Latest filingSep 16, 2026Most recent Form 4
HQ
Horizon Quantum Holdings Ltd.
NasdaqTechnologyServices-Computer Programming Services
Insider activity for last month from 08/16 to 09/16. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$00 sells
Net open-market+$05 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period14transactions
- M · Option exercise · dominant8 · 57%
- D · Issuer dispositions4 · 29%
- A · Grants / awards2 · 14%
Activity by reported role
A joint filing can contribute to multiple roles14transactions
- CSO · dominant4 · 29%
- CC3 · 21%
- Chief executive officer3 · 21%
- Chief financial officer3 · 21%
- CPO1 · 7%
Distinct insiders active
Reporting-owner CIKs by month · peak Sep 2026 (4)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeFitzsimons Joseph FrancisClass A Ordinary Shares · Direct
10,883Sep 12, 2026
Tan Si-HuiClass A Ordinary Shares · Direct
2,737Sep 12, 2026
Gould GregClass A Ordinary Shares · Direct
2,165Sep 12, 2026
Fitzsimons Catherine MicheleClass A Ordinary Shares · Direct
2,148Sep 12, 2026
Chew Qian Yi AmandaRestricted Stock Unit · Direct
17,857Aug 17, 2026
Tan Si-HuiClass A Ordinary Shares · Indirect · By Spouse
3,600Aug 20, 2026
Fitzsimons Joseph FrancisRestricted Stock Unit · Direct
214,827Sep 12, 2026
Tan Si-HuiRestricted Stock Unit · Direct
85,931Sep 12, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 16 → Sep 16
LessMore
Top insiders
By absolute net value across the selected period- FF-$52.3k
- TS-$45.5k
- GG-$19.4k
- FM-$17.1k
- CA+$0
Recent filing activity
Most recent 12 transactions · color = transaction code- AGrant09/16$0SEC
- MOption exercise09/16$0SEC
- DIssuer disposition09/16-$1.70MSEC
- MOption exercise09/16$0SEC
- MOption exercise09/16$0SEC
- DIssuer disposition09/16-$1.93MSEC
- MOption exercise09/16$0SEC
- MOption exercise09/16$0SEC
- DIssuer disposition09/16-$4.55MSEC
- MOption exercise09/16$0SEC
- AGrant09/16$0SEC
- MOption exercise09/16$0SEC
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
No filing-only signal badges matched this period.
HQ transaction history
Filters apply within this company and selected period by defaultLatest insider transactions
Form 4 filings from last month. Click any column to sort; click it again to flip the order.
| ID | Ticker | Insider | Role | Type | Shares | Value | Code | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|
| #220735 | HQ | Chew Qian Yi Amanda | CPO | grant | 17.8k | $0 | A | 09/16 | 08/17 |
| #220391 | HQ | Fitzsimons Catherine Michele | CC | exercise | 2.14k | $0 | M | 09/16 | 09/12 |
| #220389 | HQ | Fitzsimons Catherine Michele | CC | return | 1.12k | -$1.70M | D | 09/16 | 09/12 |
| #220388 | HQ | Fitzsimons Catherine Michele | CC | exercise | 2.14k | $0 | M | 09/16 | 09/12 |
| #220369 | HQ | Gould Greg | CFO | exercise | 3.43k | $0 | M | 09/16 | 09/12 |
| #220367 | HQ | Gould Greg | CFO | return | 1.27k | -$1.93M | D | 09/16 | 09/12 |
| #220366 | HQ | Gould Greg | CFO | exercise | 3.43k | $0 | M | 09/16 | 09/12 |
| #220349 | HQ | Tan Si-Hui | CSO | exercise | 5.72k | $0 | M | 09/16 | 09/12 |
| #220346 | HQ | Tan Si-Hui | CSO | return | 2.99k | -$4.55M | D | 09/16 | 09/12 |
| #220345 | HQ | Tan Si-Hui | CSO | exercise | 5.72k | $0 | M | 09/16 | 09/12 |
| #220344 | HQ | Tan Si-Hui | CSO | grant | 3.60k | $0 | A | 09/16 | 08/20 |
| #220254 | HQ | Fitzsimons Joseph Francis | CEO | exercise | 14.3k | $0 | M | 09/16 | 09/12 |
| #220252 | HQ | Fitzsimons Joseph Francis | CEO | return | 3.43k | -$5.23M | D | 09/16 | 09/12 |
| #220251 | HQ | Fitzsimons Joseph Francis | CEO | exercise | 14.3k | $0 | M | 09/16 | 09/12 |
Horizon Quantum Holdings Ltd. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Horizon Quantum Holdings Ltd.?
Chew Qian Yi Amanda, Fitzsimons Catherine Michele, Gould Greg, Tan Si-Hui, Fitzsimons Joseph Francis.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
No code-S sale is available for this period.
What is the recent purchase and sale balance?
No code-P purchases or code-S sales were reported in the selected period.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.