Sionna Therapeutics, Inc SION

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Sionna Therapeutics, Inc. - Common Stock · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 3.6000 · FX 1 USD = 1.277900 SGD · about SGD 4.6004 per unit

Sign in to practise with simulated trades before investing real money. 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 39.21 → 3.60 · -90.8%
51.04027.3203.600 1,2 3,4,5 6,7 8,9 10 11,12 13 14 Oct 25Jan 26Apr 26Jul 26Oct 26

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

Price & SEC Filing History 24 Oct 2025 — 25 Oct 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.

Weekend
Weekend
3.7500 3.8160 3.5500 3.6000 917,193
3.8700 3.9700 3.6410 3.8000 1,592,200
4.2000 4.3100 3.8600 3.8700 1,557,100
4.0600 4.3000 4.0200 4.1500 1,069,800
3.9300 4.1100 3.8400 4.0100 1,166,200
Weekend
Weekend
4.0600 4.0600 3.7750 3.8900 1,484,500
4.1500 4.3000 4.0200 4.0800 944,600
4.3000 4.4000 3.9300 4.0900 1,497,900
4.6900 4.7950 4.3650 4.3800 790,400
4.8900 4.9300 4.6750 4.6900 692,500
Weekend
Weekend
4.9300 5.1200 4.8300 4.9000 633,600
4.7800 4.9700 4.6500 4.9000 915,600
4.6800 4.8700 4.6100 4.8200 880,100
4.8800 4.8800 4.5200 4.7500 1,259,900
4.9500 4.9600 4.6300 4.8500 1,097,000
Weekend
Weekend
5.1900 5.1900 4.8600 4.9100 1,159,300
5.2600 5.3300 5.0300 5.1000 1,056,700
5.1900 5.3420 5.0200 5.2600 1,157,500
5.1500 5.1900 5.0250 5.1500 797,500
5.1700 5.2500 5.0500 5.1200 775,600
Weekend
Weekend
5.2800 5.3000 5.0900 5.2300 1,401,500
5.5000 5.5900 5.1520 5.2300 1,246,700
6.0300 6.1200 5.3200 5.5100 1,668,800
5.9900 6.1700 5.8400 6.0200 1,693,900
6.0000 6.1300 5.7000 6.0000 2,522,700
Weekend
Weekend
7.1200 7.1900 5.9000 5.9600 3,704,800
7.2700 7.7300 7.1500 7.1800 1,476,800
6.9500 7.3680 6.9100 7.0400 1,970,800
7.8700 8.0000 6.8500 6.8800 2,461,800
14 · 8-K After-hours · 16:10 ET 8-K ↗
7.8400 8.5350 7.8400 8.2600 1,210,600
Weekend
Weekend
7.7900 8.0300 7.4700 7.8500 1,208,100
7.4000 7.7500 7.1200 7.6200 1,222,600
7.2700 7.5500 7.1690 7.4800 766,100
7.1300 7.5550 6.8900 7.3000 884,700
No trading
Weekend
Weekend
6.6800 7.2200 6.6200 7.1800 921,800
7.3100 7.5600 6.7000 6.7500 1,242,200
6.6300 7.3500 6.2700 7.3100 1,590,500
5.9500 6.4800 5.9300 6.4600 1,404,800
5.8700 6.0800 5.7500 6.0300 1,382,300
Weekend
Weekend
5.9700 6.0600 5.8220 5.8700 783,100
6.1400 6.2500 5.9700 6.0600 773,900
6.2000 6.2900 6.0200 6.1700 923,800
5.6000 6.3000 5.5800 6.2500 1,973,200
5.2900 5.6100 5.2100 5.5900 1,773,800
Weekend
Weekend
5.5400 5.7200 5.2700 5.2900 1,937,800
6.2700 6.2730 5.5100 5.5200 1,749,500
6.0900 6.2800 5.8800 6.2500 1,873,700
5.7500 5.9800 5.6000 5.9400 2,057,600
6.4700 6.8000 5.8200 5.9100 2,985,500
Weekend
Weekend
6.2400 6.6600 6.1500 6.4600 2,877,400
6.2900 6.7500 6.0500 6.5400 5,485,900
4.9900 6.4000 4.9750 6.2500 9,438,000
4.5100 5.4900 4.4900 5.1000 14,931,100
4.8500 5.0000 4.0100 4.5000 38,644,400
13 · 8-K Pre-market · 07:15 ET 8-K ↗
Weekend
Weekend
50.8600 54.9700 49.3000 51.0400 747,500
47.1100 50.8000 47.0800 49.6100 778,300
12 · 10-Q Pre-market · 07:19 ET 10-Q ↗ 11 · 8-K Pre-market · 07:12 ET 8-K ↗
50.2000 51.9100 46.9150 47.3400 757,700
50.1600 51.7300 48.5200 49.9400 913,100
46.8600 49.4900 45.5700 49.2600 509,000
Weekend
Weekend
46.6800 47.6200 44.2700 47.1300 392,300
44.6900 47.2800 44.6400 46.7800 353,200
46.8100 46.8400 44.6300 44.8100 368,300
45.4100 46.6900 44.1100 46.5500 320,200
46.0300 47.8900 45.1050 45.3800 403,800
Weekend
Weekend
44.3100 46.3950 43.4100 45.7000 654,800
44.3900 46.4500 43.8400 44.0600 811,100
46.9200 47.7100 44.2300 45.0300 562,900
45.2400 48.0000 45.2400 47.2100 598,100
50.2000 51.5650 44.7800 45.6900 816,400
Weekend
Weekend
44.7200 51.0000 43.1200 49.4100 1,139,300
44.1700 48.2200 43.4720 45.2900 1,096,300
42.3300 45.3700 41.6850 44.3800 522,000
44.2400 45.0100 42.3900 42.5900 276,000
45.4000 45.4900 42.7300 43.9500 415,300
Weekend
Weekend
44.9000 45.4100 42.2400 45.2900 371,000
44.0000 45.9100 43.6450 44.9400 755,200
44.4800 46.9800 43.2900 44.0000 573,800
43.6700 46.6400 43.0000 44.9300 664,400
44.0100 44.3800 42.3900 43.1200 255,800
Weekend
Weekend
No trading
42.0500 44.1800 41.1600 43.9900 328,700
43.6300 44.2800 40.9200 41.6400 438,300
43.3300 45.0000 42.4000 43.9900 682,800
42.2900 43.4800 41.7180 42.9700 320,000
Weekend
Weekend
42.5600 44.0300 40.6900 42.1800 1,019,100
41.0900 44.3000 40.4400 42.7700 475,600
39.8100 41.2800 39.1800 41.0900 546,700
38.4000 42.3100 37.2800 39.8700 540,400
37.8900 40.0150 37.8700 38.8300 416,400
Weekend
Weekend
No trading
10 · 8-K After-hours · 16:05 ET 8-K ↗
38.2800 38.5550 36.6300 37.3000 736,800
34.8100 37.1100 33.9850 36.7300 406,700
36.0100 36.2050 34.4250 34.7500 375,100
36.5400 37.8200 35.5300 36.0000 278,600
Weekend
Weekend
36.0500 37.1700 35.5000 35.9200 189,600
34.2000 36.8400 33.7200 36.0500 399,000
33.4400 35.2900 32.8350 34.0300 316,900
34.3700 35.2600 32.3300 33.6900 320,200
35.2900 35.4400 32.2600 33.5100 423,800
Weekend
Weekend
37.5500 37.9500 35.2500 35.3700 461,300
36.9800 39.3300 36.6100 37.7800 362,900
36.5000 37.3700 35.6600 36.7000 319,300
40.2200 41.9050 36.4600 36.4800 537,800
41.8700 42.0700 38.9200 40.9000 400,100
Weekend
Weekend
42.9600 43.7700 42.1450 42.8200 645,300
43.4300 44.6100 42.3900 42.8000 416,000
43.4600 44.4900 42.9500 43.4300 185,500
41.6800 43.1550 40.5300 42.8800 188,800
No trading
Weekend
Weekend
41.8100 43.4150 40.8100 41.1300 182,600
39.1900 41.8000 38.6500 41.7500 236,900
38.3900 39.7100 36.9000 39.5000 392,300
38.9700 39.1900 37.4800 37.6800 313,500
41.4600 41.4600 38.1600 39.2400 341,500
Weekend
Weekend
41.8700 42.5500 40.0670 40.2200 273,200
42.7000 44.2200 41.5000 42.7700 342,400
40.7800 43.5400 40.2350 43.1200 529,600
45.0700 46.0700 40.7500 40.9400 525,200
9 · 10-Q Pre-market · 07:17 ET 10-Q ↗ 8 · 8-K Pre-market · 07:08 ET 8-K ↗
44.6800 48.4450 44.5100 45.9500 670,700
Weekend
Weekend
43.9300 45.1000 43.3550 44.2300 405,300
43.3500 45.8000 42.3300 43.3100 777,600
41.1500 43.8600 40.4300 43.2900 311,300
41.5300 43.7340 40.4200 40.9700 321,300
38.6400 41.4500 38.6400 40.4500 341,500
Weekend
Weekend
38.5700 40.2950 38.0700 39.1500 212,700
37.8200 38.9200 37.6700 38.7000 241,700
39.0100 40.3000 36.5000 37.4300 317,700
39.6800 41.1450 38.5800 39.5900 404,700
7 · DEFA14A After-hours · 16:08 ET DEFA14A ↗ 6 · DEF 14A After-hours · 16:04 ET DEF 14A ↗
38.0200 42.2100 37.9650 39.2100 623,700
Weekend
Weekend
38.3500 38.6100 35.1000 38.1100 518,000
43.0800 44.1200 37.8000 38.3500 449,500
41.8100 43.6300 41.7200 43.2000 363,500
43.0100 43.4100 41.3400 41.7900 366,800
43.5400 44.7100 41.9800 42.6400 448,000
Weekend
Weekend
46.1300 46.4580 43.3100 43.5400 508,800
44.4100 46.0600 42.8600 45.2400 817,600
44.2300 46.1000 42.6190 45.0900 768,500
41.8600 44.7100 41.1150 43.3000 900,100
37.9500 41.8400 36.9100 41.7700 382,800
Weekend
Weekend
38.8200 38.8200 36.2350 37.8900 223,100
36.7500 40.0400 36.7300 38.8900 352,500
38.3600 38.3700 36.1800 36.9500 274,400
37.1500 38.6050 35.3900 36.7600 373,500
40.0900 40.4250 37.2800 37.3800 191,900
Weekend
Weekend
No trading
40.7900 42.6200 40.1900 40.4900 527,800
40.1600 42.3000 40.0000 41.3000 516,300
37.4900 41.6100 37.4900 40.0900 569,900
36.1800 37.7550 35.3600 36.6600 344,200
Weekend
Weekend
37.0400 38.2200 36.0100 36.1600 497,900
37.4300 38.7100 35.9300 37.9600 273,800
34.9500 38.2000 34.9500 37.0800 285,600
35.8100 36.1800 33.6450 34.7600 259,600
36.9900 38.2900 35.6400 36.4300 346,700
Weekend
Weekend
35.4500 37.4100 34.8100 36.3900 339,200
34.1600 36.1700 33.2000 35.4900 218,700
35.5700 36.4200 34.0200 34.4000 296,000
37.1700 37.7400 34.3500 35.8400 243,700
37.6500 39.0300 36.5850 37.1700 362,400
Weekend
Weekend
36.6800 37.9500 36.2100 37.3200 320,300
37.6300 37.8700 34.6300 36.6800 202,200
37.6300 39.0000 37.6300 38.3800 186,400
37.6300 39.1700 37.6000 38.0800 255,400
35.5800 38.0600 35.5800 37.5300 318,200
Weekend
Weekend
32.8500 36.2250 32.7700 35.9300 310,400
34.1300 34.8700 32.7150 34.5600 611,700
34.1900 35.9300 33.6050 34.5700 208,000
33.9200 34.7700 32.6100 34.0900 220,200
32.8900 35.1000 32.5650 33.9200 276,000
5 · 10-K Pre-market · 07:19 ET 10-K ↗ 4 · 8-K Pre-market · 07:09 ET 8-K ↗ 3 · S-3ASR Pre-market · 08:18 ET S-3ASR ↗
Weekend
Weekend
37.2500 38.3200 36.2400 36.5400 183,100
38.0600 38.3700 36.7400 38.0000 139,800
37.6000 39.3200 37.0000 38.0300 197,100
36.9900 38.8350 36.1100 37.3200 290,800
34.9900 38.1200 34.7200 36.1000 102,900
Weekend
Weekend
37.1200 37.5000 35.4600 35.4900 145,500
37.4300 38.1750 36.6540 37.3400 181,400
37.6400 38.9100 36.9450 37.7300 104,500
37.5300 38.5100 37.2350 38.0300 117,400
No trading
Weekend
Weekend
37.6400 39.8650 37.0200 37.5200 332,900
36.3000 38.8600 36.0700 37.6400 199,800
38.0500 38.9150 35.6700 36.5300 389,700
36.6700 38.5550 35.7000 38.0150 321,200
35.9700 37.2000 35.0200 36.8200 311,900
Weekend
Weekend
35.2300 38.2000 34.8700 36.1100 440,000
40.4400 41.6150 32.4600 35.2500 563,000
44.5000 44.5000 41.0800 41.3150 332,500
44.4200 44.8800 42.6900 44.4800 312,300
42.0600 44.9900 40.8900 43.6500 911,900
Weekend
Weekend
42.0500 43.0000 40.7050 42.2600 229,500
42.7200 43.7450 41.5100 42.4400 212,200
43.8100 44.1900 41.9800 42.1300 180,700
42.1400 43.7700 42.0800 43.4000 107,000
40.9100 42.7050 40.3150 42.6000 148,400
Weekend
Weekend
41.3000 43.1350 41.3000 42.3800 199,500
40.2900 42.6400 39.9850 41.7700 664,400
40.0400 41.4950 39.1100 40.7900 192,300
38.3200 40.9800 37.7000 40.0100 155,300
No trading
Weekend
Weekend
38.9000 40.9700 38.5200 39.1100 264,900
41.4800 41.4800 37.8200 38.8500 263,800
36.8900 41.7300 36.1240 41.1800 280,200
35.9600 37.1730 34.6250 36.8100 241,200
39.0300 39.0300 34.8050 36.3400 191,400
Weekend
Weekend
36.7900 39.7000 36.7900 39.2500 414,400
42.7000 42.7050 35.9500 36.6000 406,200
38.1400 43.3000 37.7700 43.2100 477,300
40.3900 41.6500 37.0800 37.2200 266,800
39.0000 40.9200 38.2200 40.8500 299,800
Weekend
Weekend
41.4600 41.5600 38.9300 39.2100 318,900
No trading
41.0000 42.5400 40.9250 41.1400 332,600
42.4300 43.5000 41.0000 41.3900 251,500
43.7000 45.0000 42.8000 42.8100 133,700
Weekend
Weekend
43.4300 44.4900 40.5800 43.7000 166,300
No trading
44.0300 44.7000 43.8150 44.0250 157,600
42.6700 43.7800 41.5900 43.4400 186,100
42.0700 42.9000 40.4800 42.4200 243,400
Weekend
Weekend
43.7000 45.0000 42.2400 42.3700 1,954,700
43.9100 44.5200 42.4300 44.2100 290,500
42.8100 44.6100 41.9250 43.0900 296,600
43.0500 43.7050 41.1800 42.8900 252,400
43.4100 44.9900 42.0500 42.7600 340,500
Weekend
Weekend
41.6300 43.2000 41.3200 42.7700 203,600
40.7800 43.1500 40.7520 41.7200 241,200
41.0200 41.7900 40.3700 41.2100 234,400
40.9900 42.0950 40.2200 41.5900 180,000
40.1300 42.0500 39.9100 40.7200 205,800
Weekend
Weekend
41.0500 42.0200 39.7500 40.2900 211,500
41.1600 42.3500 40.4800 40.8800 171,900
39.0000 43.9000 37.5350 41.1600 385,400
38.7500 40.5300 38.0200 39.0100 348,600
40.7600 41.1100 35.4200 38.9600 710,900
Weekend
Weekend
43.2000 43.8500 41.8700 43.5700 222,800
No trading
44.0200 44.8000 43.5300 43.7900 179,800
43.9400 44.7100 43.2850 44.2800 236,000
44.0000 45.0000 43.2600 44.3800 415,200
Weekend
Weekend
38.6800 43.9300 38.6800 43.6600 272,400
38.7400 40.5050 38.0000 38.9400 157,100
40.1200 40.5950 38.3700 38.4100 255,600
39.7100 40.1150 36.8080 39.1200 244,200
37.7000 42.6150 37.7000 39.9300 449,700
Weekend
Weekend
35.6400 37.7550 35.4650 37.0000 117,100
36.1600 36.1750 34.7000 35.8800 207,200
36.4700 37.9800 35.8350 36.5800 246,200
35.8900 36.8800 34.8750 36.4600 141,300
35.1200 36.4100 34.3400 35.7700 160,900
Weekend
Weekend
34.4000 35.0050 32.6500 34.7100 225,300
34.9700 35.3150 33.5200 34.4000 273,500
35.5500 35.5500 32.4000 35.0800 240,700
2 · 10-Q Pre-market · 07:28 ET 10-Q ↗ 1 · 8-K Pre-market · 07:14 ET 8-K ↗
35.3500 36.6350 33.9900 35.6400 199,800
37.1600 39.4900 34.6900 36.0600 158,100
Weekend
Weekend
37.5500 39.2600 37.5500 38.2100 135,600
37.3100 38.4000 37.1450 38.0100 118,800
39.2600 39.9880 36.0600 37.5200 130,000
37.3800 40.0800 37.3800 39.4500 288,100
39.3400 39.9000 37.0640 38.3300 169,700
Weekend
Weekend
40.3300 40.3900 38.6750 39.2100 519,000

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.

14 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:15 ET Summarise
12 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 07:19 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:12 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
9 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 07:17 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:08 ET Summarise
7 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
6 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:04 ET Summarise
5 10-K 10-K (opens SEC filing in a new tab) Pre-market · 07:19 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:09 ET Summarise
3 S-3ASR S-3ASR (opens SEC filing in a new tab) Pre-market · 08:18 ET Summarise
2 10-Q 10-Q (opens SEC filing in a new tab) Pre-market · 07:28 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:14 ET Summarise