Petite Keep

Shark Tank founder · Season 16

Lindsay Mullenger

Founder & CEO of Petite Keep

On the show
S16 · Ep 9
Result
Deal · $400K
Company today
Still in business

Who is Lindsay Mullenger?

Lindsay Mullenger is a St. Louis entrepreneur who founded Petite Keep, a maker of personalized heirloom trunks for storing keepsakes. She graduated from the University of Missouri's Trulaske College of Business in 2010 and worked in a corporate role at Procter & Gamble. The idea came while she was organizing her oldest daughter's nursery and could not find an attractive way to store baby keepsakes. She built the first trunks as a side project, with family members helping assemble them, and stayed in her corporate job until the business reached six figures in revenue in its first year.

The trunks are hand-assembled in Missouri, with custom embroidery and designs by women artists, and are sold for births, weddings, graduations and other milestones. Sales grew from about $110,000 in 2020 to roughly $5 million in 2023. On Shark Tank in Season 16, Mullenger asked for $400,000 for 5% and set off a bidding war. She closed with Mark Cuban, Barbara Corcoran and guest shark Jamie Lima for $400,000 for 15%, split among the three.

Sources (3)
  1. kbia.org/missouri-news-network/2025-01-24/mizzou-graduate-to-pitch-her-design…
  2. meaww.com/how-to-buy-petite-keep-discount-code-what-happened-to-petite-keep-price…
  3. showme.missouri.edu/2025/mizzou-alumna-petite-keep-founder-to-appear-on-abcs-shar…

Written from published interviews, company announcements and news coverage. How we research · Suggest a correction

The Shark Tank deal

Lindsay Mullenger pitched Petite Keep in Shark Tank Season 16, Episode 9 (aired Jan 24, 2025). They asked for $400,000 in exchange for 5% equity, valuing the business at $8M. The entrepreneurs walked away with a deal from Barbara Corcoran, Mark Cuban and Jamie Lima: $400,000 for 15%. That put the final valuation at $2.67M, 67% below what they originally asked for.

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Frequently asked questions

What is Lindsay Mullenger doing now?

She runs Petite Keep, selling personalized keepsake trunks direct online.

What deal did Petite Keep get on Shark Tank?

Mark Cuban, Barbara Corcoran and Jamie Lima invested $400,000 for 15%, split three ways.

Where did Lindsay Mullenger go to college?

She graduated from the University of Missouri's Trulaske College of Business in 2010.

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