Jonathan Brassington
Director · SEI INVESTMENTS CO
Individual
- 2024
- Dec 16, 2025
- 2
Filings (90d)
Other insiders active in the same stocks
Insiders who reported open-market trades in the last 12 months at the companies Jonathan Brassington 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.
- Alfred P. West Jr. - $15.51M in SEIC purchases and sales in the last 12 months
- Ryan Hicke - $11.14M in SEIC purchases and sales in the last 12 months
- Michael Peterson - $9.74M in SEIC purchases and sales in the last 12 months
- Philip McCabe - $4.53M in SEIC purchases and sales in the last 12 months
- Sanjay Sharma - $4.24M in SEIC purchases and sales in the last 12 months
- Kathryn McCarthy - $1.95M in SEIC purchases and sales in the last 12 months
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Frequently asked questions
Who is Jonathan Brassington?
Jonathan Brassington is a corporate insider, tracked as Director of SEI INVESTMENTS CO (SEIC). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did Jonathan Brassington last file a Form 4?
The most recent primary Form 4 on record is dated 16 December 2025, one of 2 filings going back to 2024.
