State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Puma Biotechnology PBYI Stock Holding History

State of Wisconsin Investment Board’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 		$1.33M Buy
208,618
+74,844
+56% +$483K ﹤0.01% 1564
2025
Q4 		$796K Buy
133,774
+79,456
+146% +$422K ﹤0.01% 1760
2025
Q3 		$288K Buy
+54,318
New +$230K ﹤0.01% 2131
2021
Q2 		– Sell
-49,900
Closed -$485K – 2137
2021
Q1 		$485K Sell
49,900
-19,600
-28% -$219K ﹤0.01% 1611
2020
Q4 		$713K Sell
69,500
-10,300
-13% -$104K ﹤0.01% 1424
2020
Q3 		$805K Buy
79,800
+23,900
+43% +$243K ﹤0.01% 1344
2020
Q2 		$583K Sell
55,900
-3,500
-6% -$36.2K ﹤0.01% 1379
2020
Q1 		$501K Buy
59,400
+13,200
+29% +$128K ﹤0.01% 1349
2019
Q4 		$404K Hold
46,200
– – ﹤0.01% 1493
2019
Q3 		$497K Buy
46,200
+4,400
+11% +$47.5K ﹤0.01% 1328
2019
Q2 		$531K Buy
41,800
+900
+2% +$20.7K ﹤0.01% 1307
2019
Q1 		$1.59M Buy
40,900
+10,800
+36% +$330K ﹤0.01% 1046
2018
Q4 		$613K Buy
30,100
+400
+1% +$12K ﹤0.01% 1263
2018
Q3 		$1.36M Hold
29,700
– – ﹤0.01% 1114
2018
Q2 		$1.76M Buy
29,700
+1,100
+4% +$63.7K 0.01% 1013
2018
Q1 		$1.95M Hold
28,600
– – 0.01% 976
2017
Q4 		$2.83M Buy
28,600
+6,600
+30% +$739K 0.01% 938
2017
Q3 		$2.63M Hold
22,000
– – 0.01% 940
2017
Q2 		$1.92M Buy
+22,000
New +$1.23M 0.01% 957
2016
Q2 		– Sell
-17,440
Closed -$512K – 1334
2016
Q1 		$512K Sell
17,440
-720
-4% -$32.5K ﹤0.01% 1267
2015
Q4 		$1.42M Sell
18,160
-510
-3% -$40K 0.01% 1170
2015
Q3 		$1.41M Sell
18,670
-530
-3% -$50.1K 0.01% 1198
2015
Q2 		$2.24M Buy
+19,200
New +$3.48M 0.01% 1156

Other funds holding PBYI

ACA
Acorn Capital Advisors New York $352M AUM 299.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 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 $481B AUM 30.42% 1-Year Est. Return
LSV Asset Management
LSV Asset Management Chicago, Illinois $46.4B AUM 27.74% 1-Year Est. Return

State of Wisconsin Investment Board's PBYI Position: Q1 2026 in Review

State of Wisconsin Investment Board increased its Puma Biotechnology (PBYI) stake by 56% in Q1 2026, buying an estimated $483K and bringing the position to 208,618 shares worth $1.33M. The position accounts for ﹤0.01% of the portfolio, ranked #1564.

State of Wisconsin Investment Board first reported a position in PBYI in Q2 2015 and has held it in 23 quarters since. The position peaked at $2.83M in Q4 2017. 157 funds tracked by Wall St. Rank hold PBYI as of Q1 2026.

  • State of Wisconsin Investment Board held 208,618 shares of Puma Biotechnology worth $1.33M as of Q1 2026.
  • State of Wisconsin Investment Board bought 74,844 Puma Biotechnology shares in Q1 2026, an estimated $483K.
  • Puma Biotechnology made up ﹤0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1564 holding.
  • State of Wisconsin Investment Board first reported a position in Puma Biotechnology in Q2 2015 and has held it in 23 quarters since.
  • State of Wisconsin Investment Board's Puma Biotechnology position peaked at $2.83M in Q4 2017.
  • 157 funds tracked by Wall St. Rank held Puma Biotechnology as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.