Portolan Capital Management, LLC

Position in AAOI — Applied Optoelectronics, Inc.

CIK 1350290 BOSTON, MA

Position in AAOI

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$2,523,573

-$5,440,472 QoQ

Shares Held

29,833

-86.9% QoQ

Ownership

0.037%

of shares outstanding

% of Portfolio

0.14%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2023

11 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Technology · as of Mar 31, 2026

Portolan Capital Management, LLC holds $52,736,881 across 7 Communication Equipment names. AAOI ranks #7 (4.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NOK	Nokia Corp	2,393,970	$19,247,518
2	DGII	Digi International Inc	170,256	$8,206,339
3	CIEN	Ciena Corp	18,466	$7,169,055
4	FEIM	Frequency Electronics Inc	150,141	$6,645,240
5	VIAV	Viavi Solutions Inc.	145,844	$4,853,688
6	LITE	Lumentum Holdings Inc.	5,822	$4,091,468
7	AAOI	Applied Optoelectronics, Inc. This page	29,833	$2,523,573

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,523,573	29,833	-86.9%	Shares	Sole	2026-05-15
2025-12-31	$7,964,045	228,458	-58.2%	Shares	Sole	2026-02-17
2025-09-30	$14,163,458	546,219	+20.0%	Shares	Sole	2025-11-13
2025-06-30	$11,697,222	455,322	+35.1%	Shares	Sole	2025-08-13
2024-12-31	$12,418,392	336,907	-48.8%	Shares	Sole	2025-02-13
2024-09-30	$9,424,451	658,592	-21.7%	Shares	Sole	2024-11-14
2024-06-30	$6,972,379	841,059	-41.4%	Shares	Sole	2024-08-14
2024-03-31	$19,887,714	1,434,900	-6.8%	Shares	Sole	2024-05-15
2023-12-31	$29,735,083	1,539,083	+46.9%	Shares	Sole	2024-02-14
2023-09-30	$11,492,161	1,047,599	-13.8%	Shares	Sole	2023-11-14
2023-06-30	$7,241,334	1,214,989	—	Shares	Sole	2023-08-14
No filing history on record for this holder in this stock.