Granahan Investment Management, LLC
Position in ADTN — ADTRAN Holdings, Inc.
CIK 1026710
WALTHAM, MA
Position in ADTN
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$622,136
+$234,899 QoQ
Shares Held
44,758
+45.4% QoQ
Ownership
0.055%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#126
of 248 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in ADTN Over Time
Shares Held
Position Value (USD)
Position in Communication Equipment
Technology · as of Jun 30, 2026Granahan Investment Management, LLC holds $7,041,520 across 3 Communication Equipment names. ADTN ranks #3 (8.8% of the industry book) .
All Filings in ADTN
Export CSV
6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $622,136 | 44,758 | Shares | Sole | 2026-08-14 | |
| 2026-03-31 | $387,237 | 30,782 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $476,559 | 54,840 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $5,463,756 | 582,490 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $1,796,870 | 200,320 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $314,730 | 36,093 | Shares | Sole | 2025-05-15 | |
| No filing history on record for this holder in this stock. | ||||||