Castleark Management’s Guardant Health GH Stock Holding History

Castleark 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 Q2	$12M	Sell	80,293 -79,990	-50%	-$8.7M	0.32%	59
2026 Q1	$14.8M	Sell	160,283 -4,760	-3%	-$478K	0.49%	41
2025 Q4	$16.9M	Buy	165,043 +4,970	+3%	+$445K	0.49%	39
2025 Q3	$10M	Buy	160,073 +38,513	+32%	+$2.1M	0.28%	64
2025 Q2	$6.33M	Buy	+121,560	New	+$5.43M	0.19%	101
2021 Q2	–	Sell	-13,898	Closed	-$2.12M	–	342
2021 Q1	$2.12M	Sell	13,898 -9,470	-41%	-$1.43M	0.08%	179
2020 Q4	$3.01M	Buy	+23,368	New	+$2.69M	0.11%	163
2019 Q4	–	Sell	-78,420	Closed	-$5.01M	–	368
2019 Q3	$5.01M	Sell	78,420 -80,779	-51%	-$7.12M	0.2%	148
2019 Q2	$13.7M	Buy	+159,199	New	+$12.2M	0.53%	43

Other funds holding GH

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Two Sigma Investments New York $138B AUM 41.87% 1-Year Est. Return

Capital International Investors Los Angeles, California $484B AUM 34.9% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return

Castleark Management's GH Position: Q2 2026 in Review

Castleark Management reduced its Guardant Health (GH) stake by 50% in Q2 2026, selling an estimated $8.7M and leaving 80,293 shares worth $12M. The position accounts for 0.32% of the portfolio, ranked #59.

Castleark Management first reported a position in GH in Q2 2019 and has held it in 9 quarters since. The position peaked at $16.9M in Q4 2025. 598 funds tracked by Wall St. Rank hold GH as of Q2 2026.

Castleark Management held 80,293 shares of Guardant Health worth $12M as of Q2 2026.
Castleark Management sold 79,990 Guardant Health shares in Q2 2026, an estimated $8.7M.
Guardant Health made up 0.32% of Castleark Management's portfolio in Q2 2026, its #59 holding.
Castleark Management first reported a position in Guardant Health in Q2 2019 and has held it in 9 quarters since.
Castleark Management's Guardant Health position peaked at $16.9M in Q4 2025.
598 funds tracked by Wall St. Rank held Guardant Health as of Q2 2026.

Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.