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Sionna Therapeutics, Inc.

SION Net buying
CIK 0002036042 #3720 in the set updated 17 Sep 2026
Bought (120 mo)
$63.41M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$174.64M
$135.40M on a plan · $7.77M straight out of an exercise
Sold at will
$31.46M
45 of 158 sales
Net
−$111.23M
+$31.95M against sales at will

By person

9 insiders · 166 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%
$110.80M
—
Thompson Peter A.
Director
$9.90M (1)
$55.67M (20) scheduled
−$45.77M
2,469,959
5.46%
$110.80M
—
Booth Bruce
Director
$1.08M (1)
$22.09M (50) scheduled
−$21.01M
686,567
1.52%
$30.80M
—
TPG GP A, LLC entity
10% owner
$21.20M (2)
$10.00M (1)
+$11.20M
6,494,962
14.37%
$291.36M
+849.0%
Cloonan Michael
President & CEO
—
$6.33M (12) scheduled
−$6.33M
547,343
1.21%
$24.55M
0.0%
Ridloff Elena
CFO
—
$1.97M (7) scheduled
−$1.97M
38,532
0.0852%
$1.73M
−68.8%
Fitzpatrick Jennifer
Chief Legal Officer
—
$1.45M (4) scheduled
−$1.45M
0
0.0000%
$0.00
—
RA CAPITAL MANAGEMENT, L.P. entity
Director
$20.25M (2)
$21.46M (44)
−$1.21M
159,033
0.3517%
$7.13M
—
Atlas Venture Fund XI, L.P. entity
10% owner
$1.08M (1)
—
+$1.08M
3,694,020
8.17%
$165.71M
—

Individual transactions

97
Insider
Date
Role
Action
Shares
Price
Amount
ORBIMED ADVISORS LLC
7 Jul 2026
Director
Sold on a plan indirect
85,918
$44.86
$3.85M
Thompson Peter A.
7 Jul 2026
Director
Sold on a plan indirect
85,918
$44.86
$3.85M
ORBIMED ADVISORS LLC
30 Jun 2026
Director
Sold on a plan indirect
115,844
$45.50
$5.27M
Thompson Peter A.
30 Jun 2026
Director
Sold on a plan indirect
115,844
$45.50
$5.27M
ORBIMED ADVISORS LLC
27 May 2026
Director
Sold on a plan indirect
101
$44.49
$4.49K
Thompson Peter A.
27 May 2026
Director
Sold on a plan indirect
101
$44.49
$4.49K
ORBIMED ADVISORS LLC
11 May 2026
Director
Sold on a plan indirect
184,639
$46.22
$8.53M
Thompson Peter A.
11 May 2026
Director
Sold on a plan indirect
184,639
$46.22
$8.53M
ORBIMED ADVISORS LLC
8 May 2026
Director
Sold on a plan indirect
59,767
$44.58
$2.66M
Thompson Peter A.
8 May 2026
Director
Sold on a plan indirect
59,767
$44.58
$2.66M
ORBIMED ADVISORS LLC
7 May 2026
Director
Sold on a plan indirect
48,546
$44.61
$2.17M
Thompson Peter A.
7 May 2026
Director
Sold on a plan indirect
48,546
$44.61
$2.17M
ORBIMED ADVISORS LLC
18 Apr 2026
Director
Sold on a plan indirect
2,948
$44.52
$131.24K
Thompson Peter A.
18 Apr 2026
Director
Sold on a plan indirect
2,948
$44.52
$131.24K
ORBIMED ADVISORS LLC
17 Apr 2026
Director
Sold on a plan indirect
52,397
$44.68
$2.34M
Thompson Peter A.
17 Apr 2026
Director
Sold on a plan indirect
52,397
$44.68
$2.34M
ORBIMED ADVISORS LLC
16 Apr 2026
Director
Sold on a plan indirect
226,906
$45.34
$10.29M
Thompson Peter A.
16 Apr 2026
Director
Sold on a plan indirect
226,906
$45.34
$10.29M
ORBIMED ADVISORS LLC
15 Apr 2026
Director
Sold on a plan indirect
235,863
$44.64
$10.53M
Thompson Peter A.
15 Apr 2026
Director
Sold on a plan indirect
235,863
$44.64
$10.53M
ORBIMED ADVISORS LLC
14 Apr 2026
Director
Sold on a plan indirect
47,814
$44.51
$2.13M
Thompson Peter A.
14 Apr 2026
Director
Sold on a plan indirect
47,814
$44.51
$2.13M
ORBIMED ADVISORS LLC
3 Feb 2026
Director
Sold on a plan indirect
29,063
$44.58
$1.30M
Thompson Peter A.
3 Feb 2026
Director
Sold on a plan indirect
29,063
$44.58
$1.30M
ORBIMED ADVISORS LLC
2 Feb 2026
Director
Sold on a plan indirect
1,890
$44.57
$84.24K
Thompson Peter A.
2 Feb 2026
Director
Sold on a plan indirect
1,890
$44.57
$84.24K
Thompson Peter A.
24 Dec 2025
Director
Sold on a plan indirect
33,356
$44.55
$1.49M
ORBIMED ADVISORS LLC
24 Dec 2025
Director
Sold on a plan indirect
33,356
$44.55
$1.49M
Thompson Peter A.
19 Dec 2025
Director
Sold on a plan indirect
875
$44.49
$38.93K
ORBIMED ADVISORS LLC
19 Dec 2025
Director
Sold on a plan indirect
875
$44.49
$38.93K
Thompson Peter A.
18 Dec 2025
Director
Sold on a plan indirect
100
$44.49
$4.45K
ORBIMED ADVISORS LLC
18 Dec 2025
Director
Sold on a plan indirect
100
$44.49
$4.45K
Thompson Peter A.
17 Dec 2025
Director
Sold on a plan indirect
900
$44.50
$40.05K
ORBIMED ADVISORS LLC
17 Dec 2025
Director
Sold on a plan indirect
900
$44.50
$40.05K
Thompson Peter A.
26 Nov 2025
Director
Sold on a plan indirect
1,600
$44.49
$71.18K
ORBIMED ADVISORS LLC
26 Nov 2025
Director
Sold on a plan indirect
1,600
$44.49
$71.18K
Thompson Peter A.
25 Nov 2025
Director
Sold on a plan indirect
11,890
$44.60
$530.29K
ORBIMED ADVISORS LLC
25 Nov 2025
Director
Sold on a plan indirect
11,890
$44.60
$530.29K
Thompson Peter A.
24 Nov 2025
Director
Sold on a plan indirect
94,583
$44.54
$4.21M
ORBIMED ADVISORS LLC
24 Nov 2025
Director
Sold on a plan indirect
94,583
$44.54
$4.21M
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
17
$36.42
$619.14
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
83
$36.42
$3.02K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
5,316
$35.69
$189.73K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
25,327
$35.69
$903.92K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
1,210
$34.91
$42.24K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
5,763
$34.91
$201.19K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
4,187
$33.87
$141.81K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
19,948
$33.87
$675.64K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
4,688
$32.69
$153.25K
Booth Bruce
21 Oct 2025
Director
Sold on a plan indirect
22,339
$32.69
$730.26K
Booth Bruce
20 Oct 2025
Director
Sold on a plan indirect
5,412
$32.33
$174.97K
Booth Bruce
20 Oct 2025
Director
Sold on a plan indirect
25,788
$32.33
$833.73K
Booth Bruce
20 Oct 2025
Director
Sold on a plan indirect
4,300
$31.79
$136.70K
Booth Bruce
20 Oct 2025
Director
Sold on a plan indirect
20,485
$31.79
$651.22K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
52
$33.47
$1.74K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
248
$33.47
$8.30K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
4,503
$32.71
$147.29K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
21,451
$32.71
$701.66K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
6,049
$32.10
$194.17K
Booth Bruce
17 Oct 2025
Director
Sold on a plan indirect
28,821
$32.10
$925.15K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
2,705
$33.38
$90.29K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
12,888
$33.38
$430.20K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
15,384
$32.84
$505.21K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
73,296
$32.84
$2.41M
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
9,470
$31.69
$300.10K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
45,117
$31.69
$1.43M
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
1,804
$30.15
$54.39K
Booth Bruce
16 Oct 2025
Director
Sold on a plan indirect
8,596
$30.15
$259.17K
Booth Bruce
15 Oct 2025
Director
Sold on a plan indirect
6,303
$31.12
$196.15K
Booth Bruce
15 Oct 2025
Director
Sold on a plan indirect
30,032
$31.12
$934.60K
Booth Bruce
15 Oct 2025
Director
Sold on a plan indirect
13,795
$30.37
$418.95K
Booth Bruce
15 Oct 2025
Director
Sold on a plan indirect
65,726
$30.37
$2.00M
Booth Bruce
14 Oct 2025
Director
Sold on a plan indirect
105
$29.95
$3.14K
Booth Bruce
14 Oct 2025
Director
Sold on a plan indirect
501
$29.95
$15.00K
Booth Bruce
13 Oct 2025
Director
Sold on a plan indirect
857
$31.03
$26.59K
Booth Bruce
13 Oct 2025
Director
Sold on a plan indirect
4,082
$31.03
$126.66K
Booth Bruce
13 Oct 2025
Director
Sold on a plan indirect
9,245
$30.32
$280.31K
Booth Bruce
13 Oct 2025
Director
Sold on a plan indirect
44,048
$30.32
$1.34M
Booth Bruce
10 Oct 2025
Director
Sold on a plan indirect
3,511
$29.98
$105.26K
Booth Bruce
10 Oct 2025
Director
Sold on a plan indirect
16,727
$29.98
$501.48K
Booth Bruce
6 Oct 2025
Director
Sold on a plan indirect
2,047
$29.95
$61.31K
Booth Bruce
6 Oct 2025
Director
Sold on a plan indirect
9,753
$29.95
$292.10K
Booth Bruce
3 Oct 2025
Director
Sold on a plan indirect
6,548
$30.00
$196.44K
Booth Bruce
3 Oct 2025
Director
Sold on a plan indirect
31,198
$30.00
$935.94K
Booth Bruce
1 Oct 2025
Director
Sold on a plan indirect
35
$29.95
$1.05K
Booth Bruce
1 Oct 2025
Director
Sold on a plan indirect
165
$29.95
$4.94K
Booth Bruce
30 Sep 2025
Director
Sold on a plan indirect
2,149
$30.06
$64.60K
Booth Bruce
30 Sep 2025
Director
Sold on a plan indirect
10,239
$30.06
$307.78K
Booth Bruce
29 Sep 2025
Director
Sold on a plan indirect
11,468
$30.09
$345.07K
Booth Bruce
29 Sep 2025
Director
Sold on a plan indirect
54,637
$30.09
$1.64M
Ridloff Elena
2 Sep 2025
CFO & Head of Corp. Dev.
Sold on a plan
8,836
$25.08
$221.61K
Ridloff Elena
29 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
748
$25.18
$18.83K
Ridloff Elena
28 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
16,098
$25.97
$418.07K
Ridloff Elena
27 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
3,618
$25.10
$90.81K
Ridloff Elena
26 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
3,700
$25.13
$92.98K
Ridloff Elena
20 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
17,500
$22.69
$397.08K
Ridloff Elena
19 Aug 2025
CFO & Head of Corp. Dev.
Sold on a plan
34,500
$21.08
$727.26K
Show all 166 transactions →

What was left out

Form 4 filings counted 77
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 21
Sales on a Rule 10b5-1 plan 97
Sales straight out of an exercise 16
Sales at will 45
Transactions with no price 0
Shares from compensation/vesting 26,645,998
History held since 10 Feb 2025