AAV / Gene Therapy CDMOs with Clean FDA Inspection History
30
CDMOs tracked
30
Fully scored
14
With FDA records
32
FDA inspections
152
EMA/MHRA GMP certs
Adeno-associated virus (AAV) is the dominant delivery platform for in vivo gene therapy, from rare-disease programs to larger systemic indications. Rising demand has pushed CDMOs to scale suspension processes and tighten full/empty capsid analytics.
Selecting an AAV CDMO hinges on serotype experience, suspension vs adherent platform, full/empty capsid separation, and a proven regulatory record. The rankings below score each manufacturer on FDA inspections, GMP certification, clinical activity, and capacity.
FDA inspection outcomes across these CDMOs: 13 NAI (no action), 19 VAI (voluntary action), 0 OAI (official action). Leading inspection & GMP sites: UNITED KINGDOM (42), United States (30), Denmark (30), Germany (13), Ireland (11).
Last updated 2026-06-29. Sourced from FDA, EMA EudraGMDP, MHRA GMDP, and ClinicalTrials.gov.
| # | CDMO | Signal Score | Quality | FDA · GMP | Capacity | Programs |
|---|---|---|---|---|---|---|
| 1 |
CR
Charles River Laboratories
Newbury Park, CA · Memphis, TN · Keele, UK · Rockville, MD
|
91.7 | 98.7 | 7 insp · 11 GMP | Limited | 0 programs |
| 2 |
RP
ReciBioPharm
Keele, UK · Sodertalje, SE
|
88.0 | 100.0 | 0 insp · 3 GMP | — | 0 programs |
| 3 |
PB
Pharmaron Biologics
San Diego, CA · Shaoxing, CN
|
85.6 | 100.0 | 3 insp · 0 GMP | — | 0 programs |
| 4 |
AJ
Ajinomoto Bio-Pharma Services
San Diego, CA · Osaka, JP
|
85.6 | 100.0 | 0 insp · 1 GMP | — | 0 programs |
| 5 |
LB
Lotte Biologics
Incheon, KR · Syracuse, NY
|
83.7 | 100.0 | 1 insp · 0 GMP | — | 0 programs |
| 6 |
WB2
WuXi Biologics
Shanghai, CN · Wuxi, CN
|
83.7 | 100.0 | 0 insp · 4 GMP | — | 0 programs |
| 7 |
KB
KBI Biopharma
Durham, NC · Boulder, CO
|
83.5 | 100.0 | 1 insp · 1 GMP | Limited | 0 programs |
| 8 |
FD
FUJIFILM Diosynth Biotechnologies
Research Triangle, NC · Holly Springs, NC · Hillerod, DK
|
83.5 | 100.0 | 0 insp · 18 GMP | 0 programs | |
| 9 |
TF
Thermo Fisher Scientific
Plainville, MA · Alachua, FL · Cambridge, MA
|
83.1 | 97.9 | 5 insp · 10 GMP | Available | 2 programs |
| 10 |
BR
BioReliance (Merck)
Glasgow, UK · Rockville, MD
|
81.0 | 98.8 | 2 insp · 8 GMP | — | 0 programs |
| 11 |
NW
Northway Biotech
Vilnius, LT; Waltham (MA), USA
|
80.8 | 100.0 | 0 insp · 8 GMP | Available | 0 programs |
| 12 |
AG
AGC Biologics
Longmont, CO · Milan, IT · Copenhagen, DK · Chiba, JP
|
80.6 | 99.9 | 1 insp · 23 GMP | Available | 2 programs |
| 13 |
TK
Takeda
Boston, MA · Zurich, CH
|
80.5 | 99.3 | 3 insp · 18 GMP | — | 100 programs |
| 14 |
OB
OmniaBio
Hamilton, ON
|
79.5 | 100.0 | 0 insp · 2 GMP | — | 0 programs |
| 15 |
PG
ProBioGen
Berlin, DE
|
78.9 | 100.0 | 0 insp · 2 GMP | — | 0 programs |
| 16 |
XP
eXmoor Pharma
Bristol, UK
|
78.7 | 100.0 | 0 insp · 1 GMP | — | 0 programs |
| 17 |
Lonza
Basel, Switzerland
|
78.2 | 95.1 | 2 insp · 8 GMP | — | 1 programs |
| 18 |
AA
Ascend Advanced Therapies
Philadelphia, PA
|
78.1 | 100.0 | 0 insp · 1 GMP | — | 0 programs |
| 19 |
NG
NecstGen
Leiden, NL
|
78.1 | 100.0 | 0 insp · 1 GMP | — | 0 programs |
| 20 |
ET
Exothera
Jumet, BE
|
78.1 | 100.0 | 0 insp · 4 GMP | — | 0 programs |
| 21 |
CE
Celonic
Basel, Switzerland
|
78.1 | 100.0 | 0 insp · 1 GMP | — | 0 programs |
| 22 |
AD
Advent Bioservices
London, UK
|
78.1 | 100.0 | 0 insp · 2 GMP | — | 0 programs |
| 23 |
BV
Biovian
Turku, Finland
|
78.0 | 99.7 | 1 insp · 4 GMP | — | 0 programs |
| 24 |
AG2
August Bioservices
San Carlos, CA
|
77.4 | 98.5 | 1 insp · 0 GMP | — | 0 programs |
| 25 |
OX
Oxford Biomedica
Oxford, United Kingdom
|
77.1 | 100.0 | 0 insp · 13 GMP | Available | 7 programs |
| 26 |
VG
Viralgen Vector Core
San Sebastián, Spain
|
76.8 | 100.0 | 0 insp · 4 GMP | Available | 0 programs |
| 27 |
CI
Cincinnati Children's Vector Production Facility
Cincinnati, OH
|
75.2 | 100.0 | 1 insp · 0 GMP | — | 1 programs |
| 28 |
LZ
Lonza Biologics
Houston, TX · Portsmouth, NH · Geleen, NL · Basel, CH
|
72.8 | 95.1 | 1 insp · 0 GMP | Limited | 0 programs |
| 29 |
RT
ReiThera
Rome, IT
|
71.1 | 100.0 | 0 insp · 4 GMP | — | 1 programs |
| 30 |
GZ
Genezen
Indianapolis, IN · Lexington, MA
|
70.7 | 84.1 | 3 insp · 0 GMP | Available | 0 programs |
What to evaluate in a AAV / Gene Therapy CDMO
Platform & scale
Suspension processes scale better than adherent (HEK293) for commercial volumes. Confirm the CDMO's largest validated bioreactor scale and serotype track record.
Capsid quality
Full/empty capsid ratio and aggregate control drive potency and safety. Ask about AUC, anion-exchange separation, and the analytics package for capsid characterization.
Regulatory readiness
For programs heading to BLA, a strong FDA inspection history and EMA/MHRA GMP coverage matter — both are shown above and on each profile.
Capacity & timelines
AAV manufacturing slots can be constrained. Weigh the capacity signal and clinical-program load before committing.
AAV / Gene Therapy CDMOs — Frequently Asked Questions
Who are the top AAV / Gene Therapy CDMOs?
By CDMO Signal's independent Signal Score, the top-ranked AAV / Gene Therapy CDMOs include Charles River Laboratories, ReciBioPharm, Pharmaron Biologics. See the full ranked table above — scored on FDA, clinical, financial, and capacity data.
How many AAV / Gene Therapy CDMOs have FDA inspection records?
CDMO Signal tracks 14 AAV / Gene Therapy CDMOs with FDA inspection records and 152 EMA/MHRA GMP certificates across the group.
What should I look for in an AAV CDMO?
Look for serotype experience, a scalable suspension platform, strong full/empty capsid analytics, and a clean FDA and EMA/MHRA record. Match validated bioreactor scale to your dose and indication.
What's the difference between AAV and lentiviral CDMOs?
AAV is non-integrating and produced at higher volumes for in vivo gene therapy. Lentivirus integrates into the genome, is made under BSL-2 with RCL testing, and is used mainly for ex vivo cell engineering like CAR-T.
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