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Castleark Management’s Lam Research LRCX Stock Holding History

Castleark Management’s Portfolio LRCX Stock Details LRCX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$71.9M Sell
336,740
-36,136
-10% -$8.08M 2.38% 7
2025
Q4 		$63.8M Sell
372,876
-131,244
-26% -$20.4M 1.87% 12
2025
Q3 		$67.5M Sell
504,120
-18,530
-4% -$1.96M 1.89% 12
2025
Q2 		$50.9M Buy
522,650
+295,712
+130% +$23.5M 1.53% 17
2025
Q1 		$16.5M Buy
226,938
+105,658
+87% +$8.32M 0.57% 31
2024
Q4 		$8.76M Sell
121,280
-438,510
-78% -$33.3M 0.31% 54
2024
Q3 		$45.7M Sell
559,790
-8,230
-1% -$716K 1.86% 13
2024
Q2 		$60.5M Buy
568,020
+26,000
+5% +$2.49M 2.47% 8
2024
Q1 		$52.7M Buy
542,020
+14,100
+3% +$1.24M 2.19% 11
2023
Q4 		$41.3M Sell
527,920
-7,030
-1% -$479K 1.83% 14
2023
Q3 		$33.5M Sell
534,950
-51,100
-9% -$3.36M 1.71% 17
2023
Q2 		$37.7M Buy
586,050
+1,300
+0.2% +$73.3K 1.71% 15
2023
Q1 		$31M Sell
584,750
-9,150
-2% -$449K 1.52% 20
2022
Q4 		$25M Sell
593,900
-203,000
-25% -$8.49M 1.3% 20
2022
Q3 		$29.2M Sell
796,900
-174,700
-18% -$7.78M 1.62% 19
2022
Q2 		$41.4M Buy
971,600
+46,300
+5% +$2.2M 2.22% 13
2022
Q1 		$49.7M Sell
925,300
-49,300
-5% -$2.87M 2.15% 11
2021
Q4 		$70.1M Sell
974,600
-2,100
-0.2% -$132K 2.58% 6
2021
Q3 		$55.6M Sell
976,700
-132,450
-12% -$8.06M 2.13% 9
2021
Q2 		$72.2M Sell
1,109,150
-79,500
-7% -$5.02M 2.42% 6
2021
Q1 		$70.8M Sell
1,188,650
-38,650
-3% -$2.11M 2.55% 4
2020
Q4 		$58M Buy
1,227,300
+207,300
+20% +$8.72M 2.17% 6
2020
Q3 		$33.8M Buy
1,020,000
+106,900
+12% +$3.68M 1.33% 17
2020
Q2 		$29.5M Buy
913,100
+135,200
+17% +$3.69M 1.28% 18
2020
Q1 		$18.7M Buy
777,900
+757,500
+3,713% +$21.8M 1.11% 24
2019
Q4 		$596K Buy
20,400
+9,200
+82% +$244K 0.02% 270
2019
Q3 		$259K Buy
+11,200
New +$235K 0.01% 315
2018
Q3 		– Sell
-5,800
Closed -$100K – 393
2018
Q2 		$100K Hold
5,800
– – ﹤0.01% 358
2018
Q1 		$118K Buy
+5,800
New +$115K ﹤0.01% 390

Other funds holding LRCX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Ameriprise
Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Castleark Management's LRCX Position: Q1 2026 in Review

Castleark Management reduced its Lam Research (LRCX) stake by 9.7% in Q1 2026, selling an estimated $8.08M and leaving 336,740 shares worth $71.9M. The position accounts for 2.38% of the portfolio, ranked #7.

Castleark Management first reported a position in LRCX in Q1 2018 and has held it in 29 quarters since. The position peaked at $72.2M in Q2 2021. 2,631 funds tracked by Wall St. Rank hold LRCX as of Q1 2026.

  • Castleark Management held 336,740 shares of Lam Research worth $71.9M as of Q1 2026.
  • Castleark Management sold 36,136 Lam Research shares in Q1 2026, an estimated $8.08M.
  • Lam Research made up 2.38% of Castleark Management's portfolio in Q1 2026, its #7 holding.
  • Castleark Management first reported a position in Lam Research in Q1 2018 and has held it in 29 quarters since.
  • Castleark Management's Lam Research position peaked at $72.2M in Q2 2021.
  • 2,631 funds tracked by Wall St. Rank held Lam Research as of Q1 2026.

Based on Castleark Management's 13F filing for Q1 2026, filed 15 May 2026.