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Spectrum Effect, Inc.

Software that helps mobile operators identify and reduce wireless network interference.

Updated Nov 9, 2026·Latest SEC filing Aug 21, 2026·Suggest an edit

About Spectrum Effect

Spectrum Effect is a private company based in Bellevue, Washington. It has reported $18,974,363 raised in seven offerings on Form D since December 2015. Its chief executive is Charles Immendorf.

Funding Rounds (SEC Form D)

First saleFiled with SECAmount soldInvestorsAvg. checkTermsFiling
Jul 15, 2026Aug 21, 2026$1,858,651of $2.0M target27$68,839EquityRule 506(b)Form D ↗
Jan 22, 2025Feb 6, 2025$2,070,379of $4.4M target21$98,589EquityRule 506(b)Form D ↗
Dec 1, 2023Dec 15, 2023$1,750,000fully sold2$875KEquityRule 506(b)Form D ↗
Jul 28, 2023Aug 9, 2023$1,917,000of $2.0M target22$87,136EquityRule 506(b)Form D ↗
Oct 31, 2022Nov 14, 2022$2,500,000fully sold2$1.2MDebt, Convertible Senior Promissory NoteRule 506(b)Form D ↗
Dec 11, 2020Dec 22, 2020$8,000,000fully sold1$8.0MEquityRule 506(b)Form D ↗
Jul 2, 2015Dec 18, 2015amended Apr 1, 2016$878,333of $1.5M target9$97,593EquityRule 506(b)Form D/A ↗1 earlier filing
Total, seven offerings$18,974,363

First sale is the date the first investor in the offering committed to invest. Companies must file Form D within 15 days of that date, so filing dates run later.

Leadership Team

Executive officers and directors listed on Spectrum Effect's Form D filed Aug 21, 2026.

JL
Joseph Landy
Director
GS
Gary Sledge
Director
Debby Toye
Debby Toye
Chief Financial Officer
WT
William Targett
Secretary/VP/General Counsel
Also a secretary/general counsel at Opanga Networks.
MD
Mary Dougherty
Treasurer
Also an executive officer at Opanga Networks.

Earlier filings also listed Kishen Mangat (director, last listed Feb 2025), John Saw (director, last listed Feb 2025) and Charles Judson (executive officer, last listed Apr 2016).

Sources

  1. SECSpectrum Effect, Inc. Form D, filed Dec 18, 2015
  2. SECSpectrum Effect, Inc. filing history
  3. CompanySpectrum Effect about
  4. CompanySpectrum Effect contact