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Castleark Management’s Bruker BRKR Stock Holding History

Castleark Management’s Portfolio BRKR Stock Details BRKR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$8.08M Buy
+134,270
New +$6.27M 0.22% 117
2020
Q1 		– Sell
-5,690
Closed -$290K – 341
2019
Q4 		$290K Sell
5,690
-2,680
-32% -$128K 0.01% 303
2019
Q3 		$368K Buy
8,370
+2,530
+43% +$113K 0.02% 307
2019
Q2 		$292K Buy
+5,840
New +$246K 0.01% 317
2016
Q2 		– Sell
-378,555
Closed -$10.6M – 376
2016
Q1 		$10.6M Buy
+378,555
New +$9.44M 0.33% 76

Other funds holding BRKR

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
OAG
Orbis Allan Gray Hamilton, Bermuda $29.1B AUM 60.8% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PCA
Pallas Capital Advisors Braintree, Massachusetts $3.25B AUM 40.07% 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
SC
Sculptor Capital New York $12.3B AUM 40.26% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Franklin Resources
Franklin Resources San Mateo, California $462B AUM 39.16% 1-Year Est. Return
SHCM
Sachem Head Capital Management New York $4.82B AUM 73.38% 1-Year Est. Return

Castleark Management's BRKR Position: Q2 2026 in Review

Castleark Management opened a new position in Bruker (BRKR) in Q2 2026: 134,270 shares worth $8.08M. The stake represents 0.22% of the portfolio and ranks #117 among its holdings. This is a return to the name: Castleark Management previously reported a position in BRKR as recently as Q4 2019.

Castleark Management first reported a position in BRKR in Q1 2016 and has held it in 5 quarters since. The position peaked at $10.6M in Q1 2016. 417 funds tracked by Wall St. Rank hold BRKR as of Q2 2026.

  • Castleark Management held 134,270 shares of Bruker worth $8.08M as of Q2 2026.
  • Bruker was a new Castleark Management position in Q2 2026.
  • Bruker made up 0.22% of Castleark Management's portfolio in Q2 2026, its #117 holding.
  • Castleark Management first reported a position in Bruker in Q1 2016 and has held it in 5 quarters since.
  • Castleark Management's Bruker position peaked at $10.6M in Q1 2016.
  • 417 funds tracked by Wall St. Rank held Bruker as of Q2 2026.

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