SDI Limited's Long-Held Value Story Ends In A China Takeover

Fund managers trace a multi-year holding from masked segment growth to a completed scheme of arrangement

30 Jun 2026 · 6 min read

A long-running small-cap value story reached its conclusion in June 2026, when Cromwell Funds Management reported that SDI Limited, a founder-led Melbourne dental materials manufacturer, was formally acquired after its scheme of arrangement became effective on 26 June. The manager said Chairman and founder Jeffery Cheetham, who started the business in 1972, remains a substantial shareholder alongside his daughter Samantha Cheetham, the company's CEO, with the Cheetham family holding around 45 per cent of the register.

The acquirer, an entity controlled by Shandong Sinocera Functional Material Co. Ltd, a Shenzhen-listed advanced materials group, made strategic sense to Cromwell Funds Management given SDI had long eyed expansion into the Chinese dental market, an opportunity typically requiring a local partner. The scheme consideration of $1.40 cash per share represented a 58 per cent premium to the undisturbed closing price of 88.5 cents, valuing SDI's equity at approximately $166 million, implying a multiple of close to 8 times normalised EBITDA.

The opportunity to acquire shares in SDI at attractive prices likely existed for two reasons: the masked growth in headline numbers, and thin trading liquidity given the small free float outside the Cheetham family's holding.

— Cromwell Funds Management, Quarterly Report, June 2026

Growth that headline numbers had been hiding

That masked growth was the core of the original investment case. DMX Asset Management, describing the business in October 2025, said SDI's legacy Amalgam dental filling product, in which the company once held an estimated 60 per cent global market share, had been in structural decline for years, but that decline had obscured genuinely strong growth in the company's Aesthetics and Whitening segments, with gross margins creeping up to 63 per cent. Mereweather Capital made the same point in July 2025, estimating SDI's core segments had grown around 6 per cent in the second half once the Amalgam headwind was stripped out, at a time the stock traded on just 10 times earnings.

Looking through those headwinds I estimate SDI's core segments grew ~6% in the second half, below the 12% CAGR of the last decade but still a solid result. At the current market capitalisation of $100m, SDI trades on just 10x earnings despite the consistent growth after backing out the declining Amalgam segment.

— Mereweather Capital, Monthly Report, July 2025

A takeover bid that split opinion on FIRB risk

The scheme implementation deed was announced alongside SDI's half-year results in February 2026, with NorthStar Impact Funds noting the $1.40 offer represented a 65 per cent premium to the pre-announcement share price and had unanimous board support, including from the founder. Not every long-term holder waited for the deal to complete. Merewether Capital began exiting its position at a slight discount to the bid price in early March 2026, citing both a weaker-than-expected half-year result and genuine uncertainty around Foreign Investment Review Board approval given the bidder was a Chinese entity and FIRB had blocked similar situations before. DMX Asset Management made a similar calculation in March, exiting in the $1.25 to $1.30 range versus the $1.40 offer price, arguing the odds of a higher offer were remote and the risk of the deal falling over was non-trivial given the deteriorating macro backdrop and required regulatory approvals in the US and Europe.

A profitable multi-year holding

For those who held through the process, the outcome vindicated years of patience. NorthStar Impact Funds said it had been invested in SDI since February 2020 at an initial entry price of 85 cents and an average cost of 91 cents, having also collected 13.3 cents per share in dividends along the way. Cromwell Funds Management's own position, first acquired in September 2020 at around 73 cents, delivered what it described as a successful outcome for the fund, even after largely selling down its holding ahead of the scheme's effective date on concerns, which it acknowledged may have been overly cautious, about deal completion risk.

What the deal means for remaining shareholders

With the scheme now effective and SDI delisted from the ASX, the story that played out for managers here illustrates a recurring small-cap dynamic: a business whose true growth was obscured by a declining legacy product line, trading at an undemanding multiple with thin liquidity, ultimately attracted a strategic acquirer willing to pay a substantial premium for exactly the qualities patient long-term holders like Cromwell Funds Management and NorthStar Impact Funds had been buying for years.