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Jane Street’s Puma Biotechnology PBYI Stock Holding History

Jane Street’s Portfolio PBYI Stock Details PBYI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2021
Q1 		– Sell
-35,100
Closed -$360K – 9459
2020
Q4 		$360K Buy
35,100
+17,900
+104% +$181K ﹤0.01% 6159
2020
Q3 		$174K Buy
+17,200
New +$175K ﹤0.01% 6514
2018
Q3 		– Sell
-7,300
Closed -$432K – 5550
2018
Q2 		$432K Buy
+7,300
New +$423K ﹤0.01% 3742
2017
Q4 		– Sell
-4,000
Closed -$479K – 5028
2017
Q3 		$479K Sell
4,000
-25,700
-87% -$2.39M ﹤0.01% 3146
2017
Q2 		$2.6M Buy
+29,700
New +$1.66M 0.01% 1258
2016
Q4 		– Sell
-5,800
Closed -$389K – 4461
2016
Q3 		$389K Buy
+5,800
New +$293K ﹤0.01% 3032

Other funds holding PBYI

ACA
Acorn Capital Advisors New York $366M AUM 474.6% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
LSV Asset Management
LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Jane Street's PBYI Position: Q1 2026 in Review

Jane Street sold out of Puma Biotechnology (PBYI) in Q1 2026, closing a stake of 36,362 shares — an estimated $234K sold.

Jane Street first reported a position in PBYI in Q1 2014 and held it in 30 quarters. The position peaked at $2.89M in Q2 2015. 157 funds tracked by Wall St. Rank hold PBYI as of Q1 2026.

  • Jane Street reported no remaining Puma Biotechnology position as of Q1 2026 after selling out during the quarter.
  • Jane Street sold 36,362 Puma Biotechnology shares in Q1 2026, an estimated $234K.
  • Jane Street first reported a position in Puma Biotechnology in Q1 2014 and held it in 30 quarters.
  • Jane Street's Puma Biotechnology position peaked at $2.89M in Q2 2015.
  • 157 funds tracked by Wall St. Rank held Puma Biotechnology as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.