Stocks
SION Sionna Therapeutics, Inc.

SION

Sionna Therapeutics, Inc.

Company with tickers: SION

CIK

2036042

CUSIP

829401108

Shares Outstanding

44,998,073

Price Holdings Short Volume Short Interest Fails to Deliver SEC Filings Earnings Calls Insider Trading Congress Trades

Date	Insider	Role	Type	Shares	Price	Value	After
2026-03-05	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	—	—	50,935
2026-03-05	Fitzpatrick Jennifer	Chief Legal Officer	Sell	10,250	$33.86	$347,019	0
2026-03-05	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	$6.11	$62,628	10,250
2026-02-03	Thompson Peter A.	Director	Sell	29,063	$44.58	$1,295,629	3,530,702
2026-02-03	ORBIMED ADVISORS LLC	10% Owner	Sell	29,063	$44.58	$1,295,629	3,530,702
2026-02-02	Thompson Peter A.	Director	Sell	1,890	$44.57	$84,237	3,559,765
2026-02-02	ORBIMED ADVISORS LLC	10% Owner	Sell	1,890	$44.57	$84,237	3,559,765
2026-01-22	TPG GP A, LLC	Insider	Sell	250,000	$40.00	$10,000,000	6,494,962
2026-01-02	McKee Charlotte	Chief Medical Officer	Award	155,700	—	—	155,700
2026-01-02	Cloonan Michael	Director, President & CEO	Award	436,100	—	—	436,100
2026-01-02	Beer Caroline Stark	Chief Business Officer	Award	139,340	—	—	139,340
2026-01-02	Ridloff Elena	EVP and CFO	Award	165,440	—	—	165,440
2026-01-02	Fitzpatrick Jennifer	Chief Legal Officer	Award	103,140	—	—	103,140
2025-12-24	ORBIMED ADVISORS LLC	10% Owner	Sell	33,356	$44.55	$1,486,010	3,561,655
2025-12-24	Thompson Peter A.	Director	Sell	33,356	$44.55	$1,486,010	3,561,655
2025-12-19	ORBIMED ADVISORS LLC	10% Owner	Sell	875	$44.49	$38,929	3,595,011
2025-12-19	Thompson Peter A.	Director	Sell	875	$44.49	$38,929	3,595,011
2025-12-18	ORBIMED ADVISORS LLC	10% Owner	Sell	100	$44.49	$4,449	3,595,886
2025-12-18	Thompson Peter A.	Director	Sell	100	$44.49	$4,449	3,595,886
2025-12-17	ORBIMED ADVISORS LLC	10% Owner	Sell	900	$44.50	$40,050	3,595,986
2025-12-17	Thompson Peter A.	Director	Sell	900	$44.50	$40,050	3,595,986
2025-12-05	Fitzpatrick Jennifer	Chief Legal Officer	Sell	10,250	$40.52	$415,330	0
2025-12-05	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	—	—	61,185
2025-12-05	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	$6.11	$62,628	10,250
2025-11-26	ORBIMED ADVISORS LLC	10% Owner	Sell	1,600	$44.49	$71,184	3,596,886
2025-11-26	Thompson Peter A.	Director	Sell	1,600	$44.49	$71,184	3,596,886
2025-11-25	ORBIMED ADVISORS LLC	10% Owner	Sell	11,890	$44.60	$530,294	3,598,486
2025-11-25	Thompson Peter A.	Director	Sell	11,890	$44.60	$530,294	3,598,486
2025-11-24	ORBIMED ADVISORS LLC	10% Owner	Sell	94,583	$44.54	$4,212,727	3,610,376
2025-11-24	Thompson Peter A.	Director	Sell	94,583	$44.54	$4,212,727	3,610,376
2025-11-21	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	1,210	$39.50	$47,795	6,897,623
2025-11-20	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	150	$39.89	$5,984	6,898,929
2025-11-19	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	2,276	$40.01	$91,063	6,899,081
2025-11-18	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	332	$39.57	$13,137	6,901,357
2025-11-17	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	2,182	$40.20	$87,716	6,903,443
2025-10-28	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	3,624	$39.58	$143,438	6,905,625
2025-10-24	RA CAPITAL MANAGEMENT, L.P.	Director	Sell	14,116	$39.50	$557,582	6,909,249
2025-10-21	Cloonan Michael	Director, President & CEO	Convert	13,324	$6.11	$81,410	560,667
2025-10-21	Cloonan Michael	Director, President & CEO	Convert	13,324	—	—	139,618
2025-10-21	Cloonan Michael	Director, President & CEO	Sell	13,324	$34.44	$458,879	547,343
2025-10-21	Booth Bruce	Director	Sell	22,339	$32.69	$730,262	2,360,156
2025-10-20	Booth Bruce	Director	Sell	20,485	$31.79	$651,218	2,408,283
2025-10-17	Booth Bruce	Director	Sell	28,821	$32.10	$925,154	2,450,467
2025-10-16	Booth Bruce	Director	Sell	8,596	$30.15	$259,169	2,610,589
2025-10-16	Cloonan Michael	Director, President & CEO	Sell	10,225	$31.46	$321,691	547,343
2025-10-16	Cloonan Michael	Director, President & CEO	Convert	10,225	$6.11	$62,475	557,568
2025-10-16	Cloonan Michael	Director, President & CEO	Convert	10,225	—	—	153,142
2025-10-15	Booth Bruce	Director	Sell	65,726	$30.37	$1,996,099	2,649,217
2025-10-15	Cloonan Michael	Director, President & CEO	Convert	14,775	—	—	163,367
2025-10-15	Cloonan Michael	Director, President & CEO	Sell	14,775	$31.11	$459,662	547,343
2025-10-15	Cloonan Michael	Director, President & CEO	Convert	14,775	$6.11	$90,275	562,118
2025-10-14	Booth Bruce	Director	Sell	501	$29.95	$15,005	2,714,943
2025-10-13	Booth Bruce	Director	Sell	44,048	$30.32	$1,335,535	2,719,526
2025-10-10	Booth Bruce	Director	Sell	16,727	$29.98	$501,475	2,763,574
2025-10-06	Booth Bruce	Director	Sell	9,753	$29.95	$292,102	2,780,301
2025-10-03	Booth Bruce	Director	Sell	31,198	$30.00	$935,940	2,790,054
2025-10-01	Beer Caroline Stark	Chief Business Officer	Other	0	—	—	0
2025-10-01	Beer Caroline Stark	Chief Business Officer	Award	255,000	—	—	255,000
2025-10-01	Booth Bruce	Director	Sell	165	$29.95	$4,942	2,821,252
2025-09-30	Booth Bruce	Director	Sell	10,239	$30.06	$307,784	2,821,417
2025-09-29	Booth Bruce	Director	Sell	54,637	$30.09	$1,644,027	2,831,656
2025-09-29	Cloonan Michael	Director, President & CEO	Convert	7,793	$6.11	$47,615	555,136
2025-09-29	Cloonan Michael	Director, President & CEO	Sell	7,793	$29.70	$231,451	547,343
2025-09-29	Cloonan Michael	Director, President & CEO	Convert	7,793	—	—	178,142
2025-09-26	Cloonan Michael	Director, President & CEO	Convert	17,207	—	—	185,935
2025-09-26	Cloonan Michael	Director, President & CEO	Sell	17,207	$28.85	$496,346	547,343
2025-09-26	Cloonan Michael	Director, President & CEO	Convert	17,207	$6.11	$105,135	564,550
2025-09-04	Fitzpatrick Jennifer	Chief Legal Officer	Sell	10,250	$23.12	$236,980	0
2025-09-04	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	$6.11	$62,628	10,250
2025-09-04	Fitzpatrick Jennifer	Chief Legal Officer	Convert	10,250	—	—	71,435
2025-09-02	Ridloff Elena	EVP and CFO	Sell	8,836	$25.08	$221,607	38,532
2025-08-29	Ridloff Elena	EVP and CFO	Sell	748	$25.18	$18,835	47,368
2025-08-28	Ridloff Elena	EVP and CFO	Sell	16,098	$25.97	$418,065	48,116
2025-08-27	Cloonan Michael	Director, President & CEO	Sell	7,426	$25.01	$185,714	547,343
2025-08-27	Cloonan Michael	Director, President & CEO	Convert	7,426	$6.11	$45,373	554,769
2025-08-27	Cloonan Michael	Director, President & CEO	Convert	7,426	—	—	203,142
2025-08-27	Ridloff Elena	EVP and CFO	Sell	3,618	$25.10	$90,812	64,214
2025-08-26	Cloonan Michael	Director, President & CEO	Convert	17,574	—	—	210,568
2025-08-26	Cloonan Michael	Director, President & CEO	Sell	17,574	$24.96	$438,647	547,343
2025-08-26	Cloonan Michael	Director, President & CEO	Convert	17,574	$6.11	$107,377	564,917
2025-08-26	Ridloff Elena	EVP and CFO	Sell	3,700	$25.13	$92,981	67,832
2025-08-20	Cloonan Michael	Director, President & CEO	Convert	25,000	$6.11	$152,750	572,343
2025-08-20	Cloonan Michael	Director, President & CEO	Convert	25,000	—	—	228,142
2025-08-20	Cloonan Michael	Director, President & CEO	Sell	25,000	$22.75	$568,750	547,343
2025-08-20	Ridloff Elena	EVP and CFO	Sell	17,500	$22.69	$397,075	71,532
2025-08-19	Ridloff Elena	EVP and CFO	Sell	34,500	$21.08	$727,260	89,032
2025-06-27	TPG GP A, LLC	Insider	Buy	60,000	$15.84	$950,400	6,744,962
2025-06-12	RA CAPITAL MANAGEMENT, L.P.	Director	Award	19,959	—	—	19,959
2025-06-12	Fleming Harold Edward	Director	Award	19,959	—	—	19,959
2025-06-12	Clancy Paul J	Director	Award	19,959	—	—	19,959
2025-06-12	Booth Bruce	Director	Award	19,959	—	—	19,959
2025-06-12	Viney Joanne L.	Director	Award	19,959	—	—	19,959
2025-06-12	Thompson Peter A.	Director	Award	19,959	—	—	19,959
2025-06-12	Stelzer Laurie	Director	Award	19,959	—	—	19,959
2025-06-12	Ruddy Marcella K.	Director	Award	19,959	—	—	19,959
2025-06-12	Resnick Joshua	Director	Award	19,959	—	—	19,959
2025-04-01	Fitzpatrick Jennifer	Chief Legal Officer	Other	0	—	—	0
2025-02-10	Atlas Venture Fund XI, L.P.	10% Owner	Other	1,806,317	—	—	0
2025-02-10	Atlas Venture Fund XI, L.P.	10% Owner	Other	1,051,051	—	—	0
2025-02-10	Atlas Venture Fund XI, L.P.	10% Owner	Other	1,298,332	—	—	0