Boston Partners

SEC CIK: 0001386060
Latest filing: Aug 4, 2026

SEC filings (opens in a new tab)

ADTN holding history

ADTRAN Holdings, Inc. in every 13F filed by Boston Partners, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

ADTN overview All 13F holders of ADTN Full Q2 2026 holdings

Shares (Q2 2026): 1,651,038
Value: $22.7M
% of portfolio: <0.1%
Quarters held: 2; Since Q1 2026

Holdings of ADTN by Boston Partners, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	1,651,038	$22.7M	<0.1%	+469,724+39.8%	Added	Holders
Q1 2026	1,181,314	$14.9M	<0.1%	+1,181,314	New	Holders