Jim Simons
PBYI icon

Jim Simons’s Puma Biotechnology PBYI Stock Holding History

Jim Simons’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
2026
Q1 		$12.4M Sell
1,942,413
-181,400
-9% -$1.17M 0.02% 858
2025
Q4 		$12.6M Sell
2,123,813
-27,400
-1% -$146K 0.02% 804
2025
Q3 		$11.4M Buy
2,151,213
+276,500
+15% +$1.17M 0.02% 1027
2025
Q2 		$6.43M Buy
1,874,713
+45,500
+2% +$145K 0.01% 1355
2025
Q1 		$5.41M Buy
1,829,213
+73,700
+4% +$231K 0.01% 1387
2024
Q4 		$5.35M Sell
1,755,513
-16,900
-1% -$49.2K 0.01% 1413
2024
Q3 		$4.52M Buy
1,772,413
+19,400
+1% +$58.7K 0.01% 1509
2024
Q2 		$5.71M Buy
1,753,013
+23,600
+1% +$104K 0.01% 1214
2024
Q1 		$9.17M Buy
1,729,413
+56,200
+3% +$303K 0.01% 1038
2023
Q4 		$7.25M Sell
1,673,213
-53,389
-3% -$177K 0.01% 1110
2023
Q3 		$4.54M Sell
1,726,602
-31,411
-2% -$107K 0.01% 1364
2023
Q2 		$6.21M Sell
1,758,013
-76,900
-4% -$240K 0.01% 1299
2023
Q1 		$5.67M Buy
1,834,913
+136,070
+8% +$513K 0.01% 1400
2022
Q4 		$7.19M Sell
1,698,843
-100,819
-6% -$348K 0.01% 1277
2022
Q3 		$4.26M Sell
1,799,662
-177,273
-9% -$518K 0.01% 1533
2022
Q2 		$5.63M Buy
1,976,935
+205,700
+12% +$511K 0.01% 1471
2022
Q1 		$5.1M Sell
1,771,235
-49,623
-3% -$128K 0.01% 1579
2021
Q4 		$5.54M Buy
1,820,858
+188,923
+12% +$820K 0.01% 1468
2021
Q3 		$11.4M Buy
1,631,935
+33,600
+2% +$252K 0.01% 945
2021
Q2 		$14.7M Buy
1,598,335
+6,100
+0.4% +$61.8K 0.02% 938
2021
Q1 		$15.5M Sell
1,592,235
-69,200
-4% -$773K 0.02% 923
2020
Q4 		$17M Buy
1,661,435
+109,738
+7% +$1.11M 0.02% 837
2020
Q3 		$15.7M Buy
1,551,697
+86,000
+6% +$876K 0.02% 864
2020
Q2 		$15.3M Buy
1,465,697
+377,100
+35% +$3.9M 0.01% 976
2020
Q1 		$9.19M Buy
1,088,597
+991,097
+1,017% +$9.63M 0.01% 1217
2019
Q4 		$853K Buy
+97,500
New +$807K ﹤0.01% 2700
2019
Q3 		– Sell
-252,200
Closed -$3.21M – 3634
2019
Q2 		$3.21M Buy
252,200
+160,300
+174% +$3.69M ﹤0.01% 2081
2019
Q1 		$3.56M Sell
91,900
-185,700
-67% -$5.67M ﹤0.01% 2014
2018
Q4 		$5.65M Buy
+277,600
New +$8.33M 0.01% 1640
2017
Q4 		– Sell
-134,600
Closed -$16.1M – 3472
2017
Q3 		$16.1M Buy
+134,600
New +$12.5M 0.02% 1021
2017
Q2 		– Sell
-206,500
Closed -$7.68M – 3326
2017
Q1 		$7.68M Buy
+206,500
New +$7.53M 0.01% 1422
2015
Q4 		– Sell
-162,600
Closed -$12.3M – 3391
2015
Q3 		$12.3M Buy
+162,600
New +$15.4M 0.03% 806
2014
Q4 		– Sell
-30,200
Closed -$7.21M – 3076
2014
Q3 		$7.21M Buy
+30,200
New +$6.2M 0.02% 968
2014
Q2 		– Sell
-12,600
Closed -$1.31M – 2919
2014
Q1 		$1.31M Buy
+12,600
New +$1.48M ﹤0.01% 1959

Other funds holding PBYI

ACA
Acorn Capital Advisors New York $352M AUM 299.18% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return
OSAM
O'Shaughnessy Asset Management Stamford, Connecticut $20.1B AUM 30.42% 1-Year Est. Return

Jim Simons's PBYI Position: Q1 2026 in Review

Jim Simons reduced its Puma Biotechnology (PBYI) stake by 8.5% in Q1 2026, selling an estimated $1.17M and leaving 1,942,413 shares worth $12.4M. The position accounts for 0.02% of the portfolio, ranked #858.

Jim Simons first reported a position in PBYI in Q1 2014 and has held it in 34 quarters since. The position peaked at $17M in Q4 2020. 157 funds tracked by Wall St. Rank hold PBYI as of Q1 2026.

  • Jim Simons held 1,942,413 shares of Puma Biotechnology worth $12.4M as of Q1 2026.
  • Jim Simons sold 181,400 Puma Biotechnology shares in Q1 2026, an estimated $1.17M.
  • Puma Biotechnology made up 0.02% of Jim Simons's portfolio in Q1 2026, its #858 holding.
  • Jim Simons first reported a position in Puma Biotechnology in Q1 2014 and has held it in 34 quarters since.
  • Jim Simons's Puma Biotechnology position peaked at $17M in Q4 2020.
  • 157 funds tracked by Wall St. Rank held Puma Biotechnology as of Q1 2026.

Based on Renaissance Technologies's 13F filing for Q1 2026, filed 14 May 2026.