Portolan Capital Management’s Applied Optoelectronics AAOI Stock Holding History

Portolan Capital Management’s Portfolio AAOI Stock Details AAOI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$2.52M	Sell	29,833 -198,625	-87%	-$12.7M	0.13%	120
2025 Q4	$7.96M	Sell	228,458 -317,761	-58%	-$9.49M	0.43%	81
2025 Q3	$14.2M	Buy	546,219 +90,897	+20%	+$2.32M	0.77%	43
2025 Q2	$11.7M	Buy	+455,322	New	+$7.37M	0.73%	45
2025 Q1	–	Sell	-336,907	Closed	-$12.4M	–	110
2024 Q4	$12.4M	Sell	336,907 -321,685	-49%	-$8.66M	0.84%	40
2024 Q3	$9.42M	Sell	658,592 -182,467	-22%	-$1.89M	0.68%	53
2024 Q2	$6.97M	Sell	841,059 -593,841	-41%	-$6.53M	0.57%	63
2024 Q1	$19.9M	Sell	1,434,900 -104,183	-7%	-$1.76M	1.51%	18
2023 Q4	$29.7M	Buy	1,539,083 +491,484	+47%	+$6.42M	2.6%	6
2023 Q3	$11.5M	Sell	1,047,599 -167,390	-14%	-$1.78M	1.07%	26
2023 Q2	$7.24M	Buy	+1,214,989	New	+$3.19M	0.64%	47
2017 Q4	–	Sell	-13,261	Closed	-$858K	–	117
2017 Q3	$858K	Sell	13,261 -25,228	-66%	-$1.78M	0.1%	106
2017 Q2	$2.38M	Sell	38,489 -21,120	-35%	-$1.23M	0.31%	89
2017 Q1	$3.35M	Sell	59,609 -4,985	-8%	-$197K	0.43%	85
2016 Q4	$1.51M	Sell	64,594 -61,102	-49%	-$1.42M	0.2%	110
2016 Q3	$2.79M	Sell	125,696 -228,784	-65%	-$3.54M	0.38%	77
2016 Q2	$3.95M	Sell	354,480 -187,199	-35%	-$2.12M	0.57%	67
2016 Q1	$8.08M	Buy	541,679 +104,920	+24%	+$1.67M	1.08%	29
2015 Q4	$7.5M	Buy	436,759 +273,670	+168%	+$4.97M	0.95%	30
2015 Q3	$3.06M	Buy	+163,089	New	+$3.18M	0.41%	87
2014 Q4	–	Sell	-307,350	Closed	-$4.95M	–	109
2014 Q3	$4.95M	Buy	307,350 +33,620	+12%	+$667K	1.12%	32
2014 Q2	$6.35M	Buy	273,730 +219,047	+401%	+$4.7M	1.39%	22
2014 Q1	$1.35M	Buy	+54,683	New	+$1.02M	0.31%	99

Other funds holding AAOI

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

OAM

Oberweis Asset Management Lisle, Illinois $3.39B AUM 105.5% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

D.E. Shaw & Co New York $166B AUM 43.98% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

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

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Portolan Capital Management's AAOI Position: Q1 2026 in Review

Portolan Capital Management reduced its Applied Optoelectronics (AAOI) stake by 87% in Q1 2026, selling an estimated $12.7M and leaving 29,833 shares worth $2.52M. The position accounts for 0.13% of the portfolio, ranked #120.

Portolan Capital Management first reported a position in AAOI in Q1 2014 and has held it in 23 quarters since. The position peaked at $29.7M in Q4 2023. 375 funds tracked by Wall St. Rank hold AAOI as of Q1 2026.

Portolan Capital Management held 29,833 shares of Applied Optoelectronics worth $2.52M as of Q1 2026.
Portolan Capital Management sold 198,625 Applied Optoelectronics shares in Q1 2026, an estimated $12.7M.
Applied Optoelectronics made up 0.13% of Portolan Capital Management's portfolio in Q1 2026, its #120 holding.
Portolan Capital Management first reported a position in Applied Optoelectronics in Q1 2014 and has held it in 23 quarters since.
Portolan Capital Management's Applied Optoelectronics position peaked at $29.7M in Q4 2023.
375 funds tracked by Wall St. Rank held Applied Optoelectronics as of Q1 2026.

Based on Portolan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.