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Acadian Asset Management LLC

UK short positions the FCA published under this name: 24 companies and 171 disclosures between 24 May 2019 and 9 Jul 2026. 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.

Frozen archive. This is the pre-2026 UK named register, which stopped on 10 Jul 2026. The FCA now publishes aggregate positions only, with no holder names, so this page can never gain a new disclosure. See how UK disclosure changed in 2026. Live UK figures are on the company pages, linked below where a company is still reportable.

This name still appears in the European registers, which do publish holders: current positions for Acadian Asset Management LLC. The two datasets are kept separate and never combined.

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Positions open when the register closed

7 positions of 0.5% or more still disclosed in the register's final snapshot, 10 Jul 2026.

CompanyPositionPosition date
IBSTOCK PLC1.28%9 Jul 2026
CREST NICHOLSON HOLDINGS PLC1.21%7 Jul 2026
CAPITA PLC0.93%18 May 2026
Pinewood Technologies Group Plc0.73%2 Apr 2026
GENUIT GROUP PLC0.61%30 Jun 2026
ESSENTRA PLC0.59%29 Jun 2026
YELLOW CAKE PLC0.51%8 Jul 2026

"Position date" is the date the holder's last disclosure applied to, not the date the position was opened.

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.

Frequently asked questions

Which UK companies did Acadian Asset Management LLC short?
The FCA's named register recorded Acadian Asset Management LLC against 24 UK companies between 2019 and 2026, across 171 disclosures. 7 positions were still open when the register closed on 10 Jul 2026, the largest 1.28% of IBSTOCK PLC.
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 Acadian Asset Management 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.