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Summit Partners Concentrated Growth L/S Master Fund, L.P.

UK short positions the FCA published under this name: 1 company and 8 disclosures between 29 May 2018 and 2 Jul 2019. 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.
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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.

Frequently asked questions

Which UK companies did Summit Partners Concentrated Growth L/S Master Fund, L.P. short?
The FCA's named register recorded Summit Partners Concentrated Growth L/S Master Fund, L.P. against 1 UK company between 2018 and 2026, across 8 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 Summit Partners Concentrated Growth L/S Master Fund, L.P.'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.