The following companies attended Virtual Career Expo 2021.
| AARP | GBH / WGBH News (Boston) | Sinclair Broadcast Group |
| ABC (The Walt Disney Company) | Grist | Spectrum Networks |
| ABC News | GZERO Media | Spectrum News |
| Ad Age | Harper's Magazine | Sports Illustrated |
| Al-Monitor | HealthDay | Stacker |
| American Public Media Group / Minnesota Public Radio | Hearst Magazines | Stitcher |
| Architectural Record | Hearst Television | Story Syndicate |
| Arizent | Hearst Television/DIGITAL | TEGNA / WTIC-TV Fox 61 |
| At Will Media | Honolulu Civil Beat | TEGNA Inc. |
| Atlas Obscura | HousingWire | TELEMUNDO (NBCUniversal) |
| Audible | Hubbard Broadcasting / KAAL-TV (Rochester, Minn.) | The 19th |
| Axios | Ideastream | The Associated Press |
| BBC (Washington, D.C.) | Insider Inc | The Atlantic |
| BBC News | Insurance Insider / Inside P&C | The Berkshire Eagle |
| BBC News | World News America (Washington, D.C.) | Inverse (Bustle Digital Group) | The Block |
| Blavity Inc. | ITN Productions | The Caravan |
| Bloomberg | KPCC/LAist (American Public Media Group) | THE CITY |
| Blue Chalk Media | KPTV / KPDX-TV (Portland. Ore. & Vancouver, Wash.) (Meredith Corp.) | The Counter |
| Brown Institute for Media Innovation | KVVU-TV FOX 5 (Las Vegas) (Meredith Corp.) | The Daily Beast |
| Brut Media | Los Angeles Times | The E. W. Scripps Company (television/digital) |
| Bustle Digital Group | McClatchy | The Economist |
| Cannabis Wire | MediaFeed.org | The Hechinger Report |
| CNBC | Meredith Corporation | The Information |
| CNN (WarnerMedia) | Miami Herald / el Nuevo Herald | The Journal News, The (Middletown) Times Herald-Record, The Poughkeepsie Journal |
| Coda Story | NBC (NBCUniversal) | The Marshall Project |
| CoinDesk | NBC News | The Narwhal |
| Connecticut Mirror | NBC News / MSNBC (NBCUniversal) | The Nation |
| Connecticut Public Broadcasting | NBC News Studios | The New York Times |
| CQ Now (CQ Roll Call) | NBC News/London | Richard Engle Unit | The Points Guy |
| CQ Roll Call | NBC Owned Stations (NBCUniversal) | The Real Deal |
| Creative Media | NBC Stations - Digital / LX (NBCUniversal) | The Trace |
| Cultural Counsel | New York Daily News | The Wall Street Journal |
| DCist | News 12 (Altice USA) | Trusted Media Brands |
| Deseret News | NewsGuard | USA TODAY Network (Gannett) |
| Diverse: Issues in Higher Education | Nikkei America (Nikkei Asian Review) | ViacomCBS |
| Documented | Nikkei Asia | ViacomCBS-CBS News |
| Dotdash | NPR | ViacomCBS-Smithsonian Channel |
| E&E News | Outside magazine | WABC-TV (New York City) |
| Economic Hardship Reporting Project | OZY Media | WAMU (NPR station, Washington, D.C.) |
| Eurasianet | Patch | WBOC-TV (Salisbury, Md.) |
| Everyday Health | PBS NewsHour | WBUR (Boston) |
| Feature Story News | Penske Media Corporation | WFUV (radio, Fordham U. NPR affiliate) / PRNDI |
| Financial Times / Money-Media | Platonic Systems | Willamette Week |
| FIRING LINE with Margaret Hoover | POLITICO | WLRN Public Media |
| Fiscal Note (CQ Roll Call) | Quincy Media | WNEM-TV (Bay City, Mich., Flint, Mich., Saginaw, Mich.) |
| Food Bank News | Real Sports - HBO (WarnerMedia) | WNET-TV (PBS station, New York / New Jersey) |
| Forbes | Religion News Service | WNYC Studios |
| Foreign Affairs (Council on Foreign Relations) | Report For America | WOWK-TV (Nexstar, Charleston, W.V.) |
| Freakonomics | Rest of World | Yahoo Finance |
| FRONTLINE | Reuters | Zenger News |
| G/O Media | Royal Media | |
| GANNETT | USA TODAY NETWORK | Science Magazine | |
| Gastro Obscura | Seven Days |