 75% or more · indirect via PIONEER INSTITUTIONAL ASSET MANAGEMENT INC. · control person
- ListedUNICREDITO ITALIANO S.P.A. · OWNER · 75% or more · indirect via PIONEER GLOBAL ASSET MANAGEMENT S.P.A. · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- NVIDIA CORPORATION$20.6M +10.0%
- MICROSOFT CORP$17.9M +31.2%
- META PLATFORMS INC$13.0M +23.1%
- APPLE INC$10.4M +10.0%
- CROWDSTRIKE HLDGS INC$6.4M +32.6%
Top Trims
- KLA CORP-$13.7M -38.1%
- ALPHABET INC-$11.7M -8.1%
- BROADCOM INC-$10.9M -13.0%
- TESLA INC-$10.0M -19.6%
- LAM RESEARCH CORP-$9.1M -28.1%
New Positions
- ENERSYS$3.7M
- LAUREATE ED INC$3.4M
- TENABLE HLDGS INC$3.2M
- HA SUSTAINABLE INFRA CAP INC$2.9M
- 10X GENOMICS INC$2.4M
Exited Positions
- SAIA INC$2.8M
- LEMAITRE VASCULAR INC$2.7M
- OLLIES BARGAIN OUTLET HLDGS$2.6M
- D-WAVE QUANTUM INC$2.1M
- HURON CONSULTING GROUP INC$1.4M
OAK RIDGE INVESTMENTS LLC Holdings (2026-09-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | NVIDIA CORPORATION | NVDA | 67066G104 | $226.8M | 13.50% | 993,182 | SH |
| 2 | ALPHABET INC | GOOG | 02079K107 | $133.3M | 7.93% | 391,075 | SH |
| 3 | APPLE INC | AAPL | 037833100 | $113.7M | 6.77% | 341,443 | SH |
| 4 | MICROSOFT CORP | MSFT | 594918104 | $75.0M | 4.46% | 146,279 | SH |
| 5 | BROADCOM INC | AVGO | 11135F101 | $73.3M | 4.36% | 208,649 | SH |
| 6 | ELI LILLY & CO | LLY | 532457108 | $71.1M | 4.23% | 61,411 | SH |
| 7 | META PLATFORMS INC | META | 30303M102 | $69.1M | 4.11% | 95,221 | SH |
| 8 | ADVANCED MICRO DEVICES INC | AMD | 007903107 | $55.8M | 3.32% | 91,272 | SH |
| 9 | MICRON TECHNOLOGY INC | MU | 595112103 | $47.2M | 2.81% | 44,324 | SH |
| 10 | TESLA INC | TSLA | 88160R101 | $41.1M | 2.44% | 115,701 | SH |
| 11 | VISA INC | V | 92826C839 | $28.7M | 1.71% | 79,819 | SH |
| 12 | ALPHABET INC | GOOGL | 02079K305 | $27.6M | 1.64% | 80,251 | SH |
| 13 | CROWDSTRIKE HLDGS INC | CRWD | 22788C105 | $25.9M | 1.54% | 97,937 | SH |
| 14 | AMAZON COM INC | AMZN | 023135106 | $24.5M | 1.46% | 98,400 | SH |
| 15 | LAM RESEARCH CORP | LRCX | 512807306 | $23.4M | 1.39% | 71,175 | SH |
| 16 | KLA CORP | KLAC | 482480100 | $22.2M | 1.32% | 113,994 | SH |
| 17 | MASTERCARD INCORPORATED | MA | 57636Q104 | $21.6M | 1.29% | 39,252 | SH |
| 18 | CLOUDFLARE INC | NET | 18915M107 | $20.1M | 1.19% | 57,803 | SH |
| 19 | COSTCO WHOLESALE CORPORATION | COST | 22160K105 | $19.2M | 1.14% | 21,100 | SH |
| 20 | GE VERNOVA INC | GEV | 36828A101 | $17.8M | 1.06% | 18,748 | SH |
| 21 | MARVELL TECHNOLOGY INC | MRVL | 573874104 | $16.6M | 0.99% | 62,741 | SH |
| 22 | HOWMET AEROSPACE INC | HWM | 443201108 | $16.6M | 0.98% | 73,182 | SH |
| 23 | CATERPILLAR INC | CAT | 149123101 | $16.0M | 0.95% | 19,792 | SH |
| 24 | PALANTIR TECHNOLOGIES INC | PLTR | 69608A108 | $15.7M | 0.93% | 83,747 | SH |
| 25 | SANDISK CORP | SNDK | 80004C200 | $15.4M | 0.92% | 8,873 | SH |
| 26 | BRIGHTSPRING HEALTH SVCS INC | BTSG | 10950A106 | $14.4M | 0.86% | 254,609 | SH |
| 27 | QUANTA SVCS INC | PWR | 74762E102 | $12.8M | 0.76% | 19,879 | SH |
| 28 | VERTIV HOLDINGS CO | VRT | 92537N108 | $12.4M | 0.74% | 51,505 | SH |
| 29 | CELESTICA INC | CLS | 15101Q207 | $12.0M | 0.71% | 33,215 | SH |
| 30 | SNOWFLAKE INC | SNOW | 833445109 | $11.8M | 0.70% | 34,782 | SH |
| 31 | COHERENT CORP | COHR | 19247G107 | $11.4M | 0.68% | 39,550 | SH |
| 32 | DATADOG INC | DDOG | 23804L103 | $11.1M | 0.66% | 40,370 | SH |
| 33 | ANALOG DEVICES INC | ADI | 032654105 | $10.8M | 0.64% | 27,136 | SH |
| 34 | MARRIOTT INTL INC NEW | MAR | 571903202 | $9.8M | 0.58% | 27,549 | SH |
| 35 | JFROG LTD | FROG | M6191J100 | $9.5M | 0.57% | 97,968 | SH |
| 36 | KULICKE & SOFFA INDS INC | KLIC | 501242101 | $9.4M | 0.56% | 99,460 | SH |
| 37 | OREILLY AUTOMOTIVE INC | ORLY | 67103H107 | $9.3M | 0.55% | 108,994 | SH |
| 38 | STRYKER CORPORATION | SYK | 863667101 | $8.8M | 0.52% | 31,899 | SH |
| 39 | BLOOM ENERGY CORP | BE | 093712107 | $8.5M | 0.51% | 30,655 | SH |
| 40 | VIAVI SOLUTIONS INC | VIAV | 925550105 | $8.2M | 0.49% | 194,822 | SH |
| 41 | CREDO TECHNOLOGY GROUP HOLDI | CRDO | G25457105 | $7.9M | 0.47% | 40,500 | SH |
| 42 | INTUITIVE SURGICAL INC | ISRG | 46120E602 | $7.7M | 0.46% | 19,004 | SH |
| 43 | CISCO SYS INC | CSCO | 17275R102 | $7.0M | 0.41% | 64,583 | SH |
| 44 | TAKE-TWO INTERACTIVE SOFTWAR | TTWO | 874054109 | $6.9M | 0.41% | 33,040 | SH |
| 45 | AXON ENTERPRISE INC | AXON | 05464C101 | $6.5M | 0.39% | 15,371 | SH |
| 46 | DELL TECHNOLOGIES INC | DELL | 24703L202 | $6.2M | 0.37% | 11,610 | SH |
| 47 | SEMTECH CORP | SMTC | 816850101 | $6.2M | 0.37% | 34,910 | SH |
| 48 | SITIME CORP | SITM | 82982T106 | $5.7M | 0.34% | 8,689 | SH |
| 49 | DIGITALOCEAN HLDGS INC | DOCN | 25402D102 | $5.5M | 0.33% | 41,603 | SH |
| 50 | APPLOVIN CORP | APP | 03831W108 | $5.4M | 0.32% | 18,556 | SH |
Filing History
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-09-30 | 2026-10-30 | $1.68B | 173 | 0001172661-26-004768 |
| 2026-06-30 | 2026-07-21 | $1.77B | 170 | 0001172661-26-002720 |
| 2026-03-31 | 2026-04-30 | $1.51B | 181 | 0001172661-26-001576 |
| 2025-12-31 | 2026-01-23 | $1.65B | 178 | 0001172661-26-000295 |
Filer Information
Address
10 SOUTH LASALLE STREETSUITE 2130
CHICAGO, IL 60603
Phone
(312) 857-1040
Filing Manager
OAK RIDGE INVESTMENTS LLC
Chicago, IL
Signatory
John Brinckerhoff
Chief Operating Officer