Westfield Capital Management
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Westfield Capital Management’s Prothena Corp PRTA Stock Holding History

Westfield Capital Management’s Portfolio PRTA Stock Details PRTA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2018
Q2 		– Sell
-309,819
Closed -$11.4M – 269
2018
Q1 		$11.4M Sell
309,819
-370,840
-54% -$13.5M 0.09% 198
2017
Q4 		$25.5M Buy
680,659
+57,170
+9% +$2.91M 0.19% 169
2017
Q3 		$40.4M Sell
623,489
-60,671
-9% -$3.72M 0.31% 116
2017
Q2 		$37M Buy
684,160
+444,966
+186% +$23.7M 0.32% 114
2017
Q1 		$13.3M Sell
239,194
-89,081
-27% -$4.68M 0.11% 200
2016
Q4 		$16.1M Buy
328,275
+51,125
+18% +$2.82M 0.14% 195
2016
Q3 		$16.6M Buy
277,150
+39,270
+17% +$2.11M 0.13% 186
2016
Q2 		$8.32M Buy
237,880
+192,050
+419% +$8.36M 0.07% 202
2016
Q1 		$1.89M Hold
45,830
– – 0.01% 224
2015
Q4 		$3.12M Sell
45,830
-942,149
-95% -$56.8M 0.02% 231
2015
Q3 		$44.8M Sell
987,979
-404,871
-29% -$23.6M 0.32% 105
2015
Q2 		$73.4M Sell
1,392,850
-342,078
-20% -$13.5M 0.45% 78
2015
Q1 		$66.2M Buy
1,734,928
+656,378
+61% +$16.8M 0.38% 91
2014
Q4 		$22.4M Sell
1,078,550
-79,845
-7% -$1.67M 0.13% 195
2014
Q3 		$25.7M Buy
1,158,395
+96,575
+9% +$2.05M 0.16% 171
2014
Q2 		$23.9M Buy
1,061,820
+548,890
+107% +$13.7M 0.14% 186
2014
Q1 		$19.6M Sell
512,930
-426,850
-45% -$13.8M 0.12% 211
2013
Q4 		$24.9M Buy
+939,780
New +$23.6M 0.15% 185

Other funds holding PRTA

WIM
Woodford Investment Management London, United Kingdom $310M AUM 17.41% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
SCM
Scopia Capital Management New York $146M AUM 25.93% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
PAI
Palo Alto Investors Palo Alto, California $654M AUM 77.8% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Westfield Capital Management's PRTA Position: Q2 2018 in Review

Westfield Capital Management sold out of Prothena Corp (PRTA) in Q2 2018, closing a stake of 309,819 shares — an estimated $11.4M sold.

Westfield Capital Management first reported a position in PRTA in Q4 2013 and held it in 18 quarters. The position peaked at $73.4M in Q2 2015. 125 funds tracked by Wall St. Rank hold PRTA as of Q2 2018.

  • Westfield Capital Management reported no remaining Prothena Corp position as of Q2 2018 after selling out during the quarter.
  • Westfield Capital Management sold 309,819 Prothena Corp shares in Q2 2018, an estimated $11.4M.
  • Westfield Capital Management first reported a position in Prothena Corp in Q4 2013 and held it in 18 quarters.
  • Westfield Capital Management's Prothena Corp position peaked at $73.4M in Q2 2015.
  • 125 funds tracked by Wall St. Rank held Prothena Corp as of Q2 2018.

Based on Westfield Capital Management's 13F filing for Q2 2018, filed 13 Aug 2018.