Spark Investment Management’s Puma Biotechnology PBYI Stock Holding History

Spark Investment Management’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 Q2	$138K	Buy	+17,000	New	+$124K	0.27%	46
2019 Q4	–	Sell	-144,624	Closed	-$1.56M	–	566
2019 Q3	$1.56M	Sell	144,624 -309,676	-68%	-$3.34M	0.2%	134
2019 Q2	$5.77M	Sell	454,300 -116,500	-20%	-$2.68M	0.4%	69
2019 Q1	$22.1M	Buy	570,800 +96,700	+20%	+$2.95M	1.02%	14
2018 Q4	$9.65M	Buy	474,100 +389,000	+457%	+$11.7M	0.67%	29
2018 Q3	$3.9M	Hold	85,100	–	–	0.22%	144
2018 Q2	$5.03M	Buy	+85,100	New	+$4.93M	0.3%	108
2018 Q1	–	Sell	-19,700	Closed	-$1.95M	–	692
2017 Q4	$1.95M	Buy	+19,700	New	+$2.2M	0.1%	270
2017 Q1	–	Sell	-118,700	Closed	-$3.64M	–	871
2016 Q4	$3.64M	Buy	+118,700	New	+$5.13M	0.3%	86

Other funds holding PBYI

ACA

Acorn Capital Advisors New York $366M AUM 474.6% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

LSV Asset Management Chicago, Illinois $55.1B AUM 45.38% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Spark Investment Management's PBYI Position: Q2 2026 in Review

Spark Investment Management opened a new position in Puma Biotechnology (PBYI) in Q2 2026: 17,000 shares worth $138K. The stake represents 0.27% of the portfolio and ranks #46 among its holdings. This is a return to the name: Spark Investment Management previously reported a position in PBYI as recently as Q3 2019.

Spark Investment Management first reported a position in PBYI in Q4 2016 and has held it in 9 quarters since. The position peaked at $22.1M in Q1 2019. 161 funds tracked by Wall St. Rank hold PBYI as of Q2 2026.

Spark Investment Management held 17,000 shares of Puma Biotechnology worth $138K as of Q2 2026.
Puma Biotechnology was a new Spark Investment Management position in Q2 2026.
Puma Biotechnology made up 0.27% of Spark Investment Management's portfolio in Q2 2026, its #46 holding.
Spark Investment Management first reported a position in Puma Biotechnology in Q4 2016 and has held it in 9 quarters since.
Spark Investment Management's Puma Biotechnology position peaked at $22.1M in Q1 2019.
161 funds tracked by Wall St. Rank held Puma Biotechnology as of Q2 2026.

Based on Spark Investment Management's 13F filing for Q2 2026, filed 10 Aug 2026.