$MTSI

Does he own it?

No first-person buy/hold/add/size statement for MTSI anywhere. It is consistently invoked as a large-cap comparable (alongside LITE, COHR) to argue his actual conviction long, SIVE, is mispriced. Disclosed positions are in SIVE and IQE. One vague "I own most, not all" of a CPO list leaves MTSI ambiguous and explicitly non-committal.

His thesis

MTSI is treated as an established multi-billion-dollar CW/EML laser and analog/mixed-signal supplier in the AI photonics supply chain, repeatedly used as a valuation benchmark to show how cheap his real pick (SIVE) is. He is structurally bullish on the laser/CPO bottleneck MTSI sits in, and later highlights MTSI's $45M strategic investment into IQE as validating the epiwafer-chokepoint thesis. But MTSI is also framed as a SIVE competitor that Ayar removed from its supplier list, never as a personal holding.

How his view evolved

Early on a "sleeper" indirect beneficiary, then recurringly a tens-of-billions comp to frame SIVE's upside, and finally a corporate actor de-risking IQE via its investment. Sentiment stays positive but supportive of his SIVE/IQE theses, not MTSI itself.

Key points

• Used mainly as a large-cap valuation comp to argue SIVE is mispriced, not as a holding
• No explicit first-person ownership/sizing of MTSI; disclosed longs are SIVE and IQE
• Praised for its strategic stake in IQE, reinforcing his epiwafer-chokepoint thesis

Derived from a holistic read of his public posts — paraphrased, never quoted. See his actual posts about $MTSI on X ↗