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| 231 Sheep LLC | W Valley Blvd # B | San Gabriel | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| A2 Biotherapeutics Inc | Agoura Rd # 210 | Agoura Hills | R and D in PS, ES, and LSci (ex Ntech, Btech) | Unknown employees |
| A2 Systems Engineering Inc | Rosecrans Ave # 4330 | El Segundo | R and D in PS, ES, and LSci (ex Ntech, Btech) | 10-19 employees |
| Aba Network Inc | Via Colinas # 108 | Westlake Village | R and D in PS, ES, and LSci (ex Ntech, Btech) | 1-4 employees |
| Abbvie | Clearidge Dr | Valencia | R and D in PS, ES, and LSci (ex Ntech, Btech) | 20-49 employees |
| Abbvie | Russell Ranch Rd # 300 | Westlake Village | R and D in PS, ES, and LSci (ex Ntech, Btech) | 100-249 employees |
| Abcentra LLC | Century Park E # 1700 | Los Angeles | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Aceso Ai | | Los Angeles | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Acosolar Inc | Valley Blvd | Walnut | R and D in PS, ES, and LSci (ex Ntech, Btech) | 10-19 employees |
| Acta Sbir Holdings LLC | Skypark Dr # 310 | Torrance | R and D in PS, ES, and LSci (ex Ntech, Btech) | 10-19 employees |
| Adaptive Computation LLC | S Poppy Ln | Glendora | R and D in PS, ES, and LSci (ex Ntech, Btech) | 10-19 employees |
| Advanced Ergonomic Solutions | Avenue Stanford # 126 | Valencia | R and D in PS, ES, and LSci (ex Ntech, Btech) | 1-4 employees |
| Albireo Technologies LLC | Kilfinan St | Porter Ranch | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Alfred E Mann Foundation | Rye Canyon Loop # 200 | Valencia | R and D in PS, ES, and LSci (ex Ntech, Btech) | 100-249 employees |
| All4Life | | Malibu | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Alumniex | | Los Angeles | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| America Chung Nam Inc | Fairway Dr # 3 | Walnut | R and D in PS, ES, and LSci (ex Ntech, Btech) | 100-249 employees |
| Anacapa Technology Inc | E Arrow Hwy | San Dimas | R and D in PS, ES, and LSci (ex Ntech, Btech) | 1-4 employees |
| Aphid | | Los Angeles | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Apium | E Wilson Ave | Glendale | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Applied Minds Inc | N Ontario St | Burbank | R and D in PS, ES, and LSci (ex Ntech, Btech) | 100-249 employees |
| Arcflash Labs LLC | Belford Ave # 603 | Los Angeles | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Ark Clinical Research | Redondo Ave # 400 | Long Beach | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| ARM | Devonshire St # 106 | Chatsworth | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |
| Arquimea USA Inc | W 226th St | Torrance | R and D in PS, ES, and LSci (ex Ntech, Btech) | 5-9 employees |