Parkman Healthcare Partners LLC

CIK

1777015

City

STAMFORD

State / Country

CT

Stock

CSTL — Castle Biosciences Inc

Top Portfolio Positions

89 positions · $964,562,654 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio	Open
SYK	Stryker Corp Healthcare	154,771	$50,856,202	5.27%
DXCM	Dexcom Inc Healthcare	689,822	$43,320,821	4.49%
KALV	KalVista Pharmaceuticals, Inc. Healthcare	1,835,506	$36,948,735	3.83%
PODD	Insulet Corp Healthcare	156,561	$32,852,760	3.41%
LLY	ELI LILLY & Co Healthcare	34,616	$31,838,758	3.30%
PTCT	Ptc Therapeutics, Inc. Healthcare	431,364	$29,388,829	3.05%
XENE	Xenon Pharmaceuticals Inc. Healthcare	497,035	$28,902,585	3.00%
BSX	Boston Scientific Corp Healthcare	448,768	$28,160,192	2.92%
CVS	CVS HEALTH Corp Healthcare	387,306	$27,816,316	2.88%
RCUS	Arcus Biosciences, Inc. Healthcare	1,207,274	$26,077,118	2.70%

Portfolio Trend

25 quarters · across all stocks

Holdings in CSTL

Compact Export CSV

Shares Held

Position Value (USD)

15 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$3,096,982	126,150	-16.2%	Shares	Sole	2026-05-15
2025-12-31	$5,856,706	150,558	-68.3%	Shares	Sole	2026-02-17
2025-09-30	$10,828,683	475,568	+35.0%	Shares	Sole	2025-11-14
2025-06-30	$7,193,190	352,262	+0.5%	Shares	Sole	2025-08-14
2025-03-31	$7,018,031	350,551	+15.1%	Shares	Sole	2025-05-15
2024-12-31	$8,118,362	304,629	+2.9%	Shares	Sole	2025-02-14
2024-09-30	$8,443,944	296,071	+6.5%	Shares	Sole	2024-11-14
2024-06-30	$6,049,774	277,895	-24.4%	Shares	Sole	2024-08-14
2024-03-31	$8,138,087	367,408	+2.9%	Shares	Sole	2024-05-15
2023-12-31	$7,707,426	357,156	+59.0%	Shares	Sole	2024-02-14
2023-09-30	$3,793,358	224,592	+51.7%	Shares	Sole	2023-11-14
2023-06-30	$2,030,587	148,002	+548.3%	Shares	Sole	2023-08-11
2020-12-31	$1,533,101	22,831	-23.9%	Shares	Sole	2021-02-12
2020-09-30	$1,543,654	30,003	+20.0%	Shares	Sole	2020-11-13
2020-06-30	$942,250	25,000	—	Shares	Sole	2020-08-13
No 13F history on record for this holder in this stock.