NASDAQ:SION | Historical Stock Price | Sionna Therapeutics, Inc.

Complete retained daily price history on its own workbook tab. Split-adjusted close keeps every historical share price on one comparable split basis. Cumulative dividend-reinvested close is the daily close of a rebased total-return index: it starts with one share at the earliest retained close, reinvests every distribution, and normalizes every forward and reverse split exactly once. Admitted exchange opening prices remain a distinct current-session series.

Available history
2025-02-07 to 2026-09-04
Data captured

Stock Price Chart

Blue: Split-adjusted close · Orange: Cumulative dividend-reinvested close

$4.27$7.09$11.75$19.49$32.32$53.592025-02-072026-08-27

Logarithmic scale. Both lines share the same starting value for the selected range.

View year

Historical Stock Price — 2025

DateSplit-adjusted closeCumulative dividend-reinvested closeReported volumeOpen priceExchange Volume
2025-12-31$41.14$41.14332,600
2025-12-30$41.39$41.39251,500
2025-12-29$42.81$42.81133,700
2025-12-26$43.70$43.70166,300
2025-12-24$44.03$44.03157,600
2025-12-23$43.44$43.44186,100
2025-12-22$42.42$42.42243,400
2025-12-19$42.37$42.371,954,700
2025-12-18$44.21$44.21290,500
2025-12-17$43.09$43.09296,600
2025-12-16$42.89$42.89252,400
2025-12-15$42.76$42.76340,500
2025-12-12$42.77$42.77203,600
2025-12-11$41.72$41.72241,200
2025-12-10$41.21$41.21234,400
2025-12-09$41.59$41.59180,000
2025-12-08$40.72$40.72205,800
2025-12-05$40.29$40.29211,500
2025-12-04$40.88$40.88171,900
2025-12-03$41.16$41.16385,400
2025-12-02$39.01$39.01348,600
2025-12-01$38.96$38.96710,900
2025-11-28$43.57$43.57222,800
2025-11-26$43.79$43.79179,800
2025-11-25$44.28$44.28236,000
2025-11-24$44.38$44.38415,200
2025-11-21$43.66$43.66272,400
2025-11-20$38.94$38.94157,100
2025-11-19$38.41$38.41255,600
2025-11-18$39.12$39.12244,200
2025-11-17$39.93$39.93449,700
2025-11-14$37.00$37.00117,100
2025-11-13$35.88$35.88207,200
2025-11-12$36.58$36.58246,200
2025-11-11$36.46$36.46141,300
2025-11-10$35.77$35.77160,900
2025-11-07$34.71$34.71225,300
2025-11-06$34.40$34.40273,500
2025-11-05$35.08$35.08240,700
2025-11-04$35.64$35.64199,800
2025-11-03$36.06$36.06158,100
2025-10-31$38.21$38.21135,600
2025-10-30$38.01$38.01118,800
2025-10-29$37.52$37.52130,000
2025-10-28$39.45$39.45288,100
2025-10-27$38.33$38.33169,700
2025-10-24$39.21$39.21519,000
2025-10-23$39.60$39.60193,500
2025-10-22$38.90$38.90580,600
2025-10-21$42.50$42.501,287,600
2025-10-20$32.20$32.20222,500
2025-10-17$31.93$31.93277,700
2025-10-16$32.72$32.72507,900
2025-10-15$30.91$30.91340,000
2025-10-14$29.94$29.94128,000
2025-10-13$29.31$29.31405,200
2025-10-10$29.42$29.42501,300
2025-10-09$28.35$28.35538,400
2025-10-08$28.50$28.50431,900
2025-10-07$28.61$28.61153,200
2025-10-06$29.25$29.25254,500
2025-10-03$30.01$30.01212,000
2025-10-02$29.30$29.30165,300
2025-10-01$28.47$28.47204,500
2025-09-30$29.41$29.41225,100
2025-09-29$29.52$29.52532,500
2025-09-26$28.94$28.94214,500
2025-09-25$27.50$27.50182,800
2025-09-24$27.08$27.08564,500
2025-09-23$26.73$26.73356,700
2025-09-22$25.89$25.89304,300
2025-09-19$23.14$23.14493,000
2025-09-18$23.23$23.23362,100
2025-09-17$22.22$22.22261,300
2025-09-16$23.27$23.27169,000
2025-09-15$22.31$22.31102,600
2025-09-12$22.83$22.83180,300
2025-09-11$23.80$23.80131,400
2025-09-10$23.47$23.47360,000
2025-09-09$24.50$24.50442,800
2025-09-08$21.62$21.62499,300
2025-09-05$24.00$24.00323,100
2025-09-04$23.06$23.06249,200
2025-09-03$24.55$24.55617,700
2025-09-02$25.39$25.39178,700
2025-08-29$24.62$24.62103,300
2025-08-28$25.72$25.72171,100
2025-08-27$25.13$25.13174,600
2025-08-26$25.22$25.22159,000
2025-08-25$24.06$24.06135,400
2025-08-22$24.39$24.39184,600
2025-08-21$23.74$23.74152,300
2025-08-20$22.77$22.77430,100
2025-08-19$21.48$21.48152,700
2025-08-18$21.39$21.39334,500
2025-08-15$20.82$20.82260,200
2025-08-14$20.91$20.91172,300
2025-08-13$20.91$20.91175,400
2025-08-12$20.99$20.99421,000
2025-08-11$20.03$20.03165,500
2025-08-08$17.67$17.67165,100
2025-08-07$17.28$17.28122,800
2025-08-06$16.98$16.98152,700
2025-08-05$17.53$17.53107,700
2025-08-04$17.12$17.1279,600
2025-08-01$16.92$16.92122,700
2025-07-31$16.76$16.7689,900
2025-07-30$17.75$17.75163,100
2025-07-29$18.33$18.3342,900
2025-07-28$19.85$19.85140,500
2025-07-25$19.10$19.1070,200
2025-07-24$19.14$19.1493,200
2025-07-23$19.77$19.77155,900
2025-07-22$19.02$19.02117,000
2025-07-21$17.44$17.44102,400
2025-07-18$16.74$16.74395,700
2025-07-17$18.33$18.33170,300
2025-07-16$18.49$18.49273,300
2025-07-15$18.53$18.5398,400
2025-07-14$19.94$19.94122,600
2025-07-11$20.43$20.4351,600
2025-07-10$20.94$20.9481,000
2025-07-09$20.93$20.93169,200
2025-07-08$21.57$21.57148,700
2025-07-07$20.96$20.96201,800
2025-07-03$21.19$21.19122,700
2025-07-02$20.87$20.87440,100
2025-07-01$18.16$18.16177,400
2025-06-30$17.35$17.35239,900
2025-06-27$15.84$15.842,248,200
2025-06-26$14.83$14.83213,600
2025-06-25$14.97$14.97151,500
2025-06-24$16.04$16.04119,400
2025-06-23$14.10$14.10113,900
2025-06-20$14.49$14.49144,800
2025-06-18$14.73$14.7387,900
2025-06-17$13.85$13.85117,600
2025-06-16$14.31$14.31145,400
2025-06-13$16.38$16.38101,000
2025-06-12$16.99$16.99104,800
2025-06-11$17.26$17.2683,200
2025-06-10$18.26$18.26120,200
2025-06-09$16.46$16.46149,900
2025-06-06$17.22$17.22168,000
2025-06-05$16.03$16.03296,600
2025-06-04$15.80$15.80202,400
2025-06-03$14.48$14.48111,600
2025-06-02$13.97$13.9764,500
2025-05-30$13.69$13.6973,700
2025-05-29$14.11$14.11127,100
2025-05-28$12.73$12.73101,000
2025-05-27$13.08$13.08103,700
2025-05-23$12.72$12.72109,600
2025-05-22$13.01$13.01146,100
2025-05-21$13.50$13.50111,000
2025-05-20$14.01$14.01148,200
2025-05-19$14.51$14.5175,100
2025-05-16$13.43$13.43190,800
2025-05-15$13.44$13.44113,200
2025-05-14$12.00$12.00406,200
2025-05-13$12.83$12.83178,800
2025-05-12$12.90$12.90143,800
2025-05-09$12.32$12.32122,100
2025-05-08$12.57$12.5770,800
2025-05-07$12.88$12.88186,200
2025-05-06$12.76$12.76152,000
2025-05-05$12.79$12.7993,600
2025-05-02$13.58$13.58221,600
2025-05-01$12.90$12.90245,600
2025-04-30$12.03$12.0385,000
2025-04-29$12.04$12.04145,500
2025-04-28$12.04$12.0488,500
2025-04-25$12.14$12.1472,100
2025-04-24$12.60$12.6081,800
2025-04-23$13.09$13.09104,300
2025-04-22$11.93$11.9398,900
2025-04-21$11.30$11.3097,900
2025-04-17$11.07$11.07186,200
2025-04-16$10.00$10.00138,000
2025-04-15$9.52$9.52129,800
2025-04-14$8.91$8.91132,800
2025-04-11$7.87$7.87130,900
2025-04-10$7.66$7.66148,600
2025-04-09$8.88$8.88187,100
2025-04-08$8.95$8.95213,300
2025-04-07$9.73$9.73123,700
2025-04-04$9.97$9.97200,800
2025-04-03$11.61$11.61209,800
2025-04-02$11.83$11.83292,800
2025-04-01$10.16$10.16248,500
2025-03-31$10.46$10.46143,800
2025-03-28$11.56$11.5695,800
2025-03-27$11.98$11.98165,100
2025-03-26$12.04$12.04308,800
2025-03-25$12.93$12.93217,800
2025-03-24$12.10$12.10253,000
2025-03-21$13.69$13.69984,000
2025-03-20$13.88$13.88233,900
2025-03-19$13.88$13.88245,400
2025-03-18$14.33$14.33152,800
2025-03-17$14.89$14.89215,400
2025-03-14$14.98$14.9893,600
2025-03-13$17.10$17.1061,700
2025-03-12$17.11$17.11119,700
2025-03-11$16.25$16.25218,800
2025-03-10$14.90$14.90305,100
2025-03-07$16.27$16.27327,300
2025-03-06$15.65$15.65333,700
2025-03-05$16.48$16.48153,000
2025-03-04$14.80$14.80125,300
2025-03-03$14.41$14.41306,200
2025-02-28$13.77$13.77289,200
2025-02-27$14.76$14.76232,700
2025-02-26$15.52$15.52395,800
2025-02-25$17.07$17.07246,500
2025-02-24$19.71$19.71103,800
2025-02-21$19.76$19.76185,500
2025-02-20$20.11$20.11158,300
2025-02-19$19.98$19.98132,800
2025-02-18$20.04$20.0494,200
2025-02-14$20.03$20.03149,300
2025-02-13$20.28$20.28144,300
2025-02-12$19.86$19.86532,100
2025-02-11$20.41$20.41236,900
2025-02-10$22.24$22.24144,000
2025-02-07$25.00$25.001,890,300