InsiderClue
← All stocks

Cytosorbents Corp

CTSO Net buying
CIK 0001175151 #5012 in the set updated 17 Sep 2026
Bought (120 mo)
$1.25M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$3.28M
$0.00 on a plan · $3.28M straight out of an exercise
Sold at will
$0.00
0 of 37 sales
Net
−$2.02M
+$1.25M against sales at will

By person

11 insiders · 133 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
Capponi Vincent
President and COO
$67.30K (9)
$1.32M (14) scheduled
−$1.26M
40,387
0.0643%
$242.73K
—
BLOCH KATHLEEN P.
Chief Financial Officer
$210.51K (16)
$1.08M (15) scheduled
−$869.75K
621,941
0.9897%
$3.74M
+434.1%
Kraus Al
Director
$9.80K (1)
$477.87K (3) scheduled
−$468.08K
142,046
0.2260%
$853.70K
+22.7%
Chan Phillip P.
Chief Executive Officer
$645.03K (19)
$395.27K (5) scheduled
+$249.76K
100,996
0.1607%
$606.99K
—
MARIANI PETER J
Chief Financial Officer
$91.27K (4)
—
+$91.27K
638,113
1.02%
$3.84M
—
BATOR MICHAEL G.
Director
$89.89K (11)
—
+$89.89K
151,273
0.2407%
$909.15K
+140.1%
Sobel Alan D.
Director
$65.43K (6)
—
+$65.43K
9,887
0.0157%
$59.42K
—
Deliargyris Efthymios
Chief Medical Officer
$30.00K (1)
—
+$30.00K
473,025
0.7527%
$2.84M
—
Jones Edward Raymond
Director
$23.74K (4)
—
+$23.74K
88,834
0.1414%
$533.89K
+41.0%
Kim Jiny
Director
$11.91K (2)
—
+$11.91K
77,819
0.1238%
$467.69K
—
Mortensen Eric R.
Chief Medical Officer
$10.10K (1)
—
+$10.10K
148,932
0.2370%
$895.08K
+64.4%

Individual transactions

133
Insider
Date
Role
Action
Shares
Price
Amount
Sobel Alan D.
15 Sep 2026
Director
Buy
100
$6.01
$601.00
Sobel Alan D.
15 Sep 2026
Director
Buy
500
$6.05
$3.03K
Sobel Alan D.
15 Sep 2026
Director
Buy
1,900
$6.12
$11.63K
Chan Phillip P.
15 Sep 2026
Chief Executive Officer
Buy
3,774
$6.00
$22.64K
Capponi Vincent
14 Sep 2026
President and COO
Buy
273
$5.90
$1.61K
Capponi Vincent
14 Sep 2026
President and COO
Buy
1,800
$6.07
$10.93K
Chan Phillip P.
4 Sep 2026
Chief Executive Officer
Buy
200,000
$0.35
$70.00K
Chan Phillip P.
15 Jun 2026
Chief Executive Officer
Buy
10,333
$0.43
$4.44K
MARIANI PETER J
15 Jun 2026
Chief Financial Officer
Buy
100,000
$0.44
$44.00K
Chan Phillip P.
12 Jun 2026
Chief Executive Officer
Buy
251,136
$0.40
$100.45K
MARIANI PETER J
17 Jan 2025
Chief Financial Officer
Exercised, kept
32,625
$1.00
$32.63K
Chan Phillip P.
17 Jan 2025
Chief Executive Officer
Exercised, kept
90,832
$1.00
$90.83K
Sobel Alan D.
17 Jan 2025
Director
Exercised, kept
21,950
$1.00
$21.95K
Deliargyris Efthymios
17 Jan 2025
Chief Medical Officer
Exercised, kept
16,233
$1.00
$16.23K
Capponi Vincent
17 Jan 2025
President and COO
Exercised, kept
31,760
$1.00
$31.76K
BATOR MICHAEL G.
17 Jan 2025
Director
Exercised, kept
15,879
$1.00
$15.88K
MARIANI PETER J
13 Dec 2024
Chief Financial Officer
Buy
20,000
$0.96
$19.29K
MARIANI PETER J
12 Dec 2024
Chief Financial Officer
Buy
20,000
$0.89
$17.87K
MARIANI PETER J
11 Dec 2024
Chief Financial Officer
Buy
11,363
$0.89
$10.10K
Chan Phillip P.
13 Dec 2023
Chief Executive Officer
Buy
75,188
$1.33
$100.00K
Kim Jiny
13 Dec 2023
Director
Buy
7,519
$1.33
$10.00K
BLOCH KATHLEEN P.
13 Dec 2023
Chief Financial Officer
Buy
37,594
$1.33
$50.00K
Jones Edward Raymond
13 Dec 2023
Director
Buy
7,519
$1.33
$10.00K
BATOR MICHAEL G.
13 Dec 2023
Director
Buy
37,594
$1.33
$50.00K
Capponi Vincent
13 Dec 2023
President & COO
Buy
18,797
$1.33
$25.00K
Deliargyris Efthymios
13 Dec 2023
Chief Medical Officer
Buy
22,557
$1.33
$30.00K
Sobel Alan D.
13 Dec 2023
Director
Buy
22,557
$1.33
$30.00K
BATOR MICHAEL G.
7 Aug 2023
Director
Buy
1,000
$3.15
$3.15K
BATOR MICHAEL G.
7 Aug 2023
Director
Buy
1,000
$3.20
$3.20K
BATOR MICHAEL G.
4 Aug 2023
Director
Buy
1,000
$3.23
$3.23K
BLOCH KATHLEEN P.
25 May 2023
Interim CFO
Buy indirect
1,100
$2.85
$3.13K
BLOCH KATHLEEN P.
25 May 2023
Interim CFO
Buy indirect
1,100
$2.84
$3.12K
BLOCH KATHLEEN P.
25 May 2023
Interim CFO
Buy indirect
1,100
$2.85
$3.13K
BLOCH KATHLEEN P.
10 May 2023
Interim CFO
Buy indirect
3,000
$3.17
$9.51K
BLOCH KATHLEEN P.
10 May 2023
Interim CFO
Buy indirect
2,000
$3.13
$6.25K
BLOCH KATHLEEN P.
10 May 2023
Interim CFO
Buy indirect
5,000
$3.06
$15.30K
Capponi Vincent
4 Apr 2023
See Remarks
Exercised, kept
10,000
$2.88
$28.75K
Chan Phillip P.
3 Apr 2023
Chief Executive Officer
Exercised, kept
30,500
$2.88
$87.69K
Kraus Al
6 Feb 2023
Director
Exercised, kept
12,000
$2.65
$31.80K
Chan Phillip P.
8 Dec 2022
Chief Executive Officer
Buy
5,859
$1.26
$7.38K
Chan Phillip P.
7 Dec 2022
Chief Executive Officer
Buy
9,850
$1.26
$12.41K
Chan Phillip P.
6 Dec 2022
Chief Executive Officer
Buy
14,291
$1.26
$18.06K
Chan Phillip P.
8 Sep 2022
Chief Executive Officer
Buy
35,000
$1.70
$59.50K
Kim Jiny
25 Aug 2022
Director
Buy
1,000
$1.91
$1.91K
Capponi Vincent
21 Jun 2022
President and COO
Buy
2,000
$1.80
$3.60K
Chan Phillip P.
16 Jun 2022
Chief Executive Officer
Buy
2,221
$1.85
$4.11K
Capponi Vincent
16 Jun 2022
See Remarks
Buy
3,000
$2.00
$6.00K
Chan Phillip P.
9 Jun 2022
Chief Executive Officer
Buy
16,000
$2.17
$34.78K
BLOCH KATHLEEN P.
6 Jun 2022
Chief Financial Officer
Buy indirect
8,700
$1.90
$16.53K
Capponi Vincent
23 May 2022
President and COO
Buy
3,127
$2.03
$6.35K
Capponi Vincent
23 May 2022
President and COO
Buy
299
$2.03
$605.48
Capponi Vincent
23 May 2022
President and COO
Buy
1,574
$2.04
$3.21K
BATOR MICHAEL G.
18 May 2022
Director
Buy
1,000
$2.21
$2.21K
BATOR MICHAEL G.
18 May 2022
Director
Buy
2,000
$2.20
$4.40K
BATOR MICHAEL G.
18 May 2022
Director
Buy
2,000
$2.20
$4.40K
BATOR MICHAEL G.
18 May 2022
Director
Buy
2,000
$2.20
$4.40K
BATOR MICHAEL G.
18 May 2022
Director
Buy
2,000
$2.18
$4.36K
BATOR MICHAEL G.
18 May 2022
Director
Buy
2,000
$2.18
$4.36K
Jones Edward Raymond
16 May 2022
Director
Buy
1,676
$2.24
$3.75K
Sobel Alan D.
11 May 2022
Director
Buy
8,800
$2.02
$17.78K
Sobel Alan D.
11 May 2022
Director
Buy
1,200
$2.00
$2.40K
Kraus Al
6 May 2022
Director
Buy
5,000
$1.96
$9.80K
Chan Phillip P.
30 Dec 2021
Chief Executive Officer
Buy
5,462
$4.05
$22.12K
Chan Phillip P.
29 Dec 2021
Chief Executive Officer
Buy
9,438
$4.05
$38.22K
Chan Phillip P.
29 Dec 2021
Chief Executive Officer
Buy
100
$4.04
$404.00
Chan Phillip P.
10 Dec 2021
Chief Executive Officer
Buy
5,000
$5.25
$26.25K
Jones Edward Raymond
9 Dec 2021
Director
Exercised, kept
4,000
$4.13
$16.50K
BLOCH KATHLEEN P.
23 Nov 2021
Chief Financial Officer
Buy indirect
4,000
$4.98
$19.92K
Kraus Al
31 Aug 2021
Director
Sold after exercise
4,000
$9.40
$37.59K
BLOCH KATHLEEN P.
31 Dec 2020
Chief Financial Officer
Exercised, kept
7,857
$5.60
$44.00K
Kraus Al
10 Nov 2020
Director
Sold after exercise
8,000
$8.00
$64.00K
Jones Edward Raymond
18 Aug 2020
Director
Exercised, kept
4,000
$3.35
$13.40K
BLOCH KATHLEEN P.
31 Jul 2020
Chief Financial Officer
Exercised, kept
10,000
$5.60
$56.00K
Chan Phillip P.
5 May 2020
Chief Executive Officer
Exercised, kept
14,100
$9.39
$132.40K
Capponi Vincent
5 May 2020
President and COO
Exercised, kept
10,123
$9.26
$93.74K
Capponi Vincent
27 Apr 2020
Chief Operating Officer
Sold after exercise
10,000
$10.00
$100.00K
Capponi Vincent
10 Mar 2020
Chief Operating Officer
Sold after exercise
4,677
$6.00
$28.06K
BLOCH KATHLEEN P.
10 Dec 2019
Chief Financial Officer
Buy
3,000
$3.68
$11.03K
Chan Phillip P.
6 Dec 2019
President and CEO
Buy
16,500
$3.60
$59.40K
BLOCH KATHLEEN P.
26 Nov 2019
Chief Financial Officer
Buy indirect
1,000
$4.27
$4.27K
Capponi Vincent
16 Aug 2019
Chief Operating Officer
Exercised, kept
4,600
$4.33
$19.90K
BLOCH KATHLEEN P.
16 Aug 2019
Chief Financial Officer
Buy indirect
6,500
$4.83
$31.40K
Chan Phillip P.
15 Aug 2019
President and CEO
Exercised, kept
75,000
$3.45
$258.75K
Mortensen Eric R.
14 Aug 2019
Chief Medical Officer
Exercised, kept
5,000
$4.50
$22.50K
BLOCH KATHLEEN P.
9 Aug 2019
Chief Financial Officer
Buy indirect
1,500
$5.52
$8.27K
Chan Phillip P.
7 Jun 2019
President and CEO
Exercised, kept
20,000
$4.33
$86.50K
BLOCH KATHLEEN P.
7 Jun 2019
Chief Financial Officer
Exercised, kept
10,000
$5.60
$56.00K
BLOCH KATHLEEN P.
10 May 2019
Chief Financial Officer
Buy indirect
3,000
$6.49
$19.48K
Chan Phillip P.
7 Dec 2018
President and CEO
Sold after exercise
24,337
$9.37
$228.03K
Chan Phillip P.
7 Sep 2018
President and CEO
Sold after exercise
2,731
$14.11
$38.53K
Chan Phillip P.
6 Sep 2018
President and CEO
Sold after exercise
2,900
$14.75
$42.78K
Chan Phillip P.
5 Sep 2018
President and CEO
Sold after exercise
5,187
$14.85
$77.03K
Chan Phillip P.
5 Sep 2018
President and CEO
Sold after exercise
600
$14.85
$8.91K
Kraus Al
30 Aug 2018
Director
Sold after exercise
26,000
$14.47
$376.28K
Capponi Vincent
29 Aug 2018
Chief Operating Officer
Sold after exercise
20,000
$14.00
$280.00K
BLOCH KATHLEEN P.
28 Aug 2018
Chief Financial Officer
Sold after exercise
10,000
$13.50
$135.00K
Capponi Vincent
28 Aug 2018
Chief Operating Officer
Sold after exercise
9,565
$13.00
$124.35K
Capponi Vincent
3 Aug 2018
Chief Operating Officer
Sold after exercise
7,600
$13.08
$99.41K
BLOCH KATHLEEN P.
3 Aug 2018
Chief Financial Officer
Sold after exercise
3,600
$12.15
$43.74K
BLOCH KATHLEEN P.
3 Aug 2018
Chief Financial Officer
Sold after exercise
6,200
$12.75
$79.05K
BLOCH KATHLEEN P.
3 Aug 2018
Chief Financial Officer
Sold after exercise
200
$12.85
$2.57K
Capponi Vincent
2 Aug 2018
Chief Operating Officer
Sold after exercise
2,835
$13.00
$36.86K
Capponi Vincent
15 Jun 2018
Chief Operating Officer
Sold after exercise
8,633
$12.00
$103.60K
Capponi Vincent
14 Jun 2018
Chief Operating Officer
Sold after exercise
11,367
$12.00
$136.40K
Chan Phillip P.
11 Jun 2018
President and CEO
Exercised, kept
8,000
$3.75
$30.00K
Capponi Vincent
17 May 2018
Chief Operating Officer
Sold after exercise
20,000
$10.00
$200.00K
Capponi Vincent
17 May 2018
Chief Operating Officer
Sold after exercise
8,000
$10.00
$80.00K
BLOCH KATHLEEN P.
16 May 2018
Chief Financial Officer
Sold after exercise
12,400
$9.00
$111.60K
Capponi Vincent
16 May 2018
Chief Operating Officer
Sold after exercise
4,846
$9.00
$43.61K
BLOCH KATHLEEN P.
15 May 2018
Chief Financial Officer
Sold after exercise
12,400
$8.75
$108.50K
Capponi Vincent
15 May 2018
Chief Operating Officer
Sold after exercise
3,154
$9.00
$28.39K
Capponi Vincent
15 May 2018
Chief Operating Officer
Sold after exercise
4,000
$9.00
$36.00K
BLOCH KATHLEEN P.
14 May 2018
Chief Financial Officer
Sold after exercise
10,000
$8.50
$85.00K
BLOCH KATHLEEN P.
17 Apr 2018
Chief Financial Officer
Sold after exercise
120
$8.25
$990.00
BLOCH KATHLEEN P.
15 Mar 2018
Chief Financial Officer
Sold after exercise
11,176
$8.25
$92.20K
BLOCH KATHLEEN P.
13 Mar 2018
Chief Financial Officer
Sold after exercise
1,104
$8.25
$9.11K
BLOCH KATHLEEN P.
21 Feb 2018
Chief Financial Officer
Sold after exercise
10,000
$8.00
$80.00K
Capponi Vincent
16 Jan 2018
Chief Operating Officer
Exercised, kept
44,000
$6.25
$275.00K
BLOCH KATHLEEN P.
12 Jan 2018
Chief Financial Officer
Sold after exercise
12,400
$7.75
$96.10K
BLOCH KATHLEEN P.
8 Jan 2018
Chief Financial Officer
Sold after exercise
10,000
$7.50
$75.00K
BLOCH KATHLEEN P.
8 Jan 2018
Chief Financial Officer
Sold after exercise
12,400
$7.25
$89.90K
BLOCH KATHLEEN P.
8 Jan 2018
Chief Financial Officer
Sold after exercise
10,000
$7.15
$71.50K
Capponi Vincent
27 Nov 2017
Chief Operating Officer
Sold after exercise
4,000
$7.00
$28.00K
BATOR MICHAEL G.
9 Jun 2017
Director
Buy
1,500
$4.12
$6.18K
Mortensen Eric R.
9 Jun 2017
Chief Medical Officer
Buy
2,500
$4.04
$10.10K
Jones Edward Raymond
8 Jun 2017
Director
Buy
2,000
$4.00
$8.00K
Jones Edward Raymond
8 Jun 2017
Director
Buy
500
$3.98
$1.99K
Chan Phillip P.
8 Jun 2017
President and CEO
Buy
3,700
$4.00
$14.80K
Capponi Vincent
8 Jun 2017
Chief Operating Officer
Buy
2,500
$4.00
$10.00K
Chan Phillip P.
5 Jun 2017
President and CEO
Buy
6,300
$4.00
$25.20K
BLOCH KATHLEEN P.
15 May 2017
Chief Financial Officer
Buy indirect
1,000
$4.34
$4.34K
Chan Phillip P.
9 Dec 2016
President and CEO
Buy
4,600
$5.40
$24.84K
BLOCH KATHLEEN P.
6 Dec 2016
Chief Financial Officer
Buy indirect
1,000
$4.83
$4.83K

What was left out

Form 4 filings counted 201
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 37
Sales at will 0
Transactions with no price 0
Shares from compensation/vesting 3,890,418
History held since 7 Dec 2016