Ellen F. Siminoff is a long-tenured media and technology executive and board member. From 2007 to 2018, she was President and CEO of Shmoop University, an educational publishing company which has built millions of units of content, currently consumed by over 15 million users, and licenses its products to high schools, libraries, and school districts.
Ms. Siminoff also previously served as President and CEO of Efficient Frontier, a pioneer in the field of dynamic Search Engine Marketing (SEM) management services, having joined near the company’s founding and building it to manage over $1 billion in marketing spend. Efficient Frontier was sold to Adobe for $425 million. Prior to Efficient Frontier, Ms. Siminoff had six years as a founding executive at Yahoo!. During her tenure, she led Business Development (VP, Business Development and Planning) and Corporate Development (SVP, Corporate Development) and ran the Small Business and Entertainment Business units. Earlier in her career, she ran the online classifieds service for The Los Angeles Times and founded EastNet, a distributor of bartered television programming into Eastern Europe and Russia.
Among other boards and advisory relationships, Ms. Siminoff currently serves on the board of Discovery Education, a global leader in standards-aligned digital curriculum resources and professional learning for K-12 classrooms, on the board of BigCommerce (NASDAQ: BIGC), a leading SaaS ecommerce platform, and on the board of Verifone, Inc., a digital commerce and payments technology company. In 2005 she was one of eight industry professionals named "Masters of Information" by Forbes magazine. She is also currently a member of the Advisory Board of Stanford University’s Graduate School of Business. Other prior board experiences include SolarWinds Corporation (NYSE: SWI), CarParts.com, Inc. (NASDAQ: PRTS), Journal Communications, and Mozilla Corporation (the developers of Firefox browsers).
Ms. Siminoff graduated Stanford's Graduate School of Business with an M.B.A. and Princeton University with an A.B. in Economics. She is currently enrolled in the Harvard University online software engineering program, where she plans to continue studying. She is a struggling golfer, an expert skier, a wife, and a mom of two who feels daily how quickly our lives go by.
What is Ellen F. Siminoff's net worth?
The estimated net worth of Ellen F. Siminoff is at least $12.77 thousand as of November 14th, 2025. Ms. Siminoff owns 2,716 shares of Commerce.com stock worth more than $12,765 as of December 4th. This net worth evaluation does not reflect any other investments that Ms. Siminoff may own. Learn More about Ellen F. Siminoff's net worth.
How do I contact Ellen F. Siminoff?
Has Ellen F. Siminoff been buying or selling shares of Commerce.com?
Ellen F. Siminoff has not been actively trading shares of Commerce.com over the course of the past ninety days. Most recently, on Thursday, March 6th, Ellen F. Siminoff bought 177,158 shares of Commerce.com stock. The stock was acquired at an average cost of $6.64 per share, with a total value of $1,176,329.12. Following the completion of the transaction, the director now directly owns 253,333 shares of the company's stock, valued at $1,682,131.12. Learn More on Ellen F. Siminoff's trading history.
Who are Commerce.com's active insiders?
Commerce.com's insider roster includes Robert Alvarez (CFO), Thomas Aylor (VP), Brian Dhatt (CTO), Jimmy Duvall (Insider), Lisa Eggerton (CMO), Russell Klein (Insider), Jeff Mengoli (Insider), Steven Murray (Director), Marc Ostryniec (Insider), Michael O'Sullivan (General Counsel), Jeffrey Richards (Director), Ellen Siminoff (Director), and Paul Vaillancourt (Insider). Learn More on Commerce.com's active insiders.
Are insiders buying or selling shares of Commerce.com?
During the last year, Commerce.com insiders bought shares 2 times. They purchased a total of 180,397 shares worth more than $1,196,670.04. During the last year, insiders at the sold shares 1 times. They sold a total of 98,080 shares worth more than $450,187.20. The most recent insider tranaction occured on September, 12th when insider Russell Scott Klein sold 98,080 shares worth more than $450,187.20. Insiders at Commerce.com own 9.1% of the company.
Learn More about insider trades at Commerce.com. Information on this page was last updated on 9/12/2025.
