Adtran
ADTN
228 hedge funds and large institutions have $989M invested in Adtran in 2026 Q1 according to their latest regulatory filings, with 50 funds opening new positions, 88 increasing their positions, 63 reducing their positions, and 31 closing their positions.
150% more funds holding in top 10
Funds holding in top 10: 2 → 5 (+3)
89% more call options, than puts
Call options by funds: $1.78M | Put options by funds: $943K
62% more capital invested
Capital invested by funds: $612M → $989M (+$378M)
61% more first-time investments, than exits
New positions opened: 50 | Existing positions closed: 31
40% more repeat investments, than reductions
Existing positions increased: 88 | Existing positions reduced: 63
9.72% more ownership
Funds ownership: 87.81% → 97.53% (+9.7%)
7% more funds holding
Funds holding: 213 → 228 (+15)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SRFM
Shannon River Fund Management
New York
|
+$12.4M |
| 2 |
Boston Partners
Boston,
Massachusetts
|
+$12M |
| 3 |
JP Morgan Chase
New York
|
+$11M |
| 4 |
Two Sigma Investments
New York
|
+$10.7M |
| 5 |
Marshall Wace
London,
United Kingdom
|
+$9.04M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DCM
Divisar Capital Management
San Francisco,
California
|
-$12.3M |
| 2 |
OAM
Ophir Asset Management
Sydney,
Australia
|
-$9.29M |
| 3 |
Millennium Management
New York
|
-$8.09M |
| 4 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
-$6.8M |
| 5 |
William Blair Investment Management
Chicago,
Illinois
|
-$4.96M |
ADTN Hedge Fund Activity: Q1 2026 in Review
228 of the 8,186 institutional investors tracked by Wall St. Rank reported a position in Adtran (ADTN) for Q1 2026, worth a combined $989M — up 62% from $612M a quarter earlier.
Buyers outnumbered sellers: 50 funds opened new ADTN positions and 31 closed out — a net gain of 19 holders — while 88 added to existing stakes and 63 trimmed.
The largest buyer was Shannon River Fund Management, opening a new position worth an estimated $12.4M. The largest seller was Divisar Capital Management, cutting an estimated $12.3M.
- 228 institutional investors held Adtran (ADTN) as of Q1 2026, up from 213 in Q4 2025.
- Funds reported $989M of Adtran stock for Q1 2026, up 62% quarter-over-quarter.
- 50 funds opened new Adtran positions in Q1 2026 and 31 closed out, a net change of +19 holders.
- The largest Adtran buyer in Q1 2026 was Shannon River Fund Management, an estimated $12.4M added.
- The largest Adtran seller in Q1 2026 was Divisar Capital Management, an estimated $12.3M sold.
Based on aggregated 13F filings for Q1 2026.