Jeffrey Jin Hyung Park - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 4, 2026
Jeffrey Jin Hyung Park has filed 2 SEC Form 4 filings across 1 company in the last 90 days - active on both sides. Lifetime open-market purchases: $26K. Lifetime open-market sales: $133K.
Profile
Jeffrey Jin Hyung Park holds the role of Chief Investment Officer at ProCap Financial, Inc. (BRR). Park has reported 8 insider filings with the SEC since 2025. The most recent filing was in May 2026.
| Role | Chief Investment Officer |
|---|---|
| Notability | 34/100 |
Board memberships
- ProCap Financial, Inc.
Reported roles
- Chief Investment Officer
Trading Pattern
InsiderAlpha's records for Jeffrey Jin Hyung Park go back to 2025: 6 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $26K (1 buy totaling $26K). The largest single buy on record is $26K of BRR in 2025. Sales side: 3 recorded sales totaling $133K, 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.
Career & Filing History
Every role Jeffrey Jin Hyung Park has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Chief Investment Officer at ProCap Financial, Inc. (BRR) - 6 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-27 | BRR | ProCap Financial, Inc. | S - Open-market sale | 21.1K | $1.60 | $34K |
| 2026-05-27 | BRR | ProCap Financial, Inc. | S - Open-market sale | 254 | $1.65 | $419 |
| 2026-05-21 | BRR | ProCap Financial, Inc. | S - Open-market sale | 51.0K | $1.93 | $98K |
| 2026-05-21 | BRR | ProCap Financial, Inc. | F - Tax withholding / forfeiture | 41.4K | $2.00 | $83K |
| 2026-05-05 | BRR | ProCap Financial, Inc. | A - Grant or award | 400.0K | $0.00 | |
| 2026-03-25 | BRR | ProCap Financial, Inc. | F - Tax withholding / forfeiture | 102.7K | $2.62 | $269K |
| 2026-03-25 | BRR | ProCap Financial, Inc. | A - Grant or award | 200.0K | $0.00 | |
| 2025-12-22 | BRR | ProCap Financial, Inc. | P - Open-market purchase | 8.2K | $3.20 | $26K |
| 2025-12-09 | BRR | ProCap Financial, Inc. | J - Other acquisition / disposition | 500.0K | - |
Companies - Last 90 Days
- ProCap Financial, Inc. (BRR) - 2 filings, last 2026-05-27
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Jeffrey Jin Hyung Park has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Anthony John Pompliano III - $1.00M of BRR open-market activity in the last 12 months
- William H. Miller IV - $97K of BRR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Jan Philipp Jenisch
- Marc Johnson
- James Jones
- Andrew T. Kaplan
- A. J. Kazimi
- Michael John Kazley
- Kennedy Lewis Investment Holdings II LLC
- KENNEDY LEWIS MANAGEMENT LP
Frequently Asked Questions
Who is Jeffrey Jin Hyung Park?
Jeffrey Jin Hyung Park holds the role of Chief Investment Officer at ProCap Financial, Inc. (BRR). Park has reported 8 insider filings with the SEC since 2025. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Jeffrey Jin Hyung Park submitted recently?
2 primary Form 4 filings in the last 90 days, covering 1 company.
Has Jeffrey Jin Hyung Park been buying or selling stock?
Recorded transactions: 1 open-market purchase ($26K) and 3 open-market sales ($133K) across all tracked filings.
Where can I see all of Jeffrey Jin Hyung Park'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
Open the live Jeffrey Jin Hyung Park profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.