CM
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Castleark Management’s Jazz Pharmaceuticals JAZZ Stock Holding History

Castleark Management’s Portfolio JAZZ Stock Details JAZZ Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$11.3M Sell
46,920
-1,820
-4% -$399K 0.3% 68
2026
Q1 		$9.21M Buy
+48,740
New +$8.52M 0.3% 67
2018
Q4 		– Sell
-44,055
Closed -$7.41M – 386
2018
Q3 		$7.41M Buy
44,055
+260
+0.6% +$44.7K 0.21% 155
2018
Q2 		$7.55M Buy
43,795
+10,595
+32% +$1.73M 0.23% 137
2018
Q1 		$5.01M Buy
+33,200
New +$4.87M 0.16% 183
2015
Q3 		– Sell
-26,225
Closed -$4.62M – 386
2015
Q2 		$4.62M Sell
26,225
-30,825
-54% -$5.54M 0.12% 195
2015
Q1 		$9.86M Buy
57,050
+36,175
+173% +$6.21M 0.24% 135
2014
Q4 		$3.42M Sell
20,875
-19,681
-49% -$3.27M 0.09% 192
2014
Q3 		$5.62M Buy
+40,556
New +$6.24M 0.16% 146
2014
Q2 		– Sell
-40,556
Closed -$5.62M – 327
2014
Q1 		$5.62M Sell
40,556
-29,901
-42% -$4.5M 0.16% 146
2013
Q4 		$8.92M Buy
70,457
+67,157
+2,035% +$6.95M 0.26% 61
2013
Q3 		$530K Sell
3,300
-32,405
-91% -$2.61M 0.01% 283
2013
Q2 		$2.45M Buy
+35,705
New +$2.18M 0.08% 175

Other funds holding JAZZ

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management San Mateo, California $36.7B AUM 74.15% 1-Year Est. Return

Castleark Management's JAZZ Position: Q2 2026 in Review

Castleark Management reduced its Jazz Pharmaceuticals (JAZZ) stake by 3.7% in Q2 2026, selling an estimated $399K and leaving 46,920 shares worth $11.3M. The position accounts for 0.3% of the portfolio, ranked #68.

Castleark Management first reported a position in JAZZ in Q2 2013 and has held it in 13 quarters since. 646 funds tracked by Wall St. Rank hold JAZZ as of Q2 2026.

  • Castleark Management held 46,920 shares of Jazz Pharmaceuticals worth $11.3M as of Q2 2026.
  • Castleark Management sold 1,820 Jazz Pharmaceuticals shares in Q2 2026, an estimated $399K.
  • Jazz Pharmaceuticals made up 0.3% of Castleark Management's portfolio in Q2 2026, its #68 holding.
  • Castleark Management first reported a position in Jazz Pharmaceuticals in Q2 2013 and has held it in 13 quarters since.
  • 646 funds tracked by Wall St. Rank held Jazz Pharmaceuticals as of Q2 2026.

Based on Castleark Management's 13F filing for Q2 2026, filed 14 Aug 2026.