InsiderClue
← All stocks

Sionna Therapeutics, Inc.

SION Net buying
CIK 0002036042 #3720 in the set updated 22 Sep 2026
Bought (120 mo)
$63.41M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$196.47M
$135.40M on a plan · $7.77M straight out of an exercise
Sold at will
$53.30M
47 of 160 sales
Net
−$133.06M
+$10.11M against sales at will

By person

10 insiders · 168 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
ORBIMED ADVISORS LLC entity
Director
$9.90M (1)
$55.67M (20) scheduled
−$45.77M
2,469,959
5.46%
$18.43M
—
Thompson Peter A.
Director
$9.90M (1)
$55.67M (20) scheduled
−$45.77M
2,469,959
5.46%
$18.43M
—
RA CAPITAL MANAGEMENT, L.P. entity
Director
$20.25M (2)
$43.30M (46)
−$23.05M
318,066
0.7035%
$2.37M
—
Booth Bruce
Director
$1.08M (1)
$22.09M (50) scheduled
−$21.01M
686,567
1.52%
$5.12M
—
TPG GP A, LLC entity
10% owner
$21.20M (2)
$10.00M (1)
+$11.20M
6,494,962
14.37%
$48.45M
+849.0%
Cloonan Michael
President & CEO
—
$6.33M (12) scheduled
−$6.33M
765,393
1.69%
$5.71M
+39.8%
Ridloff Elena
CFO and CBO
—
$1.97M (7) scheduled
−$1.97M
133,069
0.2943%
$992.69K
+7.7%
Fitzpatrick Jennifer
CLO and Head of Program Mgmt.
—
$1.45M (4) scheduled
−$1.45M
56,265
0.1244%
$419.74K
—
Atlas Venture Fund XI, L.P. entity
10% owner
$1.08M (1)
—
+$1.08M
3,694,020
8.17%
$27.56M
—
McKee Charlotte
CMO and Head of R&D
—
—
—
128,415
0.2840%
$957.98K
+351.9%

Individual transactions

47
Insider
Date
Role
Action
Shares
Price
Amount
RA CAPITAL MANAGEMENT, L.P.
17 Sep 2026
Director
Sell indirect
33,800
$7.46
$252.15K
RA CAPITAL MANAGEMENT, L.P.
17 Sep 2026
Director
Sell indirect
3,415,011
$6.32
$21.58M
TPG GP A, LLC
22 Jan 2026
10% owner
Sell indirect
250,000
$40.00
$10.00M
RA CAPITAL MANAGEMENT, L.P.
21 Nov 2025
Director
Sell indirect
7,609
$39.50
$300.56K
RA CAPITAL MANAGEMENT, L.P.
21 Nov 2025
Director
Sell indirect
6,440
$39.50
$254.38K
RA CAPITAL MANAGEMENT, L.P.
21 Nov 2025
Director
Sell indirect
9,924
$39.50
$392.00K
RA CAPITAL MANAGEMENT, L.P.
21 Nov 2025
Director
Sell indirect
1,210
$39.50
$47.80K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
604
$40.50
$24.46K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
512
$40.50
$20.74K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
788
$40.50
$31.91K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
96
$40.50
$3.89K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
947
$39.89
$37.78K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
801
$39.89
$31.95K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
1,235
$39.89
$49.26K
RA CAPITAL MANAGEMENT, L.P.
20 Nov 2025
Director
Sell indirect
150
$39.89
$5.98K
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
9
$40.61
$365.49
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
8
$40.61
$324.88
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
12
$40.61
$487.32
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
2
$40.61
$81.22
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
14,325
$40.01
$573.14K
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
12,126
$40.01
$485.16K
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
18,684
$40.01
$747.55K
RA CAPITAL MANAGEMENT, L.P.
19 Nov 2025
Director
Sell indirect
2,276
$40.01
$91.06K
RA CAPITAL MANAGEMENT, L.P.
18 Nov 2025
Director
Sell indirect
2,092
$39.57
$82.78K
RA CAPITAL MANAGEMENT, L.P.
18 Nov 2025
Director
Sell indirect
1,770
$39.57
$70.04K
RA CAPITAL MANAGEMENT, L.P.
18 Nov 2025
Director
Sell indirect
2,728
$39.57
$107.95K
RA CAPITAL MANAGEMENT, L.P.
18 Nov 2025
Director
Sell indirect
332
$39.57
$13.14K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
331
$42.10
$13.94K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
280
$42.10
$11.79K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
433
$42.10
$18.23K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
53
$42.10
$2.23K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
10,707
$41.05
$439.52K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
9,063
$41.05
$372.04K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
13,964
$41.05
$573.22K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
1,701
$41.05
$69.83K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
13,734
$40.20
$552.11K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
11,626
$40.20
$467.37K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
17,913
$40.20
$720.10K
RA CAPITAL MANAGEMENT, L.P.
17 Nov 2025
Director
Sell indirect
2,182
$40.20
$87.72K
RA CAPITAL MANAGEMENT, L.P.
28 Oct 2025
Director
Sell indirect
10,476
$39.58
$414.64K
RA CAPITAL MANAGEMENT, L.P.
28 Oct 2025
Director
Sell indirect
17,118
$39.58
$677.53K
RA CAPITAL MANAGEMENT, L.P.
28 Oct 2025
Director
Sell indirect
31,392
$39.58
$1.24M
RA CAPITAL MANAGEMENT, L.P.
28 Oct 2025
Director
Sell indirect
3,624
$39.58
$143.44K
RA CAPITAL MANAGEMENT, L.P.
24 Oct 2025
Director
Sell indirect
107,941
$39.50
$4.26M
RA CAPITAL MANAGEMENT, L.P.
24 Oct 2025
Director
Sell indirect
66,672
$39.50
$2.63M
RA CAPITAL MANAGEMENT, L.P.
24 Oct 2025
Director
Sell indirect
122,271
$39.50
$4.83M
RA CAPITAL MANAGEMENT, L.P.
24 Oct 2025
Director
Sell indirect
14,116
$39.50
$557.58K
Show all 168 transactions →

What was left out

Form 4 filings counted 82
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 22
Sales on a Rule 10b5-1 plan 97
Sales straight out of an exercise 16
Sales at will 47
Transactions with no price 0
Shares from compensation/vesting 27,114,850
History held since 10 Feb 2025