Serionix, Inc.
Other Technology · Urbana, Illinois
Serionix, Inc. is a other technology company based in Urbana, Illinois, incorporated in 2011. It has raised at least $12.1 million across 7 known rounds, of which $11.8 million was reported to the SEC on 7 Form D filings, most recently in 2024.
Manufactures high-performance air filters based on a proprietary absorptive coating technology, removing toxic chemicals and odors from the air.
| Date | Round | Amount | Raised to date | Lead investor | Source |
|---|---|---|---|---|---|
| 2024-04-03 | — | $4.9M | $12.1M | SEC Form D | |
| 2022-12-22 | —+1 amd | $1.4M | $7.2M | SEC Form D | |
| 2021-12-16 | —+1 amd | $4.8M | $5.9M | SEC Form D | |
| 2016-08-02 | —+1 amd | $725K | $1.1M | SEC Form D | |
| 2013-02-27 | — | $325K | $335K | SEC Form D | |
| 2012-05-15 | — | $10K | $10K | SEC Form D |
SEC rows are Form D filings, where the amount is what was actually sold and amendments update a round rather than adding one. Press rows are split between company-issued releases or wires and editorial or third-party coverage. The total is therefore a floor: a round nobody reported is a round we cannot see. A buyout or control change appears in the timeline but is never added to the total: that money goes to shareholders, not into the company.
Form D is the notice a company files with the SEC when it sells securities without registering them. It reports the amount sold, not a valuation. Figures here are what the filing says. Where a filing is silent, the field is left blank rather than estimated. “Total raised” adds press-reported rounds that never appear in a filing, so it is a floor rather than an audited sum: press amounts are the figures the company announced, and a round nobody reported is a round we cannot see.