BlueMountain Capital Management, LLC
UK short positions the FCA published under this name: 10 companies and 67 disclosures between 3 Dec 2014 and 5 Sep 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.
TRAVIS PERKINS PLC
closed 5 Sep 20184 disclosures · peak 0.50% · first 20 Aug 2018 · last 5 Sep 2018
20 Aug 2018 0.50% · 30 Aug 2018 0.49% · 31 Aug 2018 0.50% · 5 Sep 2018 0.47%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
PENNON GROUP PLC
closed 4 Sep 201812 disclosures · peak 0.61% · first 5 Feb 2018 · last 4 Sep 2018
5 Feb 2018 0.50% · 16 Feb 2018 0.60% · 10 Apr 2018 0.57% · 2 May 2018 0.61% · 18 May 2018 0.59% · 15 Jun 2018 0.48% · 1 Aug 2018 0.50% · 6 Aug 2018 0.49% · 10 Aug 2018 0.50% · 22 Aug 2018 0.49% · 29 Aug 2018 0.50% · 4 Sep 2018 0.49%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
BABCOCK INTERNATIONAL GROUP PLC
closed 22 Aug 20188 disclosures · peak 0.60% · first 21 Dec 2017 · last 22 Aug 2018
21 Dec 2017 0.50% · 9 Jan 2018 0.49% · 1 Feb 2018 0.51% · 22 Feb 2018 0.60% · 23 Feb 2018 0.59% · 10 Apr 2018 0.48% · 30 Jul 2018 0.51% · 22 Aug 2018 0.49%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Inmarsat PLC
closed 27 Apr 20188 disclosures · peak 0.53% · first 6 Dec 2017 · last 27 Apr 2018
6 Dec 2017 0.50% · 27 Dec 2017 0.49% · 3 Jan 2018 0.53% · 23 Jan 2018 0.48% · 5 Feb 2018 0.50% · 7 Feb 2018 0.46% · 9 Apr 2018 0.52% · 27 Apr 2018 0.45%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
TULLOW OIL PLC
closed 21 Dec 20174 disclosures · peak 0.61% · first 28 Nov 2017 · last 21 Dec 2017
28 Nov 2017 0.50% · 15 Dec 2017 0.61% · 19 Dec 2017 0.58% · 21 Dec 2017 0.48%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
MELROSE INDUSTRIES PLC
closed 13 Dec 20172 disclosures · peak 0.50% · first 5 Dec 2017 · last 13 Dec 2017
5 Dec 2017 0.50% · 13 Dec 2017 0.49%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
Vanquis Banking Group Plc
closed 30 Nov 20177 disclosures · peak 1.00% · first 6 Oct 2017 · last 30 Nov 2017
6 Oct 2017 0.50% · 10 Oct 2017 0.62% · 12 Oct 2017 0.76% · 18 Oct 2017 0.81% · 15 Nov 2017 0.90% · 29 Nov 2017 1.00% · 30 Nov 2017 0.35%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
THE BERKELEY GROUP HOLDINGS PLC
closed 4 Aug 201717 disclosures · peak 0.70% · first 27 Nov 2015 · last 4 Aug 2017
27 Nov 2015 0.56% · 30 Nov 2015 0.63% · 25 Jan 2016 0.58% · 3 Feb 2016 0.64% · 24 Jun 2016 0.48% · 29 Jun 2016 0.53% · 26 Jul 2016 0.49% · 5 Aug 2016 0.56% · 9 Aug 2016 0.48% · 19 Aug 2016 0.53% · 2 Sep 2016 0.66% · 10 Oct 2016 0.50% · 14 Nov 2016 0.65% · 5 Jan 2017 0.70% · 2 Mar 2017 0.69% · 31 Mar 2017 0.57% · 4 Aug 2017 0.49%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
AGGREKO PLC
closed 18 Feb 20152 disclosures · peak 0.51% · first 5 Jan 2015 · last 18 Feb 2015
5 Jan 2015 0.51% · 18 Feb 2015 0.47%
The chain ends here: the register holds no later disclosure, which normally means the position fell back below 0.5%.
DERWENT LONDON PLC
closed 20 Jan 20153 disclosures · peak 1.58% · first 3 Dec 2014 · last 20 Jan 2015
3 Dec 2014 0.65% · 18 Dec 2014 1.58% · 20 Jan 2015 0.00%
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 BlueMountain Capital Management, LLC short?
- The FCA's named register recorded BlueMountain Capital Management, LLC against 10 UK companies between 2014 and 2026, across 67 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 BlueMountain Capital 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.