Summary
Updated Aug 31, 2026
BAIN CAPITAL INVESTORS LLC files SEC Form 4 reports at Kailera Therapeutics, Inc. (KLRA). 6 SEC Form 4 filings on record going back to 2024, most recently on 20 April 2026. Most recent open-market trade: bought $134.38M of KLRA on 20 April 2026. Lifetime open-market purchases: $134.38M. Lifetime open-market sales: $1.42B.
Recent Transactions
13Every recent SEC Form 4 transaction BAIN CAPITAL INVESTORS LLC has reported, most recent first.
Trading Pattern
InsiderAlpha's records for BAIN CAPITAL INVESTORS LLC go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $134.38M (1 buy totaling $134.38M). The largest single buy on record is $134.38M of KLRA in 2026. Sales side: 5 recorded sales totaling $1.42B, 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 BAIN CAPITAL INVESTORS LLC 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.
- Andrew T. Kaplan - $134.38M of KLRA open-market activity in the last 12 months
- Jennifer Lynn Davis - $46.50M of BOBS open-market activity in the last 12 months
- John Thomas Kilgallon - $46.50M of BOBS open-market activity in the last 12 months
- Adam Koppel - $25.00M of KLRA open-market activity in the last 12 months
- Bain Capital Life Sciences Investors, LLC - $25.00M of KLRA open-market activity in the last 12 months
- Giovanni Barbarossa - $18.08M of COHR 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
What is BAIN CAPITAL INVESTORS LLC?
BAIN CAPITAL INVESTORS LLC is an investment firm of Kailera Therapeutics, Inc. (KLRA). InsiderAlpha holds 6 primary Form 4 filings for it, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did BAIN CAPITAL INVESTORS LLC last file a Form 4?
The most recent primary Form 4 on record is dated 20 April 2026, one of 6 filings going back to 2024.
Has BAIN CAPITAL INVESTORS LLC been buying or selling stock?
Recorded transactions: 1 open-market purchase ($134.38M) and 5 open-market sales ($1.42B) across all tracked filings.
Where can I see all of BAIN CAPITAL INVESTORS LLC'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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