SEI Investments

SEI Investments’s Adtran ADTN Stock Holding History

SEI Investments’s Portfolio ADTN Stock Details ADTN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$13.9M	Buy	1,105,110 +683,262	+162%	+$6.92M	0.01%	957
2025 Q4	$3.67M	Buy	+421,848	New	+$3.66M	﹤0.01%	1532
2023 Q2	–	Sell	-26,847	Closed	-$426K	–	2667
2023 Q1	$426K	Sell	26,847 -93,822	-78%	-$1.63M	﹤0.01%	2192
2022 Q4	$2.27M	Buy	120,669 +49,190	+69%	+$988K	0.01%	1435
2022 Q3	$1.4M	Buy	+71,479	New	+$1.56M	﹤0.01%	1685
2019 Q4	–	Sell	-14,832	Closed	-$168K	–	2379
2019 Q3	$168K	Hold	14,832	–	–	﹤0.01%	2266
2019 Q2	$226K	Buy	+14,832	New	+$237K	﹤0.01%	2203
2018 Q2	–	Sell	-14	Closed	–	–	3600
2018 Q1	$0	Buy	+14	New	+$234	﹤0.01%	3441
2017 Q3	–	Sell	-2	Closed	–	–	3186
2017 Q2	$0	Buy	+2	New	+$40	﹤0.01%	3046
2015 Q2	–	Sell	-48,808	Closed	-$911K	–	2257
2015 Q1	$911K	Hold	48,808	–	–	0.01%	998
2014 Q4	$1.06M	Buy	+48,808	New	+$1M	0.01%	921

Other funds holding ADTN

BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Royce & Associates New York $10.1B AUM 42.88% 1-Year Est. Return

DnB Asset Management

DnB Asset Management Oslo, Norway $28B AUM 26% 1-Year Est. Return

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

William Blair Investment Management

William Blair Investment Management Chicago, Illinois $30.3B AUM 33.75% 1-Year Est. Return

Millennium Management

Millennium Management New York $134B AUM 35.51% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Geode Capital Management

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