RE: DCF30 Mar 2026 13:21
I think Bioventix looks pretty undervalued at these levels.
This is the most enthusiastic management commentary we’ve seen on Tau/Neuro to date, with language like “clear causes for optimism that our revenues will grow significantly into the future.” That’s notable coming from Bioventix, who are usually very restrained.
Importantly, the enthusiasm is backed by numbers. Tau/Neuro royalties have grown sharply over the last three half‑years: £30k, £45k, and £150k for the six months ending Dec‑24, Jun‑25, and Dec‑25 respectively.
Peter Harrison almost never comments on valuation. He’s previously said words to the effect of “I make antibodies — you’re better placed to judge whether the share price is high or low.” That makes the strength and confidence of this commentary stand out even more.
Even if growth were to flatten from here, it’s hard to argue the shares aren’t undervalued. The business is exceptionally well insulated from inflation, and while some royalties (e.g. troponin) will eventually roll off, the remainder require no incremental investment, no capex, and no maintenance spend.
New antibodies typically take many years to commercialise, but Tau/Neuro seems to be progressing very well already, with around half of the major diagnostic players now using Bioventix antibodies in their assay designs.
For a capital‑light business with strong cash generation, durable royalties, and increasingly credible future growth, the current valuation feels hard to justify.