Suying Liu - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Suying Liu has filed 1 SEC Form 4 filing across 1 company in the last 90 days - active on both sides. Lifetime open-market purchases: $250K. Lifetime open-market sales: $1.00M.
Profile
Suying Liu serves as CEO and CFO of Mountain Crest Acquisition 6 Corp. (MCAH). Liu has also held reporting roles at Mountain Crest Acquisition Corp. V (MCAGU). Liu has reported 4 insider filings with the SEC since 2026. The most recent filing was in June 2026.
| Role | CEO and CFO, Director, 10% Owner |
|---|---|
| Notability | 50/100 |
Board memberships
- Mountain Crest Acquisition 6 Corp.
- Mountain Crest Acquisition Corp. V
Reported roles
- CEO and CFO
- CEO and CFO
Awards & honors
- Serves as director, CEO and CFO of MCAGU
- 10% ownership of MCAGU
Trading Pattern
InsiderAlpha's records for Suying Liu go back to 2026: 3 primary Form 4 filings, an average of 3.0 per year. The typical open-market purchase is $125K (2 buys totaling $250K). The largest single buy on record is $250K of MCAH in 2026. Sales side: 1 recorded sale totaling $1.00M, 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 Suying Liu 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.
- CEO and CFO, Director, 10% Owner at Mountain Crest Acquisition 6 Corp. (MCAH) - 2 filings, 2026
- CEO and CFO, Director, 10% Owner at Mountain Crest Acquisition Corp. V (MCAGU) - 1 filing, 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-06-26 | MCAH | Mountain Crest Acquisition 6 Corp. | J - Other acquisition / disposition | 385.7K | - | |
| 2026-05-05 | MCAH | Mountain Crest Acquisition 6 Corp. | P - Open-market purchase | 25.0K | $10.00 | $250K |
| 2026-01-02 | MCAGU | Mountain Crest Acquisition Corp. V | S - Open-market sale | 200.0K | $5.00 | $1.00M |
Companies - Last 90 Days
- Mountain Crest Acquisition 6 Corp. (MCAH) - 1 filing, last 2026-06-26
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Suying Liu 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.
- Mountain Crest Holdings 6 LLC - $250K of MCAH open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Donald William Swanson
- Synchron
- Kevin Tang
- Leonard M. Tannenbaum
- TCG Crossover GP II, LLC
- Tether Holdings, S.A. de C.V.
- Motor Corp/ Toyota
- TPG GP A, LLC
Frequently Asked Questions
Who is Suying Liu?
Suying Liu serves as CEO and CFO of Mountain Crest Acquisition 6 Corp. (MCAH). Liu has also held reporting roles at Mountain Crest Acquisition Corp. V (MCAGU). Liu has reported 4 insider filings with the SEC since 2026. The most recent filing was in June 2026.…
How many SEC Form 4 filings has Suying Liu submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Suying Liu been buying or selling stock?
Recorded transactions: 2 open-market purchases ($250K) and 1 open-market sale ($1.00M) across all tracked filings.
Where can I see all of Suying Liu'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 Suying Liu profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.