Michelle Ann Mattson
Secretary · Keystone Private Income Fund
- 2026
- Jul 20, 2026
- 3
Summary
Latest filing:
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
Most active insiders across the market
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.
- BERKSHIRE HATHAWAY INC - $595.29M in LEN purchases and sales in the last 90 days
- BDT CAPITAL PARTNERS, LLC - $589.61M in ALH purchases and sales in the last 90 days
- DST Global Advisors Ltd - $535.19M in CHYM purchases and sales in the last 90 days
- ORCP III DE TopCo GP, LLC - $497.40M in PRMB purchases and sales in the last 90 days
- Tony W. Lee - $497.40M in PRMB purchases and sales in the last 90 days
- Argon Holdco LLC - $491.11M in CRBG purchases and sales in the last 90 days
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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.