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ISSUER PROFILE · CIK 0001859690 · CUSIP G0567U127

Arqit Quantum Inc.ARQQW

8 13D/G filings 4 distinct filers 105 insider transactions (365d)

Post-Filing Returns · across 3 activist filings on this issuer

Median 30d
0.0%
avg 0.0%
Median 60d
0.0%
avg 0.0%
Median 90d
0.0%
avg 0.0%
Median 180d
0.0%
avg 0.0%

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

Cross-Reference Snapshot

Activist filings
8
1 SCHEDULE 13G · 1 SCHEDULE 13D/A · 2 SCHEDULE · 4 SC
Distinct filers
4
multi-activist cluster
Insiders (365d)
105
1 buys · 19 sales
Latest short DTC
1.00
as of 2026-08-31

13D/G Filings Timeline · 8 total

FiledFormFilerStakeSharesIntent
2026-06-23 SCHEDULE 13G ICS OPPORTUNITIES, LTD. — — view →
2026-05-26 SCHEDULE 13D/A Heritage Assets SCSp. 38.60% 9,249,963.8 view →
2025-11-12 SCHEDULE Heritage Assets SCSp. 41.80% 9,272,141 view →
2025-02-10 SCHEDULE Evolution Technology Fund II, SCSP. 3.10% 397,259 view →
2024-10-02 SC Heritage Assets SCSp. — — view →
2024-10-02 SC D2BW Ltd — — view →
2021-12-09 SC Heritage Assets SCSp. — — view →
2021-10-12 SC D2BW Ltd — — view →

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-10-16 Lefebvre d'Ovidio Manfredi director Option exercise 817 — —
2026-10-16 Lefebvre d'Ovidio Manfredi director Option exercise 817 — —
2026-10-15 Lefebvre d'Ovidio Manfredi director Award 817 — —
2026-10-05 Leaver Andrew officer Sale 2,535 $23.78 $60K
2026-10-05 Leaver Andrew officer J 5,209 — —
2026-10-05 Leaver Andrew officer Option exercise 5,208 — —
2026-10-05 Leaver Andrew officer J 2,818 $24.47 $69K
2026-10-05 Leaver Andrew officer J 5,209 — —
2026-10-05 Leaver Andrew officer Option exercise 5,208 — —
2026-10-05 Calabria Carlo director Option exercise 16 — —
2026-10-05 Calabria Carlo director Option exercise 66 — —
2026-10-05 Calabria Carlo director Option exercise 83 — —
2026-10-05 Calabria Carlo director Option exercise 16 — —
2026-10-05 Calabria Carlo director Option exercise 66 — —
2026-10-05 Calabria Carlo director Option exercise 83 — —
2026-10-05 Feenan Paul officer Option exercise 555 — —
2026-10-05 Feenan Paul officer Option exercise 157 — —
2026-10-05 Feenan Paul officer Option exercise 322 — —
2026-10-05 Feenan Paul officer Sale 533 $23.78 $13K
2026-10-05 Feenan Paul officer Option exercise 555 — —
2026-10-05 Feenan Paul officer Option exercise 157 — —
2026-10-05 Feenan Paul officer Option exercise 322 — —
2026-10-05 Lefebvre d'Ovidio Manfredi director Option exercise 1,111 — —
2026-10-05 Lefebvre d'Ovidio Manfredi director Option exercise 16 — —
2026-10-05 Lefebvre d'Ovidio Manfredi director Option exercise 66 — —
Showing 25 of 105

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-08-31 86,709 1.00 +633.8%
2026-08-14 11,816 1.00 +77.8%
2026-07-31 6,646 1.00 +12.3%
2026-07-15 5,916 1.00 -30.4%
2026-06-30 8,500 1.00 +207.9%
2026-06-15 2,761 1.00 -49.3%
2026-05-29 5,443 1.00 -66.3%
2026-05-15 16,133 1.00 +30.8%
2026-04-30 12,334 1.00 +40.9%
2026-04-15 8,756 1.00 -69.4%
2026-03-31 28,597 2.77 -12.6%
2026-03-13 32,714 1.93 -20.9%

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