Singletto
Seattle, US · Founded 2020 · Washington corporation · 1 known investors
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Singletto develops Oxafence Active Protection™, a materials-applied antimicrobial technology integrated into protective materials such as masks, using photodynamic approaches to enable active microbial inactivation during use. The company licenses its platform technology to healthcare, operational, and emerging markets where traditional antimicrobial solutions have proven limited.
Founders & leadership


Investors · 1
Reported raises · per SEC filings
Form D private placements$11M disclosed across 6 rounds · 2020–2026
▶$100KraisedMar 2026 · 1 investors · Other Health CareRule 506(b)
- Michael ButlerDirector
- Thomas Sean LendvayExecutive Officer, Director
- John David BjornsonExecutive Officer, Director
- James David ChenExecutive Officer, Director
- Offering amount
- $10M
- Amount sold
- $100K
- First sale
- Mar 2026
- Incorporated
- Corporation, Washington
- Federal exemptions
- 06b
▶$10.5MraisedApr 2025 · 80 investors · Other Health CareRule 506(b)
- Thomas Sean LendvayExecutive Officer, Director
- James David ChenExecutive Officer, Director
- John David BjornsonExecutive Officer, Director
- Offering amount
- $13.4M
- Amount sold
- $10.5M
- First sale
- Apr 2025
- Incorporated
- Corporation, Washington, 2020
- Federal exemptions
- 06b
▶$65KraisedJan 2024 · 1 investors · Other Health CareRule 506(b)
- James David ChenExecutive Officer, Director
- Thomas Sean LendvayExecutive Officer, Director
- John David BjornsonExecutive Officer, Director
- Offering amount
- $10M
- Amount sold
- $65K
- First sale
- Jan 2024
- Incorporated
- Corporation, Washington, 2020
- Federal exemptions
- 06b
▶$200KraisedMay 2023 · 2 investors · Other Health CareRule 506(b)
- John David BjornsonExecutive Officer, Director
- James David ChenExecutive Officer, Director
- Thomas Sean LendvayExecutive Officer, Director
- Offering amount
- $5M
- Amount sold
- $200K
- First sale
- May 2023
- Incorporated
- Corporation, Washington, 2020
- Federal exemptions
- 06b
▶$50KraisedAug 2021 · 1 investors · Other Health CareRule 506(b)
- John David BjornsonExecutive Officer, Director
- James David ChenExecutive Officer, Director
- Thomas Sean LendvayExecutive Officer, Director
- Offering amount
- $5M
- Amount sold
- $50K
- First sale
- Aug 2021
- Incorporated
- Corporation, Washington, 2020
- Federal exemptions
- 06b
▶$75KraisedOct 2020 · 3 investors · Other Health CareRule 506(b)
- Thomas Sean LendvayExecutive Officer, Director
- James David ChenExecutive Officer, Director
- John David BjornsonExecutive Officer, Director
- Offering amount
- $1.5M
- Amount sold
- $75K
- First sale
- Sep 2020
- Incorporated
- Corporation, Washington, 2020
- Federal exemptions
- 06b
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
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Frequently asked questions
- What does Singletto do?
- Singletto develops Oxafence Active Protection™, a materials-applied antimicrobial technology integrated into protective materials such as masks, using photodynamic approaches to enable active microbial inactivation during use. The company licenses its platform technology to healthcare, operational, and emerging markets where traditional antimicrobial solutions have proven limited.
- Who are Singletto's investors?
- Singletto's investors include SeaChange.
- How much funding has Singletto raised?
- Singletto has disclosed $11M raised across 6 rounds.
- Where is Singletto headquartered?
- Singletto is headquartered in Seattle, US.
