ADTRAN Holdings, Inc ADTN

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ADTRAN Holdings, Inc. - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 9.8500 · FX 1 USD = 1.288650 SGD · about SGD 12.6932 per unit

Sign in to place simulated trades. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 9.67 → 9.85 · 1.9%
19.40013.3257.250 1 2,3 4 5 6,7 8 9 10,11 12 13,14 15 16 17,18 19 20 21 22 23 Jul 25Oct 25Jan 26Apr 26Jul 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 26 Jul 2025 — 27 Jul 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

No data yet
Weekend
Weekend
10.1700 10.2200 9.7900 9.8500 2,001,500
23 · 8-K After-hours · 16:30 ET 8-K ↗
10.2300 10.6400 10.0900 10.1500 1,967,800
9.6300 10.4700 9.2600 10.4500 5,339,400
22 · 8-K Pre-market · 07:02 ET 8-K ↗
11.9500 12.1800 11.7600 12.1400 1,576,200
11.8200 11.9100 11.4600 11.6000 927,000
Weekend
Weekend
21 · S-3ASR After market open · 14:12 ET S-3ASR ↗
11.2900 11.9500 11.2400 11.6500 1,138,000
11.5000 11.8000 11.3800 11.7100 1,808,000
12.6000 12.8000 11.7300 11.8800 1,653,000
12.7400 12.9000 12.5000 12.6000 917,400
13.1500 13.4400 12.3400 12.4300 2,119,000
Weekend
Weekend
13.4400 13.5100 13.2000 13.4400 711,700
13.1700 13.6600 13.0200 13.5400 829,900
12.4800 13.0100 12.4500 12.8700 1,967,900
12.4800 12.8000 12.3000 12.5400 1,691,800
12.9100 13.3400 12.7900 12.8900 955,700
Weekend
Weekend
No trading
13.7200 13.7200 12.4200 12.7100 1,770,400
13.6000 14.1800 13.4400 13.6400 1,295,900
13.7300 14.0700 13.5100 13.9000 3,511,100
13.5100 13.8200 12.9200 13.7500 2,012,400
Weekend
Weekend
13.6800 13.8100 13.0700 13.5200 4,501,400
20 · 8-K Pre-market · 07:02 ET 8-K ↗
14.0800 14.2900 13.3200 14.0400 1,280,400
14.3000 14.7300 13.7000 13.9600 1,961,700
14.8100 15.1400 14.2800 14.4700 1,793,900
15.2300 15.8600 15.0400 15.5800 2,023,600
Weekend
Weekend
No trading
15.6900 15.8600 15.1000 15.1800 3,036,000
14.9000 15.6900 14.6100 15.0900 1,800,300
15.0000 15.2000 14.5500 14.7900 1,529,500
15.6300 15.7300 14.7300 15.1300 4,140,800
Weekend
Weekend
15.2300 15.5400 14.8600 15.2600 1,168,100
15.1200 15.2400 14.5700 15.2000 1,314,200
14.2600 15.0300 14.2600 14.9500 2,386,000
16.0200 16.1000 14.0000 14.2600 3,172,700
15.4700 17.0600 15.4300 16.0200 2,963,300
Weekend
Weekend
16.8600 16.8600 15.2300 15.3500 2,120,500
16.6400 17.3200 16.1000 17.2700 3,069,200
18.2600 18.3000 17.1800 17.5600 2,140,600
17.9700 18.8000 17.9700 18.2600 3,167,800
16.4500 17.9300 16.3800 17.8700 3,816,400
Weekend
Weekend
17.1600 17.1600 16.1600 16.5500 3,203,300
18.8600 19.0600 16.3200 16.9200 5,734,500
16.7900 19.9800 16.5900 19.4000 7,012,300
15.9700 16.5400 15.3400 16.4900 1,880,800
No trading
Weekend
Weekend
15.2400 15.8500 15.0600 15.6700 2,909,600
14.4300 14.9200 14.1000 14.8300 1,531,000
14.8000 15.0200 14.3900 14.4700 1,043,500
14.8000 14.9400 14.4800 14.5700 1,014,300
19 · 8-K After market open · 10:10 ET 8-K ↗
15.2600 15.4400 14.7900 14.9600 2,113,400
Weekend
Weekend
14.8300 15.0900 14.7100 14.9100 1,940,700
16.1400 16.1800 15.0600 15.2800 1,582,500
15.3400 16.2800 14.9800 15.7700 3,532,700
15.3200 15.4900 14.5600 15.0400 1,790,400
15.9100 16.1000 15.5600 15.6800 2,413,500
Weekend
Weekend
14.8100 15.2000 14.6600 14.9400 1,531,800
15.8900 15.8900 14.3500 14.5500 3,014,300
15.3000 15.8200 15.1100 15.7100 2,756,000
15.8700 16.0300 14.2800 15.3000 6,203,600
18 · 10-Q Pre-market · 09:08 ET 10-Q ↗ 17 · 8-K Pre-market · 07:00 ET 8-K ↗
18.4500 18.6300 17.9500 18.3400 5,867,900
Weekend
Weekend
16 · DEFA14A After market open · 13:50 ET DEFA14A ↗
17.7900 18.6900 17.6000 18.4500 3,417,900
17.0400 17.7400 16.8800 17.6900 2,876,100
16.1900 17.0200 16.1500 16.7900 3,774,500
16.4800 16.6100 15.8300 16.1600 2,047,000
16.7500 16.8300 16.3400 16.7400 2,642,700
Weekend
Weekend
17.0000 17.0700 16.5700 16.9300 2,433,200
16.9200 17.1800 16.4300 16.7400 1,754,300
17.5000 17.6900 16.7000 16.9500 2,793,600
17.6800 17.9900 17.4300 17.5000 2,389,500
16.9000 17.7900 16.8000 17.6300 2,703,800
Weekend
Weekend
16.9000 17.1700 16.3000 16.9600 3,689,000
15.8000 16.7300 15.6600 16.6700 3,010,900
15.2200 15.7400 14.9800 15.7300 2,179,000
15.3400 15.7000 14.9400 15.3000 3,410,800
15.0000 15.0700 14.5900 14.9700 2,025,800
Weekend
Weekend
15.0500 15.2500 14.8700 15.0900 2,437,600
13.9700 14.8500 13.8100 14.8200 3,740,600
13.5300 13.8400 13.2700 13.7300 2,546,700
15 · 8-K After-hours · 16:00 ET 8-K ↗
12.8800 13.2500 12.5300 13.2100 1,558,800
12.9800 13.1900 12.8900 12.9300 1,008,000
Weekend
Weekend
No trading
12.3100 12.9700 12.2800 12.8800 2,298,400
12.7900 13.0500 12.6500 12.7300 3,108,000
12.1900 12.7200 12.1100 12.5800 2,432,800
13.0000 13.0700 12.1600 12.1900 1,593,600
Weekend
Weekend
12.9700 13.1000 12.7400 12.9300 1,823,100
14 · DEFA14A Pre-market · 06:55 ET DEFA14A ↗ 13 · DEF 14A Pre-market · 06:54 ET DEF 14A ↗
12.5000 13.0500 12.4400 12.9700 3,475,600
12.7000 12.7600 12.3100 12.6400 1,911,200
11.9100 12.7400 11.8400 12.5300 2,381,100
11.6800 12.1800 11.4700 12.0700 1,711,000
Weekend
Weekend
11.9500 12.0000 11.3100 11.4600 1,735,000
11.4500 12.2900 11.1800 11.9000 3,511,700
10.7900 11.8000 10.7600 11.7100 2,672,300
10.3000 10.8000 10.3000 10.7900 1,496,300
10.1800 10.3300 10.0700 10.3300 1,392,700
Weekend
Weekend
12 · PRE 14A After-hours · 16:01 ET PRE 14A ↗
10.1500 10.2700 9.8800 9.9400 873,400
10.0600 10.2100 9.9500 10.0100 668,400
10.1000 10.2700 9.9800 10.2400 842,200
9.7600 10.2600 9.6500 10.1500 1,369,100
9.3700 9.6600 9.2500 9.6200 875,400
Weekend
Weekend
9.7500 9.8700 9.5800 9.5900 1,042,100
10.2100 10.3900 9.8400 10.0600 1,440,400
10.0600 10.4800 10.0600 10.2500 1,014,700
9.7100 10.0300 9.6600 9.8800 1,319,600
9.9000 10.1300 9.7500 9.9600 1,155,500
Weekend
Weekend
9.9100 10.2400 9.8000 10.2000 2,110,500
11.0000 11.1000 9.6700 9.9100 3,510,900
11 · 10-K Pre-market · 09:26 ET 10-K ↗ 10 · 8-K Pre-market · 07:00 ET 8-K ↗
10.5800 10.9500 10.5600 10.6900 1,636,100
10.2900 10.8400 10.1900 10.5800 2,182,100
10.0700 10.3000 9.8400 10.2200 1,144,400
Weekend
Weekend
9.9100 10.3500 9.8400 10.0700 1,012,700
9.9000 9.9700 9.7700 9.8800 1,616,800
10.1500 10.2800 9.8700 9.9600 1,062,300
9.9700 10.2800 9.8800 10.1500 1,260,200
No trading
Weekend
Weekend
10.0300 10.3100 9.8400 10.1300 1,001,800
10.3800 10.4000 9.6500 9.9400 824,600
10.5600 10.5600 10.1500 10.3800 1,257,600
10.3000 10.5900 10.2900 10.3500 1,146,900
9.9200 10.4600 9.6600 10.4000 1,209,600
Weekend
Weekend
9.5800 9.9700 9.3800 9.8600 1,202,000
9.3100 9.5700 9.1700 9.3900 1,144,500
9.5300 9.8100 9.1600 9.4700 1,061,700
9.5000 9.6400 9.2700 9.5000 1,131,900
9.2200 9.6700 9.2200 9.3700 947,700
Weekend
Weekend
9.3300 9.6700 9.2000 9.2200 1,415,700
9.5000 9.6500 9.3600 9.3700 1,501,600
9.7200 9.8500 9.5200 9.6000 864,800
9.8500 9.8500 9.5800 9.5800 1,246,400
9.5500 9.8000 9.4700 9.7300 1,005,300
Weekend
Weekend
9.8800 9.9300 9.4900 9.5500 1,712,800
9.8300 10.3500 9.7900 9.9000 2,469,400
9 · 8-K Next filing day · accepted 21 Jan, 19:34 ET 8-K ↗
9.3400 9.3800 9.1300 9.2900 858,700
8.9300 9.3500 8.9200 9.2400 757,900
No trading
Weekend
Weekend
9.1200 9.3000 9.0000 9.2500 1,078,100
8.9000 9.3600 8.8100 9.0900 1,569,900
8.9500 9.0400 8.7200 8.7600 881,700
9.3800 9.3800 8.9500 9.0000 937,700
8.7800 9.3700 8.7600 9.3600 1,807,800
Weekend
Weekend
8.7700 8.8400 8.5000 8.8100 708,100
8.7800 8.8400 8.6300 8.8300 1,020,500
9.0600 9.0800 8.7300 8.8300 908,200
8.7300 9.2500 8.6100 9.1400 1,092,700
8.7300 8.9000 8.6500 8.7600 847,400
Weekend
Weekend
8.8200 8.8400 8.5700 8.6800 475,600
No trading
8.8500 8.8700 8.6800 8.6900 720,600
8.7200 8.9000 8.5900 8.8500 3,364,300
8.7000 8.8000 8.6100 8.6800 444,400
Weekend
Weekend
8.8000 8.8300 8.7200 8.7500 329,000
No trading
8.9600 8.9600 8.7100 8.8100 339,200
8.9700 9.1000 8.8600 8.9800 851,500
8.7300 9.1500 8.7300 9.0300 1,073,300
Weekend
Weekend
8.5800 8.7800 8.5800 8.6900 1,379,600
8.6000 8.8400 8.5000 8.5800 1,042,100
8.6500 8.8800 8.3800 8.4500 1,107,700
8.3000 8.6400 8.2700 8.5900 1,403,100
8.4000 8.4600 8.2300 8.3700 762,200
Weekend
Weekend
8.6400 8.6400 8.2500 8.3100 1,082,800
8 · 8-K After-hours · 16:05 ET 8-K ↗
8.8100 8.9000 8.4800 8.6800 1,732,900
8.7900 8.8900 8.5500 8.8600 1,027,100
8.4700 8.8500 8.4600 8.7900 903,800
8.6700 8.7500 8.4700 8.5400 1,065,300
Weekend
Weekend
8.4300 8.5500 8.3700 8.5300 862,900
8.2300 8.6000 8.2300 8.5400 3,512,100
8.1500 8.3300 8.1200 8.2300 1,051,700
8.0400 8.3600 7.9900 8.1300 2,395,600
7.8800 8.2200 7.7500 7.9100 2,005,400
Weekend
Weekend
8.0200 8.0500 7.8900 7.9300 561,100
No trading
7.7500 8.1000 7.7000 7.9800 1,600,300
7.3700 7.8500 7.3000 7.7000 2,353,100
7.3000 7.4400 7.3000 7.3500 922,400
Weekend
Weekend
7.3700 7.4800 7.2400 7.2500 1,589,400
7.7300 7.7700 7.3400 7.4000 1,319,900
7.2900 7.5100 7.2800 7.4700 1,167,800
7.2500 7.3500 7.1100 7.2500 889,100
7.4100 7.5200 7.2500 7.3300 1,239,600
Weekend
Weekend
7.4600 7.6100 7.3800 7.4700 996,000
8.0500 8.0500 7.5500 7.6700 1,318,400
8.0700 8.3200 7.9900 8.0400 2,697,300
8.0000 8.0900 7.8300 8.0300 896,400
8.2000 8.2600 7.9000 8.0200 1,255,200
Weekend
Weekend
8.1100 8.1100 7.7100 7.9700 2,104,200
8.3500 8.4200 8.0100 8.0300 2,442,100
8.0500 8.4600 7.9100 8.4000 4,307,800
7 · 10-Q After market open · 13:28 ET 10-Q ↗
9.1200 9.1400 7.8800 7.9100 6,678,600
6 · 8-K Pre-market · 07:00 ET 8-K ↗
10.4300 10.5700 10.2600 10.4300 2,111,800
Weekend
Weekend
10.5900 10.7500 10.2500 10.4200 2,082,200
10.0200 10.5900 10.0200 10.5400 1,686,900
10.2700 10.3800 9.9600 10.1500 1,600,200
9.9400 10.3300 9.8800 10.2900 1,378,500
10.1700 10.2500 9.9200 9.9700 2,352,600
Weekend
Weekend
9.8800 10.1700 9.8000 10.0700 2,021,100
9.1800 9.7700 9.1700 9.7600 2,565,700
9.3300 9.5400 9.1300 9.2100 1,621,700
9.1200 9.3900 9.0400 9.3300 1,536,200
9.1600 9.3100 9.1000 9.1800 920,200
Weekend
Weekend
9.3000 9.4100 9.0300 9.0400 933,900
9.2600 9.5400 9.2400 9.4100 980,000
8.9500 9.3000 8.9100 9.2500 1,900,500
8.4600 8.9000 8.4000 8.7900 883,000
8.8400 8.8900 8.5700 8.6200 1,160,800
Weekend
Weekend
8.9600 9.0600 8.4900 8.6100 1,177,700
9.0300 9.0700 8.8400 8.9800 1,040,400
8.9200 9.1500 8.8800 9.0900 1,305,900
9.1600 9.2100 8.8200 8.8500 2,295,300
9.3600 9.3900 9.1800 9.1900 1,078,900
Weekend
Weekend
9.4000 9.6000 9.2400 9.2500 1,070,100
9.6400 9.6400 9.2900 9.2900 1,135,100
9.2900 9.6600 9.1700 9.5400 1,565,300
9.2500 9.4600 9.2000 9.3800 1,507,000
9.3600 9.3600 9.2000 9.2300 1,139,500
Weekend
Weekend
9.3600 9.4400 9.2200 9.2800 866,300
9.2400 9.4100 9.1800 9.3700 1,205,200
9.5300 9.5300 9.3400 9.4300 3,548,300
9.7000 9.7900 9.3900 9.5600 1,677,700
5 · 8-K After-hours · 16:05 ET 8-K ↗
9.4600 9.7000 9.3500 9.6500 1,780,200
Weekend
Weekend
9.6200 9.7000 9.3800 9.5000 2,733,100
9.0000 9.6400 8.9500 9.5800 5,360,500
8.7600 8.9500 8.6100 8.7700 10,814,400
4 · 8-K Pre-market · 07:15 ET 8-K ↗
9.4000 9.8100 8.7000 8.8600 10,102,700
10.0400 10.4800 9.7500 10.4400 1,185,900
Weekend
Weekend
10.3600 10.5000 10.0700 10.1100 694,700
10.3000 10.6400 10.2600 10.6100 661,900
10.5000 10.5000 10.1100 10.3400 812,600
10.1000 10.4600 10.0100 10.3700 1,083,600
9.8100 10.3200 9.7100 10.2000 1,196,400
Weekend
Weekend
9.7900 9.9000 9.6100 9.7500 643,000
9.3600 9.9200 9.3200 9.6700 1,356,600
9.4500 9.4700 9.1300 9.2800 742,400
9.1400 9.4500 9.0600 9.3900 556,900
No trading
Weekend
Weekend
9.4300 9.4900 9.3100 9.3800 1,258,800
9.3700 9.4800 9.3100 9.4500 689,200
9.3100 9.4400 9.2500 9.3400 523,900
9.1600 9.3900 9.0400 9.2800 725,400
9.1600 9.3000 9.0900 9.1200 593,500
Weekend
Weekend
8.7200 9.1800 8.7200 9.1700 630,500
8.3300 8.7700 8.3300 8.7000 705,400
8.5600 8.5800 8.2700 8.4000 839,800
8.8100 8.9300 8.5500 8.5900 478,600
8.8200 8.9000 8.7900 8.8300 530,900
Weekend
Weekend
8.9700 8.9700 8.8000 8.8400 602,100
9.0700 9.1000 8.7400 8.9400 814,800
9.2000 9.3500 9.0800 9.3200 803,400
8.6600 9.2000 8.6600 9.1000 1,109,700
8.5700 8.6500 8.4200 8.5600 876,700
Weekend
Weekend
8.7500 8.7700 8.5800 8.5900 777,500
8.7100 8.7500 8.4900 8.7100 841,700
8.1100 8.7400 8.1100 8.6600 1,768,200
3 · 10-Q After market open · 11:14 ET 10-Q ↗
9.1400 9.2200 7.9500 8.0900 4,135,100
2 · 8-K Pre-market · 07:30 ET 8-K ↗
8.8100 9.4900 8.8100 9.4700 1,058,100
Weekend
Weekend
9.1000 9.1100 8.6200 8.7600 1,319,100
9.2900 9.5800 9.2200 9.2900 1,049,100
1 · 8-K After-hours · 16:06 ET 8-K ↗
9.5100 9.6300 9.1300 9.1900 603,200
9.7000 9.8100 9.4900 9.5100 784,800
9.2500 9.6900 9.2100 9.6700 1,045,300
Weekend
Weekend

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

23 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:30 ET Summarise
22 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:02 ET Summarise
21 S-3ASR S-3ASR (opens SEC filing in a new tab) After market open · 14:12 ET Summarise
20 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:02 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After market open · 10:10 ET Summarise
18 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 09:08 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:00 ET Summarise
16 DEFA14A DEFA14A (opens SEC filing in a new tab) After market open · 13:50 ET Summarise
15 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:00 ET Summarise
14 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 06:55 ET Summarise
13 DEF 14A DEF 14A (opens SEC filing in a new tab) Pre-market · 06:54 ET Summarise
12 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
11 10-K 10-K (opens SEC filing in a new tab) Pre-market · 09:26 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:00 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) Next filing day · accepted 21 Jan, 19:34 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
7 10-Q 10-Q (opens SEC filing in a new tab) After market open · 13:28 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:00 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:15 ET Summarise
3 10-Q 10-Q (opens SEC filing in a new tab) After market open · 11:14 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:30 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise