| | Computer Software | San Jose | CA | > $1B |
| | Internet | New York | NY | $100 - 250M |
| | Internet | Seattle | WA | $10 - 50M |
| AutodeskAutodesk | 3D Design, Engineering & Entertainment Software | Computer Software | San Rafael | CA | > $1B |
| | Automotive | Wimbledon | Greater Manchester | > $1B |
| | Media Production | New York | NY | $500M - 1B |
| | Internet | Chicago | IL | $100 - 250M |
| | Internet | San Francisco | CA | $100 - 250M |
| | Insurance | Hartford | CT | > $1B |
| | Consumer Services | Melbourne | VIC | > $1B |
| ALEKS CorporationALEKS -- Assessment and Learning, K-12, Higher Education, Automated Tutor, Math | E-Learning | Irvine | CA | $10 - 50M |
| AcronisBackup Software & Data Protection Solutions - Acronis | Computer Software | Burlington | MA | $100 - 250M |
| | Nonprofit Organization Management | Washington | DC | > $1B |
| AbletonMusic production with Live and Push | Ableton | Computer Software | Arcadia | CA | $10 - 50M |
| Artnet
Fine Art, Decorative Art, and Design - The Art World Online: artnet
| Fine Art | New York | NY | $10 - 50M |
| ArbiterSportsGame Officials Management Platform - It's How the Game is Played | Computer Software | Sandy | UT | $1 - 10M |
| AuctionZipFind Live & Online Auctions for Antiques, Art, Cars & More at AuctionZip.com | Internet | | | $1 - 10M |
| Adjustadjust | mobile app tracking | Marketing and Advertising | Berlin | Berlin | $1 - 10M |
| ArchitonicArchitonic | The platform for Architecture & Design | Marketing and Advertising | Z | | $1 - 10M |
| Alarm.com
Alarm.com - Home Security Systems, Alarm Monitoring, Video & Energy Management.
| Consumer Electronics | Vienna | VA | $100 - 250M |
| Achieve3000Differentiated Instruction Solutions | Achieve3000 | Computer Software | Lakewood | NJ | $50 - 100M |
| | Information Technology and Services | Lake Mary | FL | $100 - 250M |
| ArticulateE-Learning Software and Authoring Tools - Articulate | Computer Software | New York | NY | $10 - 50M |
| | Consumer Goods | Denver | CO | $10 - 50M |
| Apex LearningGraduate All Students Ready for College and Career Success | Apex Learning | E-Learning | Seattle | WA | $100 - 250M |
| AnyMeetingOnline Meetings | Video Conferencing | Webinar Services | Computer Software | Huntington Beach | CA | $1 - 10M |
| | Computer Games | Santa Monica | CA | > $1B |
| ACTIVE NetworkOnline Event Registration & Management Software by ACTIVE Network | Computer Software | Dallas | TX | > $1B |
| AcunetixWebsite security - keep in check with Acunetix | Information Technology and Services | Kingston Upon Thames | | $1 - 10M |
| | Financial Services | Dublin | | $1 - 10M |
| AltiumPCB Design Software | Innovation For PCB Design | PCB Tools | Computer Software | Carlsbad | CA | $100 - 250M |
| AdestraCustomer-driven marketing. Fueled by email. | Marketing and Advertising | Oxford | ENG | $1 - 10M |
| | Financial Services | San Francisco | CA | $1 - 10M |
| | Automotive | Gaydon | England | > $1B |
| | Nonprofit Organization Management | WASHINGTON | DC | $50 - 100M |
| | Computer Software | Chicago | IL | > $1B |
| | Computer Software | Livonia | MI | $10 - 50M |
| AbbottAbbott | Global Healthcare & Research | Hospital & Health Care | North Chicago | IL | > $1B |
| ALMAMeet Alma | Transforming K-12 Data into Insight | Information Technology and Services | Portland | OR | $1 - 10M |
| | Building Materials | Bayport | MN | > $1B |
| | Wireless | Sunnyvale | CA | $100 - 250M |
| | Information Services | Concord | MA | |
| | Higher Education | San Angelo | TX | $50 - 100M |
| | Internet | Seattle | WA | $1 - 10M |
| | Information Technology and Services | Brooklyn | NY | $250 - 500M |
| ARRISARRIS | Invent the Future | Telecommunications | Wayne | PA | $10 - 50M |
| AlteryxLeader in Self-Service Data Analytics | Alteryx | Information Technology and Services | Irvine | CA | $1 - 10M |
| Air LiquideAir Liquide | The world leader in gases, technologies and services for Industry and Health | Chemicals | Paris | | > $1B |
| Addison LeeAddison Lee: more than a London taxi | Book Now | Logistics and Supply Chain | London | England | > $1B |
| | Higher Education | Los Angeles | CA | $1 - 10M |
| | Staffing and Recruiting | Glendale | CA | > $1B |
| ActivTradesOnline Forex and CFD Trading | ActivTrades.com | Financial Services | London | | $10 - 50M |
| Awana.Awana | Children's & Youth Ministry Curriculum | Religious Institutions | Streamwood | IL | $50 - 100M |
| | E-Learning | Little Falls | MN | $1 - 10M |
| AcquisioAcquisio | Performance Media Solution | Marketing and Advertising | Brossard | QC | $1 - 10M |
| | Higher Education | San Francisco | CA | $100 - 250M |
| Avery DennisonCorporate - Global Packaging Trends in Consumer Goods Packaging | Avery Dennison | Packaging and Containers | Glendale | CA | > $1B |
| ACI WorldwideACI Worldwide: The Leader In Banking & Payment Solutions | Computer Software | Naples | FL | $500M - 1B |
| ABM IndustriesBuilding Maintenance and Facility Services from ABM | ABM | Facilities Services | New York | NY | > $1B |
| AppirioA Different Experience - Appirio | Information Technology and Services | San Francisco | CA | $50 - 100M |
| | Retail | Vashon | WA | $0 - 1M |
| | Higher Education | Adelaide | SA | $10 - 50M |
| | Nonprofit Organization Management | New York | NY | $1 - 10M |
| | Information Technology and Services | | | $250 - 500M |
| | Publishing | Sydney | | $1 - 10M |
| ApttusApttus | The World Leader in Quote-to-Cash Software | Computer Software | San Mateo | CA | $10 - 50M |
| AthnetFind College Athletic Scholarships and Get Recruited with Athnet Sports Recruiting | Marketing and Advertising | San Francisco | CA | $0 - 1M |
| AdicioAdicio - Innovative Classified Advertising Software | Internet | Carlsbad | CA | $1 - 10M |
| AGCO CorporationAGCO: Challenger, Fendt, GSI, Massey Ferguson, Valtra Farm Equipment | Machinery | Duluth | GA | > $1B |
| | Management Consulting | Vienna | VA | $1 - 10M |
| | Computer Software | San Francisco | CA | $0 - 1M |
| | Computer Software | Santa Clara | CA | $250 - 500M |
| | Marketing and Advertising | London | | $10 - 50M |
| AVOXIAVOXI Cloud Communications - Business VoIP Services | Telecommunications | | | $1 - 10M |
| AMP TradingFutures Broker | AMP Futures | AMP Clearing AMP Futures | Financial Services | Chicago | IL | $10 - 50M |
| American TowerWireless Tower Communication Operator, Cell Site Lease Solutions | americantower.com | Telecommunications | Boston | MA | > $1B |
| AccelaAccela, Inc. | Better Government through Civic Engagement | Computer Software | San Ramon | CA | $100 - 250M |
| | Biotechnology | Santa Clara | CA | > $1B |
| APM MusicAPM Music - Production Music Library & Custom Music House | Music | New York | NY | $10 - 50M |
| ApptioApptio - IT Financial Transparency, Benchmarking and Metrics | Computer Software | Bellevue | WA | $50 - 100M |
| | Internet | Denver | CO | $10 - 50M |
| | Sports | Saint Leonards | | $0 - 1M |
| ARIARI Global Fleet Management Services | Automotive | Mount Laurel | NJ | > $1B |
| | Financial Services | New Delhi | | $50 - 100M |
| ADS SecuritiesSophisticated trading and investment solutions from Abu Dhabi | ADS Securities | Financial Services | | | $10 - 50M |
| | Computer Software | Redwood City | CA | $100 - 250M |
| | Higher Education | ROSARIO | SANTA FE | > $1B |
| | Computer Software | Chelmsford | MA | $500M - 1B |
| Accedo.tvAccedo – ACCEDO TRANSFORMING THE VIDEO EXPERIENCE | Information Technology and Services | Stockholm | Stockholms ln | $1 - 10M |
| | Public Relations and Communications | Paris | | $50 - 100M |
| | Research | Washington | DC | $0 - 1M |
| | E-Learning | Orem | UT | $1 - 10M |
| | Hospital & Health Care | Berlin | | $10 - 50M |
| | Computer Software | Wien | Wien | $50 - 100M |
| AddeparAddepar | Investment Management Platform for Investors and Advisors | Computer Software | Mountain View | CA | $0 - 1M |
| | Computer Software | Dedham | England | $10 - 50M |
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Florida Web Design Company | Atilus | Internet | Bonita Springs | FL | $1 - 10M |
| | Computer Software | Foster City | CA | $10 - 50M |
| Alert Logicitemprop='name'>
Security As A Service – Cloud Security Provider | Alert Logic
| Computer & Network Security | Houston | TX | $50 - 100M |
| | Internet | Mountain View | CA | $10 - 50M |