Summary
Updated Aug 31, 2026
Michelle Ann Mattson has 3 SEC Form 4 filings on record, most recently on 20 July 2026. Lifetime open-market purchases: $185K. Lifetime open-market sales: $46K.
Recent Transactions
4Every recent SEC Form 4 transaction Michelle Ann Mattson has reported, most recent first.
- Keystone Private Income FundS - Open-market sale
102 shares @ $97.90$10K
- Keystone Private Income FundS - Open-market sale
363 shares @ $97.90$36K
- Keystone Private Income FundP - Open-market purchase
1.7K shares @ $98.05$165K
- Keystone Private Income FundP - Open-market purchase
203 shares @ $98.58$20K
Trading Pattern
InsiderAlpha's records for Michelle Ann Mattson go back to 2026: 3 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $93K (2 buys totaling $185K). Sales side: 2 recorded sales totaling $46K, so the filing history runs buy-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.
Most Active Insiders Right Now
Michelle Ann Mattson has no co-filers on record, so these are insiders with the largest open-market activity across the market in the last 90 days.
- Blackstone Holdings II L.P. - $705.06M of JMKE open-market activity in the last 90 days
- Submarine Buyer LLC - $705.06M of JMKE open-market activity in the last 90 days
- CASCADE INVESTMENT, L.L.C. - $685.25M of RSG open-market activity in the last 90 days
- BDT CAPITAL PARTNERS, LLC - $589.61M of ALH open-market activity in the last 90 days
- Joseph Gebbia - $510.90M of ABNB open-market activity in the last 90 days
- ORCP III DE TopCo GP, LLC - $497.40M of PRMB open-market activity in the last 90 days
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Michelle Ann Mattson?
Michelle Ann Mattson is a corporate insider, tracked as Secretary. InsiderAlpha holds 3 primary Form 4 filings for them, the earliest from 2026, updated as new SEC EDGAR filings are processed.
When did Michelle Ann Mattson last file a Form 4?
The most recent primary Form 4 on record is dated 20 July 2026, one of 3 filings going back to 2026.
Has Michelle Ann Mattson been buying or selling stock?
Recorded transactions: 2 open-market purchases ($185K) and 2 open-market sales ($46K) across all tracked filings.
Where can I see all of Michelle Ann Mattson'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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