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.
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:
Register for the River UK Micro Cap webinar
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.
