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Sionna Therapeutics, Inc

SIONNASDAQ · Pharmaceutical Preparations
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Last 12 months

Sales planned on beside the trades reported on , and whether each names a .

Planned ·

$128.5M

51 notices · 6,107,807 sh

Oct 2025 to Oct 2026

Reported ·

$148.0M

130 sales · 0 buys

Oct 2025 to Jun 2026

The two figures cover different periods.

85 of 130 reported sales carry the 10b5-1 box. Together they are 7.90% of the shares on issue.

PLANNED · FORM 144Oct 2025 to Oct 2026REPORTED · FORM 4Oct 2025 to Jun 2026N2025DJ2026FMAMJJASO2026-09-17: RA Capital Healthcare Fund, L.P., Form 1442026-07-06: JENNIFER FITZPATRICK, Form 1442026-05-29: OrbiMed Private Investments VIII, LP, Form 1442026-03-05: JENNIFER FITZPATRICK, Form 1442026-01-22: Rise Fund Sling, L.P., Form 1442026-01-22: Rise Fund Sling II, L.P., Form 1442025-12-05: JENNIFER R FITZPATRICK, Form 1442025-11-24: OrbiMed Private Investments VIII, LP, Form 1442025-11-21: RA Capital Healthcare Fund LP, Form 1442025-11-21: RA Capital Nexus Fund III, L.P., Form 1442025-11-21: RA Capital Nexus Fund, L.P., Form 1442025-11-21: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-11-20: RA Capital Nexus Fund III, L.P., Form 1442025-11-20: RA Capital Nexus Fund, L.P., Form 1442025-11-20: RA Capital Healthcare Fund LP, Form 1442025-11-20: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-11-19: RA Capital Healthcare Fund LP, Form 1442025-11-19: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-11-19: RA Capital Nexus Fund, L.P., Form 1442025-11-19: RA Capital Nexus Fund III, L.P., Form 1442025-11-18: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-11-18: RA Capital Nexus Fund, L.P., Form 1442025-11-18: RA Capital Nexus Fund III, L.P., Form 1442025-11-18: RA Capital Healthcare Fund LP, Form 1442025-11-17: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-11-17: RA Capital Nexus Fund, L.P., Form 1442025-11-17: RA Capital Nexus Fund III, L.P., Form 1442025-11-17: RA Capital Healthcare Fund LP, Form 1442025-10-28: RA Capital Nexus Fund III, L.P., Form 1442025-10-28: RA Capital Healthcare Fund LP, Form 1442025-10-28: RA Capital Nexus Fund, L.P., Form 1442025-10-28: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-10-24: RA Capital Nexus Fund, L.P., Form 1442025-10-24: RA Capital Nexus Fund III, L.P., Form 1442025-10-24: RA Capital Healthcare Fund LP, Form 1442025-10-24: BLACKWELL PARTNERS LLC - SERIES A, Form 1442025-10-21: MICHAEL CLOONAN, Form 1442025-10-21: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-21: Atlas Venture Fund XI, LP, Form 1442025-10-20: Atlas Venture Fund XI, LP, Form 1442025-10-20: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-17: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-17: Atlas Venture Fund XI, LP, Form 1442025-10-16: MICHAEL CLOONAN, Form 1442025-10-16: Atlas Venture Fund XI, LP, Form 1442025-10-16: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-15: MICHAEL CLOONAN, Form 1442025-10-13: Atlas Venture Fund XI, LP, Form 1442025-10-13: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-10: Atlas Venture Opportunity Fund II, L.P., Form 1442025-10-10: Atlas Venture Fund XI, LP, Form 1442025-10-10: Booth Bruce, sold2025-10-15: Cloonan Michael, sold2025-10-16: Booth Bruce, sold2025-10-21: Booth Bruce, sold2025-10-21: Cloonan Michael, sold2025-10-24: RA Capital Healthcare Fund LP, sold2025-11-17: RA Capital Healthcare Fund LP, sold2025-11-20: RA Capital Healthcare Fund LP, sold2025-11-24: Thompson Peter A., sold2025-11-24: ORBIMED ADVISORS LLC, sold2025-12-05: Fitzpatrick Jennifer, sold2025-12-17: Thompson Peter A., sold2025-12-17: ORBIMED ADVISORS LLC, sold2025-12-24: Thompson Peter A., sold2025-12-24: ORBIMED ADVISORS LLC, sold2026-01-22: COULTER JAMES G, sold2026-02-02: ORBIMED ADVISORS LLC, sold2026-02-02: Thompson Peter A., sold2026-03-05: Fitzpatrick Jennifer, sold2026-04-14: ORBIMED ADVISORS LLC, sold2026-04-14: Thompson Peter A., sold2026-04-17: ORBIMED ADVISORS LLC, sold2026-04-17: Thompson Peter A., sold2026-05-07: ORBIMED ADVISORS LLC, sold2026-05-07: Thompson Peter A., sold2026-05-27: ORBIMED ADVISORS LLC, sold2026-05-27: Thompson Peter A., sold
under a no plan named▼ salesize is dollars

Form 144 notices, newest first

2026-09-17RA Capital Healthcare Fund, L.P., Director, 10% Stockholder$21.8M
3,448,811 shno plan dateForm 4s on file end Jun 23144 ↗
2026-07-06JENNIFER FITZPATRICK, Chief Legal Officer$450,898
10,250 shplan 2025-06-05Form 4s on file end Jun 23144 ↗
2026-05-29OrbiMed Private Investments VIII, LP, Shareholder$9,029,710
210,876 shplan 2025-02-10144 ↗
Form 4, 2026-05-29: sold 101 at $44.49 Form 4 ↗
2026-03-05JENNIFER FITZPATRICK, Chief Legal Officer$354,343
10,250 shplan 2025-06-05144 ↗
Form 4, 2026-03-06: sold 10,250 at $33.86 Form 4 ↗
2026-01-22Rise Fund Sling, L.P., Stockholder$8,173,011
195,667 shno plan dateno Form 4 on file144 ↗
2026-01-22Rise Fund Sling II, L.P., Stockholder$2,269,489
54,333 shno plan dateno Form 4 on file144 ↗
2025-12-05JENNIFER R FITZPATRICK, Chief Legal Officer$419,020
10,250 shplan 2025-06-05144 ↗
Form 4, 2025-12-09: sold 10,250 at $40.52 Form 4 ↗
2025-11-24OrbiMed Private Investments VIII, LP, Shareholder$46.5M
1,047,770 shplan 2025-02-10144 ↗
Form 4, 2025-11-26: sold 108,073 at $44.55 Form 4 ↗
2025-11-21RA Capital Healthcare Fund LP, Director, 10% Stockholder$52,829
1,210 shno plan dateno Form 4 on file144 ↗
2025-11-21RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$281,170
6,440 shno plan dateno Form 4 on file144 ↗
2025-11-21RA Capital Nexus Fund, L.P., Director, 10% Stockholder$433,282
9,924 shno plan dateno Form 4 on file144 ↗
2025-11-21BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$332,209
7,609 shno plan dateno Form 4 on file144 ↗
2025-11-20RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$51,128
1,313 shno plan date144 ↗
Form 4, 2025-11-24: sold 30,316 at $39.61 Form 4 ↗
2025-11-20RA Capital Nexus Fund, L.P., Director, 10% Stockholder$78,776
2,023 shno plan dateno Form 4 on file144 ↗
2025-11-20RA Capital Healthcare Fund LP, Director, 10% Stockholder$9,579
246 shno plan dateno Form 4 on file144 ↗
2025-11-20BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$60,396
1,551 shno plan dateno Form 4 on file144 ↗
2025-11-19RA Capital Healthcare Fund LP, Director, 10% Stockholder$89,115
2,278 shno plan dateno Form 4 on file144 ↗
2025-11-19BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$550,568
14,334 shno plan dateno Form 4 on file144 ↗
2025-11-19RA Capital Nexus Fund, L.P., Director, 10% Stockholder$718,113
18,696 shno plan dateno Form 4 on file144 ↗
2025-11-19RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$466,066
12,134 shno plan dateno Form 4 on file144 ↗
2025-11-18BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$81,671
2,092 shno plan dateno Form 4 on file144 ↗
2025-11-18RA Capital Nexus Fund, L.P., Director, 10% Stockholder$106,501
2,728 shno plan dateno Form 4 on file144 ↗
2025-11-18RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$69,100
1,770 shno plan dateno Form 4 on file144 ↗
2025-11-18RA Capital Healthcare Fund LP, Director, 10% Stockholder$12,961
332 shno plan dateno Form 4 on file144 ↗
2025-11-17BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$989,146
24,772 shno plan dateno Form 4 on file144 ↗
2025-11-17RA Capital Nexus Fund, L.P., Director, 10% Stockholder$1,290,138
32,310 shno plan date144 ↗
Form 4, 2025-11-19: sold 136,351 at $40.34 Form 4 ↗
2025-11-17RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$837,292
20,969 shno plan dateno Form 4 on file144 ↗
2025-11-17RA Capital Healthcare Fund LP, Director, 10% Stockholder$157,164
3,936 shno plan dateno Form 4 on file144 ↗
2025-10-28RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$675,305
17,118 shno plan dateno Form 4 on file144 ↗
2025-10-28RA Capital Healthcare Fund LP, Director, 10% Stockholder$142,967
3,624 shno plan dateno Form 4 on file144 ↗
2025-10-28RA Capital Nexus Fund, L.P., Director, 10% Stockholder$1,238,414
31,392 shno plan dateno Form 4 on file144 ↗
2025-10-28BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$413,278
10,476 shno plan dateno Form 4 on file144 ↗
2025-10-24RA Capital Nexus Fund, L.P., Director, 10% Stockholder$4,794,246
122,271 shno plan date144 ↗
Form 4, 2025-10-28: sold 373,610 at $39.51 Form 4 ↗
2025-10-24RA Capital Nexus Fund III, L.P., Director, 10% Stockholder$2,614,209
66,672 shno plan dateno Form 4 on file144 ↗
2025-10-24RA Capital Healthcare Fund LP, Director, 10% Stockholder$553,488
14,116 shno plan dateno Form 4 on file144 ↗
2025-10-24BLACKWELL PARTNERS LLC - SERIES A, Director, 10% Stockholder$4,232,367
107,941 shno plan dateno Form 4 on file144 ↗
2025-10-21MICHAEL CLOONAN, President & CEO$3,213,560
99,800 shplan 2025-05-21144 ↗
Form 4, 2025-10-22: sold 99,800 at $36.26 Form 4 ↗
2025-10-21Atlas Venture Opportunity Fund II, L.P., Shareholder$496,460
15,418 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-21Atlas Venture Fund XI, LP, Shareholder$2,365,412
73,460 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-20Atlas Venture Fund XI, LP, Shareholder$1,477,497
46,273 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-20Atlas Venture Opportunity Fund II, L.P., Shareholder$310,104
9,712 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-17Atlas Venture Opportunity Fund II, L.P., Shareholder$346,857
10,604 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-17Atlas Venture Fund XI, LP, Shareholder$1,653,014
50,520 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-16MICHAEL CLOONAN, President & CEO$6,182
200 shplan 2025-05-21no Form 4 on file144 ↗
2025-10-16Atlas Venture Fund XI, LP, Shareholder$4,324,216
139,897 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-16Atlas Venture Opportunity Fund II, L.P., Shareholder$907,610
29,363 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-15MICHAEL CLOONAN, President & CEO$748,500
25,000 shplan 2025-05-21144 ↗
Form 4, 2025-10-17: sold 25,200 at $31.27 Form 4 ↗
2025-10-13Atlas Venture Fund XI, LP, Shareholder$1,430,669
48,631 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-13Atlas Venture Opportunity Fund II, L.P., Shareholder$300,278
10,207 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-10Atlas Venture Opportunity Fund II, L.P., Shareholder$99,537
3,511 shplan 2025-02-25no Form 4 on file144 ↗
2025-10-10Atlas Venture Fund XI, LP, Shareholder$474,210
16,727 shplan 2025-02-25no Form 4 on file144 ↗