- Mark Singer is credited with founding the Gorilla Glue brand in 1994 after identifying and acquiring the North-American rights to a polyurethane adhesive originally used in furniture manufacturing.
- The Gorilla Glue brand has since grown into a major player in the adhesive / DIY market, with many product variants (adhesives, tapes, epoxies) and global reach.
- Measuring net worth: Because it’s a privately-held business (or at least not fully public), exact figures aren’t verifiable. Most published numbers are third-party estimates.
Also read: Top 10 Old Bollywood Heroines In 2025
💰 Estimated Net Worth in 2025
- Many sources estimate Mark Singer’s net worth around US$300 million as of 2025.
- Some sources give a slightly lower estimate around US$250 million for 2025.
- A few older estimates (for 2024) also use the ~$300 million figure.
So, a reasonable working estimate: ≈ US$300 million (give or take) in 2025.
🔍 Important Caveats
- Because Gorilla Glue is privately held (or was sold/some ownership transferred; different sources conflict) the exact stake Singer holds and the company valuation are not publicly audited.
- Net worth estimates often depend on assumed valuations of the company plus Singer’s assumed share, plus other assets. These assumptions vary greatly across publications.
- None of the sources reviewed provide independently audited figures for Singer’s total assets, liabilities, or liquidity.
- The adhesive/DIY market is susceptible to competition, raw-material costs, currency exchange, and brand risk — all of which could affect value.
