FinanceDraft
Artisan Mid Cap Fund adds Guardant Health on screening growth
Artisan Partners cited rising testing volumes, adoption of Guardant’s Shield test and higher revenue guidance when adding the diagnostics company in the second quarter.
Event
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand
Artisan Partners’ Artisan Mid Cap Fund added Guardant Health during the second quarter of 2026, citing its liquid biopsy diagnostics, cancer screening growth, rising testing volumes and raised revenue guidance.
2 published stories · markets · source reliability 33%
Background
Why this event matters
Artisan Partners’ Artisan Mid Cap Fund added Guardant Health during Q2 2026. The fund cited Guardant’s liquid-biopsy diagnostics, accelerating adoption of its Shield colorectal-cancer screening test, rising testing volumes and increased full-year revenue guidance. Guardant provides blood and tissue tests and oncology-related data sets. The account is a secondary report of an investor letter, and the investment rationale is attributed to Artisan.
event-brief
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand
Artisan Partners’ Artisan Mid Cap Fund added Guardant Health during Q2 2026. The fund cited Guardant’s liquid-biopsy diagnostics, accelerating adoption of its Shield colorectal-cancer screening test, rising testing volumes and increased full-year revenue guidance. Guardant provid
Reporting trail
Yahoo Finance | https://finance.yahoo.com/markets/stocks/articles/makes-guardant-health-gh-compelling-132246436.html | published 2026-09-08T13:22:46.000Z | primary sourceYahoo Finance report, “What Makes Guardant Health (GH) a Compelling Bet?” | Secondary account of Artisan Mid Cap Fund’s Q2 2026 letter and Guardant-related figures.Event digest | Concise identification of the new fund position and stated rationale.Retrieved context, cluster summary | Corroborates the event classification and market topic.Yahoo Finance | https://finance.yahoo.com/markets/stocks/articles/artisan-added-comfort-systems-usa-125646541.html | published 2026-09-08T12:56:46.000Z | primary sourceYahoo Finance / Insider Monkey article | Reports Artisan’s Q2 2026 investor-letter commentary and the addition of Comfort Systems USA.Event digest | Concise statement of the reported transaction and rationale.Retrieved context: cluster summary | Confirms the event framing and topic.Retrieved context: historical context and background cards | Related fund and market context; not directly relevant to this event.
Fact cards
entity brief
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand: key people and institutions
Key entities: Guardant Health, Artisan Partners, Artisan Mid Cap Fund, Comfort Systems USA.
faq brief
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand: key questions
Why did Artisan add Guardant Health? It cited liquid-biopsy diagnostics, cancer-screening growth, rising testing volumes and raised revenue guidance. What is Guardant Health’s Shield test? It is a colorectal-cancer screening test whose adoption the fund said was accelerating. Wha
source brief
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand: reporting sources
Yahoo Finance | https://finance.yahoo.com/markets/stocks/articles/makes-guardant-health-gh-compelling-132246436.html | published 2026-09-08T13:22:46.000Z | primary source | Yahoo Finance report, “What Makes Guardant Health (GH) a Compelling Bet?” | Secondary account of Artisan Mi
timeline brief
Artisan Mid Cap Fund adds Comfort Systems USA amid data centre demand: timeline
Q2 2026: Artisan Mid Cap Fund added Guardant Health. Q2 2026: The fund reported investor-class returns of 17.86%–17.93%, compared with 14.55% for the Russell Midcap Growth Index. End of Q2 2026: 80 hedge-fund portfolios reportedly held Guardant shares, up from 58 in the previous
Timeline
Q2 2026
Artisan Mid Cap Fund added Guardant Health.
Q2 2026
The fund reported investor-class returns of 17.86%–17.93%, compared with 14.55% for the Russell Midcap Growth Index.
End of Q2 2026
80 hedge-fund portfolios reportedly held Guardant shares, up from 58 in the previous quarter.
4 September 2026
Guardant closed at US$161.41, according to the report; its stated 52-week return was 168.28%.
8 September 2026
Yahoo Finance published the secondary report.
FAQ
Why did Artisan add Guardant Health?
It cited liquid-biopsy diagnostics, cancer-screening growth, rising testing volumes and raised revenue guidance.
What is Guardant Health’s Shield test?
It is a colorectal-cancer screening test whose adoption the fund said was accelerating.
What does Guardant Health provide?
Blood and tissue tests and oncology-related data sets.
Is this an independent investment recommendation?
No. The rationale is attributed to Artisan Partners and reported second-hand.
Why did the fund add Comfort Systems USA?
The fund cited data centre construction demand, earnings growth, margin expansion and raised full-year guidance.
What does Comfort Systems USA do?
It provides heating, ventilation and air conditioning, mechanical and electrical installation, maintenance, repair and replacement services.
How important are data centres to the company?
Artisan said hyperscaler-driven data centre construction accounted for a majority of revenue.
How large was the fund’s purchase?
The available material does not specify the size, timing or purchase price.