Insider Trading & Ownership of David Nierenberg

Location
Camas, WA
Summary
The estimated net worth of David Nierenberg is at least $33,492,144 dollars as of 31 Mar 2025. David Nierenberg is the 10%+ Owner of POTBELLY CORP and owns shares of POTBELLY CORP stock worth about $29.1M. David Nierenberg is the Director of FLOTEK INDUSTRIES INC/CN/ and owns shares of FLOTEK INDUSTRIES INC/CN/ (FTK) stock worth about $4.39M.
Signature
NIERENBERG INVESTMENT MANAGEMENT COMPANY, INC. By: /s/ David Nierenberg Name: David Nierenberg Title:President
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Key facts

  • David Nierenberg has 3 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $33,492,144.
  • Recent insider filing activity is available below.

Change

  • Largest disclosed position: POTBELLY CORP ($29,104,649).
  • Past-year value change for that position: .

Research use

  • This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
  • You can cross-check role, issuer, and filing chronology directly against the SEC source.

Evidence

Filed on Form 4

Insider ownership context is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Ownership of David Nierenberg

PBPB Forms 3/4/5

POTBELLY CORP

Relationship
10%+ Owner
Holdings value
$29,104,649
Past year net change
Change %
Report period
28 Mar 2025

Insider Transactions Reported by David Nierenberg:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.
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