UBS O'Connor Limited
UK short positions the FCA published under this name: 14 companies and 121 disclosures between 1 Nov 2012 and 10 Oct 2018. 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.
HUNTING PLC
closed 10 Oct 20187 disclosures · peak 0.71% · first 15 Aug 2018 · last 10 Oct 2018
15 Aug 2018 0.51% · 5 Sep 2018 0.60% · 6 Sep 2018 0.49% · 18 Sep 2018 0.54% · 25 Sep 2018 0.71% · 1 Oct 2018 0.54% · 10 Oct 2018 0.36%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
HALFORDS GROUP PLC
closed 6 Apr 20174 disclosures · peak 0.61% · first 7 Dec 2016 · last 6 Apr 2017
7 Dec 2016 0.53% · 4 Jan 2017 0.61% · 27 Mar 2017 0.57% · 6 Apr 2017 0.41%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
ROTORK P.L.C.
closed 24 Nov 201617 disclosures · peak 0.73% · first 23 Feb 2016 · last 24 Nov 2016
23 Feb 2016 0.55% · 1 Mar 2016 0.68% · 2 Mar 2016 0.73% · 21 Mar 2016 0.68% · 23 Mar 2016 0.72% · 6 Apr 2016 0.68% · 14 Apr 2016 0.59% · 22 Apr 2016 0.63% · 29 Apr 2016 0.59% · 3 May 2016 0.49% · 27 Jun 2016 0.52% · 9 Aug 2016 0.54% · 1 Sep 2016 0.65% · 7 Sep 2016 0.55% · 16 Sep 2016 0.49% · 9 Nov 2016 0.55% · 24 Nov 2016 0.44%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
WEIR GROUP PLC(THE)
closed 20 Jun 20168 disclosures · peak 0.60% · first 12 Jan 2015 · last 20 Jun 2016
12 Jan 2015 0.50% · 23 Jan 2015 0.42% · 28 Apr 2016 0.54% · 29 Apr 2016 0.46% · 1 Jun 2016 0.54% · 8 Jun 2016 0.60% · 17 Jun 2016 0.54% · 20 Jun 2016 0.48%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
MARSTON'S PLC
closed 30 Mar 20166 disclosures · peak 0.51% · first 31 Jul 2015 · last 30 Mar 2016
31 Jul 2015 0.50% · 12 Aug 2015 0.46% · 16 Sep 2015 0.51% · 22 Oct 2015 0.49% · 2 Dec 2015 0.50% · 30 Mar 2016 0.43%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
TELECOM PLUS PLC
closed 11 Feb 20164 disclosures · peak 0.50% · first 18 Jan 2016 · last 11 Feb 2016
18 Jan 2016 0.50% · 27 Jan 2016 0.49% · 29 Jan 2016 0.50% · 11 Feb 2016 0.46%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
PREMIER FOODS PLC
closed 25 Nov 201513 disclosures · peak 0.83% · first 20 May 2015 · last 25 Nov 2015
20 May 2015 0.50% · 28 May 2015 0.60% · 12 Jun 2015 0.72% · 1 Jul 2015 0.65% · 8 Jul 2015 0.71% · 28 Jul 2015 0.83% · 17 Aug 2015 0.73% · 29 Sep 2015 0.80% · 2 Oct 2015 0.69% · 10 Nov 2015 0.72% · 19 Nov 2015 0.66% · 20 Nov 2015 0.57% · 25 Nov 2015 0.00%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
HOME RETAIL GROUP
closed 26 Oct 201512 disclosures · peak 0.92% · first 10 Apr 2015 · last 26 Oct 2015
10 Apr 2015 0.55% · 30 Apr 2015 0.45% · 8 Jul 2015 0.52% · 15 Jul 2015 0.61% · 24 Jul 2015 0.71% · 9 Sep 2015 0.73% · 16 Sep 2015 0.79% · 23 Sep 2015 0.81% · 1 Oct 2015 0.92% · 8 Oct 2015 0.86% · 21 Oct 2015 0.55% · 26 Oct 2015 0.32%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Velocys PLC
closed 30 Jul 20156 disclosures · peak 0.60% · first 21 May 2015 · last 30 Jul 2015
21 May 2015 0.50% · 2 Jun 2015 0.60% · 1 Jul 2015 0.59% · 6 Jul 2015 0.60% · 28 Jul 2015 0.58% · 30 Jul 2015 0.47%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
IMAGINATION TECH GROUP PLC
closed 13 Jul 201510 disclosures · peak 0.61% · first 30 Mar 2015 · last 13 Jul 2015
30 Mar 2015 0.55% · 2 Apr 2015 0.60% · 23 Apr 2015 0.54% · 27 May 2015 0.61% · 1 Jun 2015 0.55% · 8 Jun 2015 0.49% · 11 Jun 2015 0.50% · 1 Jul 2015 0.46% · 8 Jul 2015 0.51% · 13 Jul 2015 0.42%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Capricorn Energy Plc
closed 26 Feb 201310 disclosures · peak 0.61% · first 1 Nov 2012 · last 26 Feb 2013
1 Nov 2012 0.55% · 12 Nov 2012 0.61% · 13 Nov 2012 0.61% · 15 Nov 2012 0.56% · 16 Nov 2012 0.32% · 8 Jan 2013 0.50% · 6 Feb 2013 0.60% · 13 Feb 2013 0.48% · 21 Feb 2013 0.53% · 26 Feb 2013 0.49%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Petropavlovsk PLC
closed 13 Feb 20132 disclosures · peak 0.51% · first 12 Feb 2013 · last 13 Feb 2013
12 Feb 2013 0.51% · 13 Feb 2013 0.41%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Fenner PLC
closed 29 Jan 201313 disclosures · peak 1.23% · first 1 Nov 2012 · last 29 Jan 2013
1 Nov 2012 1.21% · 6 Nov 2012 1.13% · 7 Nov 2012 1.23% · 13 Nov 2012 1.12% · 14 Nov 2012 0.98% · 15 Nov 2012 0.80% · 16 Nov 2012 0.67% · 5 Dec 2012 0.71% · 2 Jan 2013 0.55% · 4 Jan 2013 0.72% · 14 Jan 2013 0.68% · 22 Jan 2013 0.55% · 29 Jan 2013 0.48%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
AFREN PLC
closed 25 Jan 20139 disclosures · peak 0.72% · first 1 Nov 2012 · last 25 Jan 2013
1 Nov 2012 0.69% · 5 Nov 2012 0.70% · 9 Nov 2012 0.61% · 12 Nov 2012 0.54% · 13 Nov 2012 0.43% · 4 Jan 2013 0.50% · 23 Jan 2013 0.72% · 24 Jan 2013 0.66% · 25 Jan 2013 0.48%
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 UBS O'Connor Limited short?
- The FCA's named register recorded UBS O'Connor Limited against 14 UK companies between 2012 and 2026, across 121 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 UBS O'Connor Limited'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.