STEALTH BIOLOGICS LLC

Lyme, NH · Biotech · Acquired

Deimmunized uricase enzyme variants engineered using AI-driven protein design to treat hyperuricemia and gout

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Updated Oct 23, 2026 · stealthbiologics.com

Sector: Biotech
Headquarters: Lyme, NH
Total capital: $2.9M

Federal grants: $2.9M; 8 awards · 2015–2021; Rank in peer group#99 of 326
Private capital raised: None on recordNo Form D filings on SEC EDGAR. Some raises are not filed.
Federal contracts: $5K; 1 award · Veterans Affairs; Rank in Biotech#388 of 4373
Granted patents: 3; 1 pending · first 2019; Rank in peer group#45 of 326

Capital timeline

Latest events

Mar 2021Federal grantHealth and Human S · Phase II · Engineering a potent immune-evading uricase$1M
Dec 2019Federal grantHealth and Human S · Phase II · Deimmunized Griffithsin Microbicide$299K
Dec 2019Federal grantHealth and Human S · Phase I · Deimmunized Griffithsin Microbicide$299K
Dec 2019Federal grantHealth and Human S · Phase I · Engineering a Potent Immune-evading Uricase$300K
Dec 2019Federal grantHealth and Human S · Phase I · Engineering a Potent Immune-evading Uricase$300K
Sep 2019Federal contractVeterans Affairs · Research Contract Protein Sequencing Dr Lavie$5K
Apr 2019Federal grantHealth and Human S · Phase I · Improving HSV-2 vaccine efficacy by focusing antibody epitope coverage.$285K

Show 2 earlier federal awards

Feb 2015Federal grantHealth and Human S · Phase I · Design and Development of Immunotolerant S. aureus Biotherapies$186K
Feb 2015Federal grantHealth and Human S · Phase I · Design and Development of Immunotolerant S. aureus Biotherapies$186K

Node area is scaled to amount. Form D reports securities sold, which can differ from an announced round; filings are numbered in the order they were made.

Standing among 326 peers

Line = median

Biotech · Molecule

Federal grants#99 · top 30%
Granted patents#45 · top 14%

Cumulative measures favor older companies. Rankings describe position today, not outcome. Below the median, ranks show as a band rather than a number.

Founders and team

No founders are linked to this company yet.

Founders appear once a person is matched to the company through its own patents, grants or filings. We never infer people from social profiles.

Checked: USPTO inventors; federal award principal investigators; SEC Form D related persons · Oct 23, 2026

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What it has protected

USPTO · 3 granted of 4

Oct 1, 2024GrantedDeimmunized Lysostaphin And Methods Of UseUSPTOUS 12,104,186
Aug 17, 2021GrantedDeimmunized Lysostaphin And Methods Of UseUSPTOUS 11,091,749
Jul 23, 2019GrantedDeimmunized Lysostaphin And Methods Of UseUSPTOUS 10,358,636

Show all 4 patent records

Deimmunized Lysostaphin And Methods Of UseOct 1, 2024 · US 12,104,186Granted
Deimmunized Lysostaphin And Methods Of UseAug 17, 2021 · US 11,091,749Granted
Deimmunized Lysostaphin And Methods Of UseJul 23, 2019 · US 10,358,636Granted
Deimmunized Lysostaphin And Methods Of UseApplication PCTUS2015030765Pending

Cellecta, IncorporatedSimilar federal contract value in Biotech · $9K in contracts
Zenobia Therapeutics, Inc.Similar federal contract value in Biotech · $8K in contracts
RADIOMEDIX, INC.Similar federal contract value in Biotech · $5K in contracts
Claret Bioscience LLCSimilar federal contract value in Biotech · $5K in contracts
Minerva NeurosciencesSimilar federal contract value in Biotech · $5K in contracts
Foresite LabsSimilar federal contract value in Biotech · $3K in contracts

Regulatory activity · Biotech

Sector-level, not company-level

07 Jul 2026New Animal Drugs; Approval of New Animal Drug Applications; Withdrawal of Approval of New Animal Drug Application; Change of SponsorFood and Drug Administration
30 Jun 2026Medical Devices; General and Plastic Surgery Devices; Classification of the Skin Patch for Treatment of HyperhidrosisFood and Drug Administration
30 Jun 2026Medical Devices; Anesthesiology Devices; Classification of the Monitor for Opioid Induced Impairment of OxygenationFood and Drug Administration
29 Jun 2026Medical Devices; Orthopedic Devices; Classification of the Medial Knee Implanted Shock AbsorberFood and Drug Administration
26 Jun 2026Medical Devices; Neurological Devices; Classification of the External Lower Extremity Nerve Stimulator for Restless Legs SyndromeFood and Drug Administration
26 Jun 2026Medical Devices; General Hospital and Personal Use Devices; Classification of the Infant Supine Sleep SystemFood and Drug Administration

Rules are matched to sector, not to company. Recent activity in a sector is context rather than a signal about this business — until rules are matched to what a company actually builds, the section is shown as context and nothing more.

Sources

Federal grants from SBIR/STTR, NIH, NSF and DoD records. Federal contracts from USAspending.gov. Private capital from SEC Form D. Patents from USPTO. Publications from OpenAlex. Regulatory activity from the Federal Register. Press matched on company name.

How to read this page

Figures show associations in public records, not causes or predictions. Nothing here is investment advice. An em-dash means no record was found under this company's name, not that none exists.

Data freshness

SEC Form D filings through Oct 23, 2026. SBIR and STTR awards through Oct 21, 2026.