A 15-patient trial wiped out Sionna's platform premium. Cash now exceeds market value

Sionna Therapeutics (NASDAQ:SION) fell 91.2% after SION-719 missed its key activity endpoint. We test what cash protects after the platform reset.

11 Aug 2026|12:52pm AEST

Market chart

SION · Sionna Therapeutics, Inc.

Delayed close-price history through 10 August 2026.

Latest4.5-89.1%

Low 4.50 · 10 AugHigh 51.04 · 07 Aug

Window 01 Apr to 10 AugYahoo Finance, delayed

SION · Sionna Therapeutics, Inc. chart data
Date	Close price
01 Apr	41.3
02 Apr	40.49
06 Apr	37.38
07 Apr	36.76
08 Apr	36.95
09 Apr	38.89
10 Apr	37.89
13 Apr	41.77
14 Apr	43.3
15 Apr	45.09
16 Apr	45.24
17 Apr	43.54
20 Apr	42.64
21 Apr	41.79
22 Apr	43.2
23 Apr	38.35
24 Apr	38.11
27 Apr	39.21
28 Apr	39.59
29 Apr	37.43
30 Apr	38.7
01 May	39.15
04 May	40.45
05 May	40.97
06 May	43.29
07 May	43.31
08 May	44.23
11 May	45.95
12 May	40.94
13 May	43.12
14 May	42.77
15 May	40.22
18 May	39.24
19 May	37.68
20 May	39.5
21 May	41.75
22 May	41.13
26 May	42.88
27 May	43.43
28 May	42.8
29 May	42.82
01 June	40.9
02 June	36.48
03 June	36.7
04 June	37.78
05 June	35.37
08 June	33.51
09 June	33.69
10 June	34.03
11 June	36.05
12 June	35.92
15 June	36
16 June	34.75
17 June	36.73
18 June	37.3
22 June	38.83
23 June	39.87
24 June	41.09
25 June	42.77
26 June	42.18
29 June	42.97
30 June	43.99
01 July	41.64
02 July	43.99
06 July	43.12
07 July	44.93
08 July	44
09 July	44.94
10 July	45.29
13 July	43.95
14 July	42.59
15 July	44.38
16 July	45.29
17 July	49.41
20 July	45.69
21 July	47.21
22 July	45.03
23 July	44.06
24 July	45.7
27 July	45.38
28 July	46.55
29 July	44.81
30 July	46.78
31 July	47.13
03 Aug	49.26
04 Aug	49.94
05 Aug	47.34
06 Aug	49.61
07 Aug	51.04
10 Aug	4.50

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