CASTLEARK MANAGEMENT LLC

Q2 2026 13F-HR Holdings

Location
Chicago, IL
Holdings as of
6/30/2026
Date filed
8/14/2026
Form type
13F-HR
Num holdings
309
Total value ($000)
$3,709,338
Net value change ($000)
+687,156 (22.7%)
New positions
59
Sold out positions
42
Turnover %
14.5%
Sector allocation + QoQ delta (equities-only)
Prev filing: 5/15/2026 Next filing: — SEC filing

Snapshot: Change Analysis

Compared to Q1 2026
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
GOOGL 61,014 50.8%
LRCX 51,035 70.9%
AMD 50,954 281.6%
AAPL 47,780 53.8%
NVDA 40,641 18.5%
MS 39,697 1018.7%
LLY 37,603 55.6%
V 34,534 74.3%
AVGO 29,393 46.8%
ANET 27,497 52.0%
Top Reduces (Value $000, Stocks/ETFs)
SCHW -46,507 -98.2%
SHOP -26,890 -73.0%
ULTA -26,464 -100.0%
CVX -26,288 -93.0%
META -18,119 -25.5%
ASND -15,466 -100.0%
FANG -12,744 -44.4%
NXT -11,685 -85.0%
VIAV -11,643 -92.4%
RRC -10,913 -58.8%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type