Insider Trading & Ownership of John D. Halpern

Summary
The estimated net worth of John D. Halpern is at least $1,195,979 dollars as of 08 Jan 2024. John D. Halpern is the 10%+ Owner of Eterna Therapeutics Inc. and owns shares of Ernexa Therapeutics Inc. (ERNA) stock worth about $1.12M. John D. Halpern is the Member of 10% owner group of Comera Life Sciences Holdings, Inc. and owns shares of Comera Life Sciences Holdings, Inc. stock worth about $77.1K.
Signature
/s/ John D. Halpern
All Insider Reports
All Insider Reports

Follow Filing Activity

Follow John D. Halpern and return when a new Insider Trading filing changes the record on this page.

This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.

Sign up to save research and follow filings

Quick Takeaways

  • John D. Halpern has 2 issuer positions tracked on this page.
  • Estimated disclosed ownership value: $1,195,979.
  • Recent insider filing activity is available below.

What Changed

  • Largest disclosed position: Eterna Therapeutics Inc. ($1,118,891).
  • Past-year value change for that position: .

Why This Matters

  • 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.

Source Evidence

Filed on Form 4

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

See Original Filing

Ownership of John D. Halpern

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
ERNA, ERNAW Eterna Therapeutics Inc. 10%+ Owner $1,118,891 02 Dec 2022
CMRA Comera Life Sciences Holdings, Inc. Member of 10% owner group $77,088 27 Dec 2023

Insider Transactions Reported by John D. Halpern:

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.