ADTRAN Holdings
ADTN · NASDAQ
$6.58+$0.15 (+2.33%)TodayMarket closed ·
Prev close $6.43
Who owns ADTN
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 33.7% of ADTN’s shares.
- BlackRock Institutional Trust Company, N.A.9.1%
- The Vanguard Group, Inc.6.7%
- Dimensional Fund Advisors, L.P.2.8%
- Fuller & Thaler Asset Management Inc.2.6%
- Next 6 largest institutions12.5%
- All other shareholders66.3%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 7.34M | 9.06% |
| The Vanguard Group, Inc. | 5.42M | 6.70% |
| Dimensional Fund Advisors, L.P. | 2.27M | 2.80% |
| Fuller & Thaler Asset Management Inc. | 2.14M | 2.64% |
| Westwood Management Corp. (Texas) | 2.10M | 2.60% |
| Victory Capital Management Inc. | 1.93M | 2.38% |
| Mellon Investments Corporation | 1.62M | 2.00% |
| Bernzott Capital Advisors | 1.61M | 1.98% |
| State Street Global Advisors (US) | 1.57M | 1.94% |
| Renaissance Technologies LLC | 1.31M | 1.62% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 3.49M | 4.31% |
| Undiscovered Managers Behavioral Value Fund | 1.60M | 1.98% |
| Vanguard Total Stock Market Index Fund | 1.36M | 1.68% |
| Vanguard Small-Cap Index Fund | 1.19M | 1.47% |
| iShares Russell 2000 ETF | 1.13M | 1.40% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $50.00K (1 trade) and sold $2.36M (4 trades) of ADTN on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Glingener Christoph | Award | 27.92K | — |
| Santo Timothy P | Buy | 6.58K | $50.00K |
| Glingener Christoph | Award | 9.38K | — |
| DelSanto Anne | Award | 4.40K | — |
| Wilson James Denson Jr | Gift | 10.47K | — |
| Wilson James Denson Jr | Sale | 9.33K | $137.37K |
| Glingener Christoph | Option exercise | 22.28K | — |
| Glingener Christoph | Sale | 22.28K | $334.15K |
| Glingener Christoph | Option exercise | 22.28K | $271.11K |
| Glingener Christoph | Option exercise | 84.89K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 11.86M
- Days to cover
- 7.20
- % of shares outstanding
- 14.65%
- Average daily volume
- 1.65M
- Change since last report
- −5.4%
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