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Si-hui Tan
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Si-hui Tan
HQ
CHIEF SCIENCE OFFICER · HORIZON QUANTUM HOLDINGS LTD. · CIK 0002120880
Watchlist
FILING MIX · LIFETIME
100%
/
0%
BUYS
1
SELLS
0
TOTAL VALUE
$0
COMPANIES
1
ACTIVE SINCE
Mar 2026
HOLDINGS NOW
500,000
AVG SELL PX
—
TRADE KIND
ALL
OPEN MARKET
0
10B5-1 PLANNED
0
GRANTS
1
OTHER
0
SHOWING
1
/ 1
Trades · vs SPY
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Performance · forward returns vs SPY
No backtest data available for Si-hui Tan. Backtests are computed for purchase (P) and sale (S) transactions with resolvable price history.
Holdings over time
Not enough transaction history to chart holdings.
Trading cadence · quarterly flow
BUY
●
SELL
●
2026
FLOW ·
1 buys / 0 sells
COVERAGE ·
1 quarters
Form 4 filings · all activity
ALL · 1
BUYS · 1
SELLS · 0
COMPANY
TYPE
SHARES
PRICE
VALUE
HELD AFTER
TRADE DATE
FILED
HQ
HORIZON QUANTUM HOLDINGS LTD.
PURCHASE
GRANT
Stock grant
500,000
—
—
500,000
Mar 19, 2026
Mar 25, 2026 ↗
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About this filer
CIK 0002120880
ROLE
Chief Science Officer
PRIMARY
HQ
COMPANIES
1
ACTIVE SINCE
Mar 2026
FREE · DAILY · 6 AM ET
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One short email. Insider buys, congressional trades, and plain-English analysis.
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