McIntyre Partnerships’ Analysis on QuidelOrtho Corporation (QDEL)
McIntyre Partnerships’ Q1 2026 investor letter said its fund fell 19% gross and 20% net, citing a broad pullback in life science tools/medical device stocks and stock-specific issues at QuidelOrtho (QDEL). The fund reported 123% long, 27% short, and 97% net exposure by month-end; QDEL was its largest position. QDEL closed at $13.02 on May 29, 2026; the firm reported $620 million revenue in Q1 2026.
How this was made

The 30-second read
Why it matters
For QDEL, the main market signal is concentrated positioning and downside-limited options usage by one investor, not a company-reported event. The sector context suggests broader risk-off in life-science tools.
Market read
Primarily sentiment/positioning commentary on QDEL and the life-science tools complex; no new fundamental catalyst is disclosed.
What to watch
Sector drawdown could be driven by macro/positioning rather than QDEL-specific fundamentals; without new disclosures, traders may over-weight the letter’s conviction.
Background
The piece summarizes McIntyre Partnerships’ Q1 2026 investor letter, highlighting fund performance and attributing drawdowns to life-science tools/medical device weakness plus stock-specific issues at QDEL.
Ticker impact
McIntyre Partnerships cites QDEL-specific issues and says it sized up to a full position after a sharp share pullback in Q1 2026.
Near-term trading impact is likely limited; however, the narrative could support dip-buying/volatility interest around QDEL if traders treat it as a contrarian signal.
No new corporate event (earnings, guidance, deal, regulatory action) is provided; the actionable element is sentiment/positioning commentary tied to Q1 drawdown and sector read-through.
Market effects
Reinforces negative sentiment toward life-science tools/diagnostics amid AI-driven drug-development fears, even if QDEL is described as not directly tied to drug development.
None specified beyond US small/mid-cap style exposure.
None specified.
Counterpoint
The “once-in-5-to-10-year opportunity” framing may attract contrarian flows, but it’s still based on an investor’s thesis rather than new fundamentals.
Key entities
- public_companyQuidelOrtho Corporation
Diagnostic testing solutions company; discussed as a concentrated position with Q1 underperformance and investor conviction.
- investment_fundMcIntyre Partnerships
US-based investment company whose Q1 letter frames QDEL as a contrarian opportunity and describes fund exposure/positioning.


