DOSSIER · 13F-HR · Q2 2026

CASTLEARK MANAGEMENT LLC

$3.7B in tracked AUM across 309 positions as of Q2 2026.

CM
CIK 0001106832 · last filed Jun 30, 2026
Total AUM
$3.7B
as of Q2 2026
Holdings
309
positions
Whale Score
59
59
tracked
Activity
no data
changes this Q
AI Analysis · Q2 2026

Comprehensive Analysis of CastleArk Management LLC SEC 13F Filing (Q3 2025)

1. Portfolio Overview

CastleArk Management LLC reported a significant contraction in portfolio value for the quarter ending September 30, 2025. The total assets under management (AUM) decreased by 33.8%, dropping from $3.33 billion to $2.20 billion. This reduction was driven by a combination of active portfolio deleveraging and substantial exits from major positions rather than market depreciation alone, as evid...

2. Key Holdings

The portfolio is characterized by a high-conviction top tier, with the top three positions accounting for approximately 30.6% of the total value.

  • Advisors Inner Circle Fund II (AII): This remains the largest holding at $322.06 million (14.62% of the portfolio). While this position was reduced by 12.6% during the quarter, its continued dominance suggests a strategic core allocation, likely serving as a liquidity vehicle or a managed fund overlay within the portfolio.
  • NVIDIA Corporation (NVDA): As the second-largest holding ($257.02M, 11.67%), NVDA is the primary direct equity anchor. Despite a reduction of 2.9% (approx. $32.8M), CastleArk retains a massive stake, indicating sustained confidence in the AI infrastructure theme.
  • Communication Services Leaders: Meta Platforms (META) and Alphabet (GOOGL) occupy the 3rd and 4th spots, respectively. Both positions saw minor reductions (~3.5%), suggesting a trimming of winners rather than a loss of conviction in the digital advertising space.
  • Fixed Income ETFs: A notable feature of the top 10 is the allocation to bond ETFs, specifically SPIB, VMBS, and GOVT, which collectively hold roughly 11% of the portfolio. This signals a defensive posture or a desire to generate yield/risk-off exposure outside of the volatile equity markets.

3. Sector Allocation

The sector breakdown reveals a distinct pivot in the fund's strategy.

  • Technology Dominance: The Technology sector remains the largest equity allocation at $540.10M (24.5% of total portfolio). This is heavily skewed toward semiconductors (NVDA, AVGO) and software (NOW, SHOP).
  • Communication Services: This sector represents a significant overweight at $265.00M (12.0%), driven almost entirely by META, GOOGL, and NFLX.
  • Defensive and "Unknown" Shifts: A substantial portion of the portfolio is categorized as "Unknown" ($423.54M) and "ETF" ($322.60M). The "Unknown" classification typically includes foreign issuers or complex vehicles (like the Advisors Inner Circle Fund), while the ETF allocation points to a move toward systematic exposure (fixed income and retail via XRT).
  • Emerging Cyclicals: New capital has flowed into Utilities ($38.87M) and Financial Services ($191.98M), specifically targeting power generation (CEG, VST) and asset management/credit (BX), reflecting a bet on the energy demands of AI and financial normalization.
Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Quarter at a glance — Q2 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q2 2026.

#HoldingValueSharesWeight
01
NVDA
NVIDIA CORPORATION
$260M1.3M7.0%
02
GOOGL
ALPHABET INC
$181M507K4.9%
03
AAPL
APPLE INC
$137M472K3.7%
04
LRCX
LAM RESEARCH CORP
$123M284K3.3%
05
MSFT
MICROSOFT CORP
$109M293K2.9%
06
LLY
ELI LILLY & CO
$105M88K2.8%
07
AVGO
BROADCOM INC
$92M244K2.5%
08
SPIB
SPDR SERIES TRUST
$90M2.7M2.4%
09
V
VISA INC
$81M236K2.2%
10
ANET
ARISTA NETWORKS INC
$80M473K2.2%

Filing history

2026Q2Jun 30
$3.7B 22.7%
309 positionsView →
2026Q1Mar 31
$3.0B 11.3%
292 positionsView →
2025Q4Dec 31
$3.4B 54.6%
294 positionsView →
2025Q3Sep 30
$2.2B 33.8%
141 positionsView →
2025Q2Jun 30
$3.3B 15.3%
275 positionsLocked
2025Q1Mar 31
$2.9B 0.6%
280 positionsLocked
2024Q4Dec 31
$2.9B 16.9%
283 positionsLocked
2024Q3Sep 30
$2.5B 0.2%
272 positionsLocked
2024Q2Jun 30
$2.4B 1.8%
271 positionsLocked
2024Q1Mar 31
$2.4B 6.5%
278 positionsLocked
2023Q4Dec 31
$2.3B 15.0%
281 positionsLocked
2023Q3Sep 30
$2.0B 11.1%
274 positionsLocked
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