CASTLEARK MANAGEMENT LLC
13F filer · CIK 1106832 · Chicago, IL
Summary
CASTLEARK MANAGEMENT LLC reported $3.71B across 309 positions in its 13F for 2026 Q2, filed Aug 14, 2026. The largest holdings are NVDA (7.0%), GOOGL (4.9%), AAPL (3.7%). Versus 2026 Q1, leaving options aside, it opened 59 new positions, added to 71, trimmed 88 and sold out of 42.
Reported value$3.71B
Positions309
Report period2026 Q2
FiledAug 14, 2026
New positions59
Added71
Trimmed88
Sold out42
Top 25 holdings
By reported value, options listed separately · change vs 2026 Q1
Weight 7.0%Value $260.04MPrice $227.21Shares 1.30M +3.31%Since Jun 30 +13.55%
Weight 4.9%Value $181.22MPrice $340.92Shares 507K +21.31%Since Jun 30 -4.60%
Weight 3.7%Value $136.61MPrice $329.40Shares 472K +34.88%Since Jun 30 +13.84%
Weight 3.3%Value $122.98MPrice $323.86Shares 284K -15.72%Since Jun 30 -25.26%
Weight 2.9%Value $109.21MPrice $508.96Shares 293K +10.85%Since Jun 30 +36.44%
Weight 2.8%Value $105.19MPrice $1185Shares 88K +19.35%Since Jun 30 -1.23%
Weight 2.5%Value $92.13MPrice $355.10Shares 244K +20.32%Since Jun 30 -6.00%
Weight 2.4%Value $89.95MPrice $32.30Shares 2.69MSince Jun 30 -3.47%
Weight 2.2%Value $81.03MPrice $365.88Shares 236K +53.53%Since Jun 30 +6.64%
Weight 2.2%Value $80.41MPrice $202.86Shares 473K +9.84%Since Jun 30 +19.41%
Weight 2.0%Value $75.85MPrice $21.89Shares 3.33MSince Jun 30 -3.93%
Weight 1.9%Value $69.64MPrice $44.45Shares 1.49MSince Jun 30 -5.04%
Weight 1.9%Value $69.05MPrice $607.57Shares 119K +33.63%Since Jun 30 +4.59%
Weight 1.8%Value $66.65MPrice $151.28Shares 528K +54.18%Since Jun 30 +19.74%
Weight 1.7%Value $63.93MPrice $246.67Shares 268K +9.11%Since Jun 30 +3.50%
Weight 1.5%Value $54.16MPrice $962.49Shares 46K +11.12%Since Jun 30 -18.08%
Weight 1.4%Value $52.81MPrice $738.79Shares 94K -24.38%Since Jun 30 +31.16%
Weight 1.3%Value $48.03MPrice $398.22Shares 121K +55.23%Since Jun 30 +0.26%
Weight 1.3%Value $46.97MPrice $563.58Shares 91K -0.60%Since Jun 30 +9.73%
Weight 1.2%Value $43.59MPrice $192.76Shares 209K +780.67%Since Jun 30 -7.79%
Weight 1.1%Value $42.46MPrice $330.31Shares 167K +22.62%Since Jun 30 +29.79%
Weight 1.1%Value $41.48MPrice $248.34Shares 124K +10.27%Since Jun 30 -25.83%
Weight 1.0%Value $38.90MPrice $114.12Shares 266K +29.97%Since Jun 30 -22.04%
Weight 1.0%Value $38.70MPrice $28.67Shares 1.33MSince Jun 30 -1.17%
Weight 0.9%Value $33.74MPrice $68.75Shares 448KSince Jun 30 -8.64%
| Stock | Weight | Value | Since Jun 30 | Shares change | Action |
|---|---|---|---|---|---|
| 7.0% | $260.04M | +13.55% | +3.31% | Add | |
| 4.9% | $181.22M | -4.60% | +21.31% | Add | |
| 3.7% | $136.61M | +13.84% | +34.88% | Add | |
| 3.3% | $122.98M | -25.26% | -15.72% | Trim | |
| 2.9% | $109.21M | +36.44% | +10.85% | Add | |
| 2.8% | $105.19M | -1.23% | +19.35% | Add | |
| 2.5% | $92.13M | -6.00% | +20.32% | Add | |
| 2.4% | $89.95M | -3.47% | — | Hold | |
| 2.2% | $81.03M | +6.64% | +53.53% | Add | |
| 2.2% | $80.41M | +19.41% | +9.84% | Add | |
| 2.0% | $75.85M | -3.93% | — | Hold | |
| 1.9% | $69.64M | -5.04% | — | Hold | |
| 1.9% | $69.05M | +4.59% | +33.63% | Add | |
| 1.8% | $66.65M | +19.74% | +54.18% | Add | |
| 1.7% | $63.93M | +3.50% | +9.11% | Add | |
| 1.5% | $54.16M | -18.08% | +11.12% | Add | |
| 1.4% | $52.81M | +31.16% | -24.38% | Trim | |
| 1.3% | $48.03M | +0.26% | +55.23% | Add | |
| 1.3% | $46.97M | +9.73% | -0.60% | Trim | |
| 1.2% | $43.59M | -7.79% | +780.67% | Add | |
| 1.1% | $42.46M | +29.79% | +22.62% | Add | |
| 1.1% | $41.48M | -25.83% | +10.27% | Add | |
| 1.0% | $38.90M | -22.04% | +29.97% | Add | |
| 1.0% | $38.70M | -1.17% | — | Hold | |
| 0.9% | $33.74M | -8.64% | — | Hold |
Weight is the share of the reported 13F value, including options at notional value. “Since Jun 30” compares the latest close with the quarter-end price implied by the filing (value ÷ shares).
Largest buys in 2026 Q2
Largest sells in 2026 Q2
Source: SEC Form 13F, values as reported by the filer. Filings lag up to 45 days after quarter end and cover only certain long positions. Research only, not investment advice.