CACrown ArchivesThe cinema collection
Menu
Research dossier · General Reference

Ellen Siminoff

American entrepreneur

Cross-disciplinary reference desk with index cards, atlas, dictionary and catalogue
General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 23, 2026
Entity authorityQ5365012 ↗
Source-derived summary

Ellen Siminoff (born 1967, Milwaukee, Wisconsin) is an entrepreneur, board member and investor. Frequently quoted in The New York Times as an Internet industry commentator, Siminoff was named one of Forbes magazine's Masters of Information in 2005.

Along with her husband, David Siminoff, Ellen is co-founder and former chief executive officer of Shmoop.

Life and education

Siminoff obtained a BA in economics from Princeton University and an MBA from Stanford University, where she met her husband David Siminoff while they were students at the Stanford Graduate School of Business.

She also has a Master of Liberal Arts in Extension Studies Software Engineering from Harvard University.

Career

Siminoff is a seasoned executive in the media and technology sectors, From 2007 to 2018, she served as president and CEO of Shmoop University, an educational publishing company. Prior to this role, she was president and CEO of Efficient Frontier, a company specializing in dynamic Search Engine Marketing (SEM) management services, which was later acquired by Adobe.

Yahoo!

Siminoff was a founding executive at Yahoo!, working at the company from 1996 to 2002. She started by running corporate and business development, running mergers and acquisitions after the departure of J. J. Healy.

Editorial summary

The public source identifies “Ellen Siminoff” as american entrepreneur. This brief keeps that definition visible, then builds a research path around Ellen, Siminoff and American.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—1967, 2005, 2007, 2018—that can be checked directly. The linked authority record independently contributes the date 1967-01-01. Its value is orientation rather than verdict, with Ellen, Siminoff and American providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Ellen Siminoff”, the useful work is to connect “american entrepreneur” to the records capable of establishing context and consequence.

Evidence profile

Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Sep 23, 2026. The linked authority identifier is Q5365012. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1967, 2005, 2007 and 2018.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “Ellen Siminoff”, its source revision and the description used here.
  2. Expand the search: follow Ellen Siminoff primary sources, Ellen Siminoff archive and Ellen research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “Ellen Siminoff”?
  2. Which institution is responsible for the underlying evidence?
  3. What terminology or title could unlock a more precise catalogue search?
Subject index

Search terms from this dossier

Source & attribution

This entry incorporates text from “Ellen Siminoff” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.