Osterweis Capital Management’s GSK GSK Stock Holding History

Osterweis Capital Management’s Portfolio GSK Stock Details GSK Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Hold	0	–	–	–	283
2018 Q4	–	Sell	-4,000	Closed	-$201K	–	106
2018 Q3	$201K	Hold	4,000	–	–	0.01%	111
2018 Q2	$202K	Buy	+4,000	New	+$201K	0.01%	106
2017 Q4	–	Sell	-416,032	Closed	-$21.1M	–	107
2017 Q3	$21.1M	Sell	416,032 -123,509	-23%	-$6.27M	1.58%	34
2017 Q2	$29.1M	Sell	539,541 -24,812	-4%	-$1.32M	2.21%	18
2017 Q1	$29.7M	Sell	564,353 -335,217	-37%	-$17M	2.33%	16
2016 Q4	$43.3M	Sell	899,570 -229,359	-20%	-$11.3M	3.12%	9
2016 Q3	$60.9M	Sell	1,128,929 -109,324	-9%	-$5.99M	3.66%	7
2016 Q2	$67.1M	Sell	1,238,253 -320,879	-21%	-$16.9M	4.28%	8
2016 Q1	$79M	Buy	1,559,132 +830,484	+114%	+$41.4M	4.59%	8
2015 Q4	$36.8M	Sell	728,648 -352,568	-33%	-$18M	3.38%	15
2015 Q3	$52M	Buy	1,081,216 +513,072	+90%	+$26.7M	2.35%	23
2015 Q2	$29.6M	Buy	+568,144	New	+$32M	1.03%	39

Other funds holding GSK

Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Fisher Asset Management Camas, Washington $295B AUM 31.6% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

JEST

JTC Employer Solutions Trustee St Helier, Jersey $1.25B AUM 41.83% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Royal Bank of Canada Toronto, Ontario, Canada $570B AUM 27.57% 1-Year Est. Return

Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Osterweis Capital Management's GSK Position: Q4 2025 in Review

Osterweis Capital Management held its GSK (GSK) position steady in Q4 2025 at 0 shares worth $11.9K. The position accounts for ﹤0.01% of the portfolio, ranked #283.

Osterweis Capital Management first reported a position in GSK in Q2 2015 and has held it in 12 quarters since. The position peaked at $79M in Q1 2016. 996 funds tracked by Wall St. Rank hold GSK as of Q4 2025.

Osterweis Capital Management held 0 shares of GSK worth $11.9K as of Q4 2025.
Osterweis Capital Management left its GSK share count unchanged in Q4 2025.
GSK made up ﹤0.01% of Osterweis Capital Management's portfolio in Q4 2025, its #283 holding.
Osterweis Capital Management first reported a position in GSK in Q2 2015 and has held it in 12 quarters since.
Osterweis Capital Management's GSK position peaked at $79M in Q1 2016.
996 funds tracked by Wall St. Rank held GSK as of Q4 2025.

Based on Osterweis Capital Management's 13F filing for Q4 2025, filed 17 Feb 2026.