River UK Micro Cap Reports 22.3% NAV Growth and 17% Discount in Year-End Update

River UK Micro Cap's NAV surged 22.3%, beating the benchmark, with shares at a 17% discount – a compelling investment opportunity.

6 October 2025by Joshua Thompson5 min read60 views

This article covers information on River UK Micro Cap Ltd.

LON:RMMC

River UK Micro Cap’s 12-month result: +22.3% NAV and a big win over the benchmark

River UK Micro Cap Limited (RMMC) has posted a strong year-end trading update for the 12 months to 30 September 2025. Net asset value (NAV) per share rose 22.3%, beating its benchmark – the Numis Small Cap inc AIM ex ITs – which returned 8.3%. That is 14.1% of outperformance, putting the trust in the top decile of the AIC UK Smaller Companies sector over the period.

It is not just a one-year story, either. Since IPO in December 2014, RMMC has delivered a 12.8% internal rate of return (IRR) after all fees, versus a 5.6% annualised benchmark return. NAV growth has beaten the benchmark in 9 of 11 financial periods, underperforming only in FY2019 and FY2022.

Quick refresher on the jargon

NAV per share: the value of the portfolio minus liabilities, divided by shares in issue.
IRR: internal rate of return, a time-weighted measure that adjusts for capital returned to shareholders.
Discount to NAV: when the share price trades below the NAV per share. A 17% discount means £1 of assets can be bought for 83p in the market.
ppt: percentage points – the absolute difference between percentages.

Key numbers investors should know

Metric	Figure
12-month NAV per share return	+22.3%
Benchmark (Numis Small Cap inc AIM ex ITs)	+8.3%
Outperformance vs benchmark	+14.1%
NAV per share (30 Sep 2025)	248.9p
Share price discount to NAV	17%
IRR since inception (after all fees)	12.8%
Benchmark annualised return since inception	5.6%
Portfolio free cash flow yield	7.0% (8.5% when adjusted for the current discount)

Why the 17% discount to NAV matters now

Despite the outperformance, the shares still trade at a 17% discount to the 248.9p NAV per share. Management has reiterated a long-term commitment to returning capital to shareholders. Combined with a portfolio-level free cash flow yield of 7% (rising to 8.5% when you factor in the discount), that is a punchy setup for potential discount narrowing if sentiment improves.

In plain English: you are buying a portfolio of cash-generative, net cash businesses at a double-digit markdown. If performance stays solid and buybacks or other capital returns continue, the gap can close. Not guaranteed, but the ingredients are there.

Portfolio standouts: big winners and takeover premiums

Stock selection did the heavy lifting. The biggest positive contributors were:

Serabi Gold: +265%, adding 4.2ppt to relative performance.
DF Capital: +80%, +3.5ppt contribution.
ActiveOps: +51%, +2.9ppt contribution.
Gear4Music: +72%, +2ppt contribution.

There was also a healthy dose of M&A support. Aquis, Renold, Science in Sport and Windward were all bid for by strategic or financial buyers, with premiums to 30 September 2024 prices of 96%, 54%, 39% and 60% respectively. That sort of corporate activity is exactly the tailwind micro caps can benefit from when private equity and trade buyers go bargain-hunting.

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Fresh ideas: five new positions already up on average

RMMC initiated five new holdings over the year, with an average gain of 24% from the trust’s average purchase price to 30 September 2025. The new names add breadth across industrial technology, software and specialist materials:

Dialight – industrial LED lighting.
Microlise – enterprise software for fleet operators.
Sylvania Platinum – low-cost producer of platinum group metals from chrome tailings.
Tracsis – mission-critical software and hardware for the rail industry.
Trifast – qualified industrial fasteners and outsourced supply chain solutions.

Early gains are nice, but the bigger point is positioning: these are operationally geared, niche players where fundamentals can drive multi-year value, especially if the small-cap cycle turns up.

Long-term track record: consistency since the 2014 IPO

Since inception, the trust’s 12.8% IRR (after fees) has outpaced the benchmark’s 5.6% annualised return. NAV growth has topped the benchmark in 9 of 11 financial periods, only slipping in FY2019 and FY2022. The trust sits top quartile within the AIC UK Smaller Companies sector over the long run, which is a useful quality marker for style-persistent investors.

What the manager is saying about the cycle for small caps

Partner and Portfolio Manager George Ensor points to a gap between depressed sentiment and improving company fundamentals and earnings. He highlights a portfolio of businesses with net cash balance sheets and strong free cash flow generation, and believes we are at or near the start of a new global cycle of small-cap outperformance.

If that call is right, RMMC’s strategy – focused on inefficiencies among UK micro caps – should be well placed. It also helps explain the ongoing commitment to retire equity, which can compound NAV per share if done at a discount.

Join the investor webinar for deeper detail

RMMC will host a live quarterly investor webinar on 15 Oct 2025 at 10:00 BST via Investor Meet Company. You can register here:

My take: what’s to like, and what to watch

Reasons to be positive

Strong 12-month outperformance: +22.3% NAV vs +8.3% benchmark, top decile in sector.
Proven long-term execution: 12.8% IRR since inception, 9 of 11 periods ahead of the benchmark.
Supportive portfolio mix: emphasis on net cash, free cash flow, and operational progress.
Discount opportunity: 17% discount to a 248.9p NAV, with an explicit commitment to return capital.
M&A and stock picking: multiple bid situations and standout contributors show alpha generation.

Things to keep an eye on

Sentiment is still “depressed” in UK small and micro caps, per the manager. That can keep discounts wider for longer.
Key portfolio details such as gearing, ongoing buyback quantum and precise capital return mechanics are not disclosed here – look for the Annual Report for fuller context.
New positions have started well, but sustaining gains will hinge on continued delivery from the underlying companies.

Bottom line

This is an upbeat update from River UK Micro Cap. A double-digit NAV gain, clear outperformance, and several stock-specific wins underpin the story. The 17% discount to a cash-generative portfolio – alongside a stated commitment to return capital – is the swing factor. If the manager’s view on a new small-cap cycle plays out, there is room for both NAV growth and discount narrowing. If sentiment stays stuck, the discount may linger, but the trust’s long-term track record gives it the benefit of the doubt.