Citadel Securities LLC
UK short positions the FCA published under this name: 3 companies and 21 disclosures between 14 Feb 2019 and 15 Apr 2020. Each figure is that position as a percentage of the company's issued share capital, not a money value, and percentages are not comparable or summable across companies.
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Positions open when the register closed
No position was still open in the register's final snapshot of 10 Jul 2026: every chain below had already fallen back below the 0.5% publication threshold.
Full disclosure history
Every disclosure the archive holds, grouped by company and ordered oldest first within each chain. A chain begins when the position first crossed 0.5% and ends either at the freeze or at the last disclosure before it fell back below the threshold.
Motif Bio PLC
closed 15 Apr 202011 disclosures · peak 1.35% · first 14 Feb 2019 · last 15 Apr 2020
14 Feb 2019 0.60% · 15 Feb 2019 0.37% · 3 Dec 2019 0.64% · 5 Dec 2019 0.56% · 6 Dec 2019 0.88% · 9 Dec 2019 0.95% · 10 Dec 2019 0.77% · 12 Dec 2019 0.89% · 13 Dec 2019 1.18% · 16 Dec 2019 1.35% · 15 Apr 2020 0.00%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Biodexa Pharmaceuticals PLC
closed 15 Jan 20207 disclosures · peak 1.38% · first 19 Jul 2019 · last 15 Jan 2020
19 Jul 2019 0.87% · 23 Jul 2019 0.72% · 25 Jul 2019 0.03% · 8 Jan 2020 1.38% · 9 Jan 2020 1.23% · 13 Jan 2020 1.13% · 15 Jan 2020 0.21%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
VERONA PHARMA PLC
closed 13 Jan 20203 disclosures · peak 0.69% · first 27 Dec 2019 · last 13 Jan 2020
27 Dec 2019 0.69% · 2 Jan 2020 0.59% · 13 Jan 2020 0.14%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Frequently asked questions
- Which UK companies did Citadel Securities LLC short?
- The FCA's named register recorded Citadel Securities LLC against 3 UK companies between 2019 and 2026, across 21 disclosures. No position was still open when the register closed on 10 Jul 2026.
- Is this list current?
- No. It is a frozen archive. The FCA stopped publishing position-holder names on 13 July 2026 and now publishes one anonymous aggregate per company per day, so no new named UK disclosure exists after 10 Jul 2026. Today's UK figures are on each company's own page.
- Was this the whole of Citadel Securities LLC's UK short book?
- No. Only net short positions of 0.5% or more of a company's issued share capital were published with the holder's name. Smaller positions were reported to the FCA privately and never appeared in the register, so the archive is a floor, not a full book.
Source: the Financial Conduct Authority's daily short positions file, captured on 10 Jul 2026 from fca.org.uk and archived unchanged. Figures are as the FCA published them; this site is not affiliated with the FCA. Nothing here is investment advice.