Thayermahan, Inc.
Other Technology · Groton, Connecticut
Thayermahan, Inc. is a other technology company based in Groton, Connecticut, incorporated in 2016. It has reported $67.5 million raised across 5 Form D filings with the SEC, most recently in 2023.
ThayerMahan provides innovative maritime surveillance systems and expertise, connected by a global data platform, to help to protect our nation and its vital interests.
| Date | Round | Amount | Raised to date | Lead investor | Source |
|---|---|---|---|---|---|
| 2023-12-11 | — | $14.5M | $67.5M | SEC Form D | |
| 2023-02-14 | —+1 amd | $50.2M | $53.0M | SEC Form D | |
| 2016-02-16 | —+1 amd | $2.7M | $2.7M | 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.