Summary
Updated Aug 30, 2026
Mark Arnold Hagler is Chief Commercial Officer of NovaBridge Biosciences (NBP). 2 SEC Form 4 filings on record, most recently on 10 July 2026. Most recent open-market trade: bought $577K of NBP on 28 April 2026. Lifetime open-market purchases: $577K.
Recent Transactions
1Every recent SEC Form 4 transaction Mark Arnold Hagler has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Arnold Hagler 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.
- Sean Wuxiong Cao - $43K of NBP open-market activity in the last 12 months
- Cong Claire Xu - $18K of NBP open-market activity in the last 12 months
- Phillip Andrew Dennis - $6K of NBP 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 Mark Arnold Hagler?
Mark Arnold Hagler is a corporate insider, tracked as Chief Commercial Officer of NovaBridge Biosciences (NBP). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark Arnold Hagler submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark Arnold Hagler been buying or selling stock?
Recorded transactions: 1 open-market purchase ($577K) and 0 open-market sales across all tracked filings.
Where can I see all of Mark Arnold Hagler'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.
Learn More
Follow Mark Arnold Hagler and every insider like them
A free account opens the full scored daily plan and every past day, a watchlist for any ticker, and 3 months of price history on every company page. No card.
Free plan available · Paid plans start with a 7-day free trial
