Osterweis Capital Management’s Guardant Health GH Stock Holding History

Osterweis Capital Management’s Portfolio GH Stock Details GH Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$13.8M	Buy	148,946 +13,010	+10%	+$1.31M	0.71%	47
2025 Q4	$13.9M	Sell	135,936 -79,075	-37%	-$7.07M	0.59%	47
2025 Q3	$13.4M	Sell	215,011 -25,305	-11%	-$1.38M	0.61%	47
2025 Q2	$12.5M	Sell	240,316 -56,255	-19%	-$2.51M	0.6%	48
2025 Q1	$12.6M	Buy	+296,571	New	+$12.8M	0.62%	53
2021 Q1	–	Sell	-39,850	Closed	-$5.14M	–	139
2020 Q4	$5.14M	Buy	39,850 +16,230	+69%	+$1.87M	0.31%	82
2020 Q3	$2.64M	Buy	+23,620	New	+$2.16M	0.18%	91
2020 Q2	–	Sell	-45,220	Closed	-$3.15M	–	118
2020 Q1	$3.15M	Buy	45,220 +10,690	+31%	+$820K	0.26%	72
2019 Q4	$2.7M	Buy	+34,530	New	+$2.49M	0.19%	79

Other funds holding GH

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Osterweis Capital Management's GH Position: Q1 2026 in Review

Osterweis Capital Management increased its Guardant Health (GH) stake by 9.6% in Q1 2026, buying an estimated $1.31M and bringing the position to 148,946 shares worth $13.8M. The position accounts for 0.71% of the portfolio, ranked #47.

Osterweis Capital Management first reported a position in GH in Q4 2019 and has held it in 9 quarters since. The position peaked at $13.9M in Q4 2025. 481 funds tracked by Wall St. Rank hold GH as of Q1 2026.

Osterweis Capital Management held 148,946 shares of Guardant Health worth $13.8M as of Q1 2026.
Osterweis Capital Management bought 13,010 Guardant Health shares in Q1 2026, an estimated $1.31M.
Guardant Health made up 0.71% of Osterweis Capital Management's portfolio in Q1 2026, its #47 holding.
Osterweis Capital Management first reported a position in Guardant Health in Q4 2019 and has held it in 9 quarters since.
Osterweis Capital Management's Guardant Health position peaked at $13.9M in Q4 2025.
481 funds tracked by Wall St. Rank held Guardant Health as of Q1 2026.

Based on Osterweis Capital Management's 13F filing for Q1 2026, filed 15 May 2026.