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ISSUER PROFILE · CIK 0002088256 · CUSIP Y4000A102

Horizon Quantum Holdings Ltd.HQWWW

1 13D/G filings 1 distinct filers 6 insider transactions (365d)

Post-Filing Returns · across 1 activist filings on this issuer

Median 30d
+65.8%
avg +65.8%
Median 60d
+16.4%
avg +16.4%
Median 90d
avg —
Median 180d
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
1
1 SCHEDULE 13D
Distinct filers
1
single filer
Insiders (365d)
6
6 buys · 0 sales
Latest short DTC
1.00
as of 2026-05-29

13D/G Filings Timeline · 1 total

FiledFormFilerStakeSharesIntent
2026-04-01 SCHEDULE 13D IonQ, Inc. 13.30% 4,230,118 view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-03-19 Lambert Danielle director Buy 84,602 $11.82 $1000K
2026-03-19 Tan Si-Hui officer Award 500,000 $0.15 $75K
2026-03-19 Gould Greg officer Award 285,300 $5.13 $1.46M
2026-03-19 Fitzsimons Joseph Francis director, officer, 10%+ Award 19,744,585
2026-03-19 You Harry L. director, 10%+ Award 1,163,484
2026-03-19 You Harry L. director, 10%+ Award 2,884,660 $11.50 $33.17M

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-05-29 7,317 1.00 +31.3%
2026-05-15 5,573 1.00 -56.9%
2026-04-30 12,924 1.00 +233.7%
2026-04-15 3,873 1.00 +158.2%
2026-03-31 1,500 1.00 +100.0%

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