Summary
Updated Aug 31, 2026
Joe Mastrangelo is Chief Executive Officer, Director of Eos Energy Enterprises, Inc. (EOSE). 10 SEC Form 4 filings on record going back to 2025, most recently on 26 August 2026. Most recent open-market trade: sold $575K of EOSE on 28 July 2026. Lifetime open-market purchases: $502K. Lifetime open-market sales: $2.19M.
Recent Transactions
15Every recent SEC Form 4 transaction Joe Mastrangelo has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Joe Mastrangelo go back to 2025: 10 primary Form 4 filings, an average of 5.0 per year. The typical open-market purchase is $251K (2 buys totaling $502K). The largest single buy on record is $345K of EOSE in 2026. Sales side: 3 recorded sales totaling $2.19M, so the filing history runs sell-heavy by dollar value. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Joe Mastrangelo files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Nathan Kroeker - $1.75M of EOSE open-market activity in the last 12 months
- Marian Walters - $885K of EOSE open-market activity in the last 12 months
- Michael W. Silberman - $827K of EOSE open-market activity in the last 12 months
- Sumeet Puri - $438K of EOSE open-market activity in the last 12 months
- David Urban - $100K of EOSE open-market activity in the last 12 months
- Alexander Dimitrief - $91K of EOSE open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Joe Mastrangelo?
Joe Mastrangelo is a corporate insider, tracked as Chief Executive Officer, Director of Eos Energy Enterprises, Inc. (EOSE). InsiderAlpha holds 10 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Joe Mastrangelo submitted recently?
6 primary Form 4 filings in the last 90 days, covering 1 company.
Has Joe Mastrangelo been buying or selling stock?
Recorded transactions: 2 open-market purchases ($502K) and 3 open-market sales ($2.19M) across all tracked filings.
Where can I see all of Joe Mastrangelo's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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