Nierenberg Investment Management Company, LLC
Position in ADTN — ADTRAN Holdings, Inc.
CIK 1282683
Camas, WA
Position in ADTN
as of Mar 31, 2026
· filed May 13, 2026
Position Value
$1,171,323
+$362,198 QoQ
Shares Held
93,110
0.0% QoQ
Ownership
0.115%
of shares outstanding
% of Portfolio
0.80%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
7 quarters on record
Voting authority
Sole 0.ToString("F0")%
Shared 100.ToString("F0")%
None 0.ToString("F0")%
Common Shares in ADTN Over Time
Shares Held
Position Value (USD)
Derivatives in ADTN
reported options exposure · as of Dec 31, 2024CallValue
$1,666,000
CallShares
200,000
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Communication Equipment
Technology · as of Mar 31, 2026Nierenberg Investment Management Company, LLC holds $1,608,342 across 2 Communication Equipment names. ADTN ranks #1 (72.8% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | ADTN |
ADTRAN Holdings, Inc.
This page
|
93,110 | $1,171,323 | |
| 2 | CLFD |
Clearfield, Inc.
|
16,510 | $437,019 |
All Filings in ADTN
Export CSV
9 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,171,323 | 93,110 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $809,125 | 93,110 | Shares | Sole | 2026-02-13 | |
| 2025-09-30 | $3,218,371 | 343,110 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $3,077,696 | 343,110 | Shares | Sole | 2025-08-11 | |
| 2025-03-31 | $3,794,159 | 435,110 | Shares | Sole | 2025-05-13 | |
| 2024-12-31 | $2,858,106 | 343,110 | Shares | Sole | 2025-02-13 | |
| 2024-12-31 | $1,666,000 | 200,000 | Call | Sole | 2025-02-13 | |
| 2024-09-30 | $1,186,000 | 200,000 | Call | Sole | 2024-11-13 | |
| 2024-09-30 | $2,034,642 | 343,110 | Shares | Sole | 2024-11-13 | |
| No filing history on record for this holder in this stock. | ||||||