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United States Healthcare Equipment & Supplies

Cytosorbents Corp (CTSO)

Track

In the last 90 days, Cytosorbents Corp. saw insider buying totaling $104,897.59, with executives accounting for the entire net buy. Two executives were net buyers. This activity occurred against a backdrop of a 33.5% stock price decrease over the same period. The last earnings report missed expectations by 60%.
Stock chart
Ticker: CTSO Exchange: NAS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
MARIANI PETER J
Chief Financial Officer
1 purchase — total 100,000 USD
Buy 15 Jun 2026
Value US$2,280,635.09 | Price 318.32 | Shares 40,489
Buy 15 Jun 2026
Value US$2,285,649.25 | Price 484.35 | Shares 61,517
Buy 12 Jun 2026
Value US$100,000.00 | Price 0.40 | Shares 1,000
Proposed sale 19 Aug 2025
Value US$11,447.74 | Price 1.09 | Shares 10,548
Buy 13 Dec 2024
Value US$19,294.00 | Price 0.96 | Shares 20,000
Buy 12 Dec 2024
Value US$17,872.00 | Price 0.89 | Shares 20,000
Buy 11 Dec 2024
Value US$10,102.84 | Price 0.89 | Shares 11,363
Buy 13 Dec 2023
Value US$30,000.81 | Price 1.33 | Shares 22,557
Buy 13 Dec 2023
Value US$50,000.02 | Price 1.33 | Shares 37,594
Buy 13 Dec 2023
Value US$25,000.01 | Price 1.33 | Shares 18,797
Buy 13 Dec 2023
Value US$30,000.81 | Price 1.33 | Shares 22,557
Buy 13 Dec 2023
Value US$50,000.02 | Price 1.33 | Shares 37,594
Buy 13 Dec 2023
Value US$10,000.27 | Price 1.33 | Shares 7,519
Buy 13 Dec 2023
Value US$100,000.04 | Price 1.33 | Shares 75,188
Buy 13 Dec 2023
Value US$10,000.27 | Price 1.33 | Shares 7,519
Buy 7 Aug 2023
Value US$3,150.00 | Price 3.15 | Shares 1,000
Buy 7 Aug 2023
Value US$3,200.00 | Price 3.20 | Shares 1,000
Buy 4 Aug 2023
Value US$3,230.00 | Price 3.23 | Shares 1,000
Buy 25 May 2023
Value US$3,132.91 | Price 2.85 | Shares 1,100
Buy 25 May 2023
Value US$3,123.34 | Price 2.84 | Shares 1,100
Buy 25 May 2023
Value US$3,133.13 | Price 2.85 | Shares 1,100
Buy 10 May 2023
Value US$9,509.70 | Price 3.17 | Shares 3,000
Buy 10 May 2023
Value US$6,250.00 | Price 3.13 | Shares 2,000
Buy 10 May 2023
Value US$15,298.00 | Price 3.06 | Shares 5,000
Buy 8 Dec 2022
Value US$7,382.34 | Price 1.26 | Shares 5,859
Buy 7 Dec 2022
Value US$12,411.00 | Price 1.26 | Shares 9,850
Buy 6 Dec 2022
Value US$18,063.82 | Price 1.26 | Shares 14,291
Buy 8 Sep 2022
Value US$59,500.00 | Price 1.70 | Shares 35,000
Planned buy 25 Aug 2022
Value US$1,910.00 | Price 1.91 | Shares 1,000
Planned buy 21 Jun 2022
Value US$3,600.00 | Price 1.80 | Shares 2,000
Planned buy 16 Jun 2022
Value US$6,000.00 | Price 2.00 | Shares 3,000
Planned buy 16 Jun 2022
Value US$4,108.85 | Price 1.85 | Shares 2,221
Buy 9 Jun 2022
Value US$34,784.00 | Price 2.17 | Shares 16,000
Buy 6 Jun 2022
Value US$16,529.13 | Price 1.90 | Shares 8,700
Buy 23 May 2022
Value US$6,347.81 | Price 2.03 | Shares 3,127
Buy 23 May 2022
Value US$605.48 | Price 2.03 | Shares 299
Buy 23 May 2022
Value US$3,210.96 | Price 2.04 | Shares 1,574
Buy 18 May 2022
Value US$2,210.00 | Price 2.21 | Shares 1,000
Buy 18 May 2022
Value US$4,400.00 | Price 2.20 | Shares 2,000
Buy 18 May 2022
Value US$4,400.00 | Price 2.20 | Shares 2,000
Buy 18 May 2022
Value US$4,400.00 | Price 2.20 | Shares 2,000
Buy 18 May 2022
Value US$4,360.00 | Price 2.18 | Shares 2,000
Buy 18 May 2022
Value US$4,360.00 | Price 2.18 | Shares 2,000
Buy 16 May 2022
Value US$3,748.54 | Price 2.24 | Shares 1,676
Buy 11 May 2022
Value US$17,776.00 | Price 2.02 | Shares 8,800
Buy 11 May 2022
Value US$2,398.80 | Price 2.00 | Shares 1,200
Buy 6 May 2022
Value US$9,795.00 | Price 1.96 | Shares 5,000
Planned buy 30 Dec 2021
Value US$22,121.10 | Price 4.05 | Shares 5,462
Planned buy 29 Dec 2021
Value US$38,223.90 | Price 4.05 | Shares 9,438
Planned buy 29 Dec 2021
Value US$404.00 | Price 4.04 | Shares 100
Buy 10 Dec 2021
Value US$26,250.00 | Price 5.25 | Shares 5,000
Buy 23 Nov 2021
Value US$19,920.00 | Price 4.98 | Shares 4,000
Sale 10 Nov 2020
Value US$64,000.00 | Price 8.00 | Shares 8,000
Planned sale 27 Apr 2020
Value US$100,000.00 | Price 10.00 | Shares 10,000
Planned sale 10 Mar 2020
Value US$28,062.00 | Price 6.00 | Shares 4,677
Buy 10 Dec 2019
Value US$11,029.50 | Price 3.68 | Shares 3,000
Buy 6 Dec 2019
Value US$59,400.00 | Price 3.60 | Shares 16,500
Buy 26 Nov 2019
Value US$4,270.20 | Price 4.27 | Shares 1,000
Buy 16 Aug 2019
Value US$31,395.00 | Price 4.83 | Shares 6,500
Buy 9 Aug 2019
Value US$8,273.40 | Price 5.52 | Shares 1,500
Buy 10 May 2019
Value US$19,476.30 | Price 6.49 | Shares 3,000
Sale 7 Dec 2018
Value US$228,025.52 | Price 9.37 | Shares 24,337
Sale 7 Sep 2018
Value US$38,534.41 | Price 14.11 | Shares 2,731
Sale 6 Sep 2018
Value US$42,775.00 | Price 14.75 | Shares 2,900
Sale 5 Sep 2018
Value US$77,026.95 | Price 14.85 | Shares 5,187
Sale 5 Sep 2018
Value US$8,910.00 | Price 14.85 | Shares 600
Sale 30 Aug 2018
Value US$376,282.40 | Price 14.47 | Shares 26,000
Planned sale 29 Aug 2018
Value US$280,000.00 | Price 14.00 | Shares 20,000
Planned sale 28 Aug 2018
Value US$135,000.00 | Price 13.50 | Shares 10,000
Planned sale 28 Aug 2018
Value US$124,345.00 | Price 13.00 | Shares 9,565
Planned sale 3 Aug 2018
Value US$43,743.60 | Price 12.15 | Shares 3,600
Planned sale 3 Aug 2018
Value US$79,050.00 | Price 12.75 | Shares 6,200
Planned sale 3 Aug 2018
Value US$2,570.00 | Price 12.85 | Shares 200
Planned sale 3 Aug 2018
Value US$99,408.00 | Price 13.08 | Shares 7,600
Planned sale 2 Aug 2018
Value US$36,855.00 | Price 13.00 | Shares 2,835
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-16 2026-06-15 B Purchase
2.3
MARIANI PETER J

Chief Financial Officer

Officer
40,489 -12.3%
318.32
US$2,280,635 		40,489 -12.3% 318.32 US$2,280,635
2026-06-15 2026-06-15 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
61,517 -11.4%
484.35
US$2,285,649 		61,517 -11.4% 484.35 US$2,285,649
2026-06-15 2026-06-12 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
74,415 -49.5%
65.86
US$2,654,940 		74,415 -49.5% 65.86 US$2,654,940
2025-08-19 2025-08-19 PrS Proposed sale
2.3
MARIANI PETER J

Officer

Officer
10,548
1.09
US$11,448 		10,548 1.09 US$11,448
2024-12-16 2024-12-13 B Purchase
2.3
MARIANI PETER J

Chief Financial Officer

Officer
20,000 +5.2%
0.96
US$19,294 		20,000 +5.2% 0.96 US$19,294
2024-12-13 2024-12-12 B Purchase
2.3
MARIANI PETER J

Chief Financial Officer

Officer
20,000 +5.5%
0.89
US$17,872 		20,000 +5.5% 0.89 US$17,872
2024-12-13 2024-12-11 B Purchase
2.3
MARIANI PETER J

Chief Financial Officer

Officer
11,363 +3.2%
0.89
US$10,103 		11,363 +3.2% 0.89 US$10,103
2023-12-15 2023-12-13 B Purchase
1.3
Sobel Alan D.
Non-Executive Director
22,557 +28.4%
1.33
US$30,001 		22,557 +28.4% 1.33 US$30,001
2023-12-15 2023-12-13 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
37,594 +42.8%
1.33
US$50,000 		37,594 +42.8% 1.33 US$50,000
2023-12-15 2023-12-13 B Purchase
1.3
Capponi Vincent

President & COO

Officer
18,797 +3.3%
1.33
US$25,000 		18,797 +3.3% 1.33 US$25,000
2023-12-15 2023-12-13 B Purchase
0.6
Deliargyris Efthymios

Chief Medical Officer

Officer
22,557 +6.9%
1.33
US$30,001 		22,557 +6.9% 1.33 US$30,001
2023-12-15 2023-12-13 B Purchase
1.9
BLOCH KATHLEEN P.

Chief Financial Officer

Officer
37,594 +8.7%
1.33
US$50,000 		37,594 +8.7% 1.33 US$50,000
2023-12-15 2023-12-13 B Purchase
0.6
Kim Jiny
Non-Executive Director
7,519 +10.7%
1.33
US$10,000 		7,519 +10.7% 1.33 US$10,000
2023-12-15 2023-12-13 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
75,188 +7.6%
1.33
US$100,000 		75,188 +7.6% 1.33 US$100,000
2023-12-15 2023-12-13 B Purchase
1.2
Jones Edward Raymond
Non-Executive Director
7,519 +9.2%
1.33
US$10,000 		7,519 +9.2% 1.33 US$10,000
2023-08-08 2023-08-07 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
1,000 +1.2%
3.15
US$3,150 		1,000 +1.2% 3.15 US$3,150
2023-08-08 2023-08-07 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
1,000 +1.2%
3.20
US$3,200 		1,000 +1.2% 3.20 US$3,200
2023-08-08 2023-08-04 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
1,000 +1.2%
3.23
US$3,230 		1,000 +1.2% 3.23 US$3,230
2023-05-30 2023-05-25 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
1,100 +2.4%
2.85
US$3,133 		1,100 +2.4% 2.85 US$3,133
2023-05-30 2023-05-25 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
1,100 +2.5%
2.84
US$3,123 		1,100 +2.5% 2.84 US$3,123
2023-05-30 2023-05-25 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
1,100 +2.5%
2.85
US$3,133 		1,100 +2.5% 2.85 US$3,133
2023-05-12 2023-05-10 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
3,000 +7.4%
3.17
US$9,510 		3,000 +7.4% 3.17 US$9,510
2023-05-12 2023-05-10 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
2,000 +5.2%
3.13
US$6,250 		2,000 +5.2% 3.13 US$6,250
2023-05-12 2023-05-10 B Purchase
1.9
BLOCH KATHLEEN P.

Interim CFO

Officer
5,000 +14.8%
3.06
US$15,298 		5,000 +14.8% 3.06 US$15,298
2022-12-09 2022-12-08 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
5,859 +0.7%
1.26
US$7,382 		5,859 +0.7% 1.26 US$7,382
2022-12-08 2022-12-07 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
9,850 +1.1%
1.26
US$12,411 		9,850 +1.1% 1.26 US$12,411
2022-12-08 2022-12-06 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
14,291 +1.6%
1.26
US$18,064 		14,291 +1.6% 1.26 US$18,064
2022-09-12 2022-09-08 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
35,000 +4.2%
1.70
US$59,500 		35,000 +4.2% 1.70 US$59,500
2022-08-26 2022-08-25 PP Planned purchase
0.6
Kim Jiny
Non-Executive Director
1,000 +1.4%
1.91
US$1,910 		1,000 +1.4% 1.91 US$1,910
2022-06-22 2022-06-21 PP Planned purchase
1.3
Capponi Vincent

President and COO

Officer
2,000 +0.5%
1.80
US$3,600 		2,000 +0.5% 1.80 US$3,600
2022-06-21 2022-06-16 PP Planned purchase
1.3
Capponi Vincent

See Remarks

Officer
3,000 +0.7%
2.00
US$6,000 		3,000 +0.7% 2.00 US$6,000
2022-06-21 2022-06-16 PP Planned purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
2,221 +0.3%
1.85
US$4,109 		2,221 +0.3% 1.85 US$4,109
2022-06-10 2022-06-09 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Executive Director
16,000 +2.1%
2.17
US$34,784 		16,000 +2.1% 2.17 US$34,784
2022-06-06 2022-06-06 B Purchase
1.9
BLOCH KATHLEEN P.

Chief Financial Officer

Officer
8,700 +34.8%
1.90
US$16,529 		8,700 +34.8% 1.90 US$16,529
2022-05-25 2022-05-23 B Purchase
1.3
Capponi Vincent

President and COO

Officer
3,127 +0.7%
2.03
US$6,348 		3,127 +0.7% 2.03 US$6,348
2022-05-25 2022-05-23 B Purchase
1.3
Capponi Vincent

President and COO

Officer
299 +0.1%
2.03
US$605 		299 +0.1% 2.03 US$605
2022-05-25 2022-05-23 B Purchase
1.3
Capponi Vincent

President and COO

Officer
1,574 +0.4%
2.04
US$3,211 		1,574 +0.4% 2.04 US$3,211
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
1,000 +1.2%
2.21
US$2,210 		1,000 +1.2% 2.21 US$2,210
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
2,000 +2.4%
2.20
US$4,400 		2,000 +2.4% 2.20 US$4,400
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
2,000 +2.5%
2.20
US$4,400 		2,000 +2.5% 2.20 US$4,400
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
2,000 +2.6%
2.20
US$4,400 		2,000 +2.6% 2.20 US$4,400
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
2,000 +2.6%
2.18
US$4,360 		2,000 +2.6% 2.18 US$4,360
2022-05-19 2022-05-18 B Purchase
1.4
BATOR MICHAEL G.
Non-Executive Director
2,000 +2.7%
2.18
US$4,360 		2,000 +2.7% 2.18 US$4,360
2022-05-17 2022-05-16 B Purchase
1.2
Jones Edward Raymond
Non-Executive Director
1,676 +2.1%
2.24
US$3,749 		1,676 +2.1% 2.24 US$3,749
2022-05-12 2022-05-11 B Purchase
1.3
Sobel Alan D.
Non-Executive Director
8,800 +12.5%
2.02
US$17,776 		8,800 +12.5% 2.02 US$17,776
2022-05-12 2022-05-11 B Purchase
1.3
Sobel Alan D.
Non-Executive Director
1,200 +1.7%
2.00
US$2,399 		1,200 +1.7% 2.00 US$2,399
2022-05-09 2022-05-06 B Purchase
1.4
Kraus Al
Non-Executive Director
5,000 +4.0%
1.96
US$9,795 		5,000 +4.0% 1.96 US$9,795
2022-01-03 2021-12-30 PP Planned purchase
2.7
Chan Phillip P.

Chief Executive Officer

Officer
5,462 +0.7%
4.05
US$22,121 		5,462 +0.7% 4.05 US$22,121
2022-01-03 2021-12-29 PP Planned purchase
2.7
Chan Phillip P.

Chief Executive Officer

Officer
9,438 +1.3%
4.05
US$38,224 		9,438 +1.3% 4.05 US$38,224
2022-01-03 2021-12-29 PP Planned purchase
2.7
Chan Phillip P.

Chief Executive Officer

Officer
100 +0.0%
4.04
US$404 		100 +0.0% 4.04 US$404
2021-12-13 2021-12-10 B Purchase
2.7
Chan Phillip P.

Chief Executive Officer

Officer
5,000 +0.7%
5.25
US$26,250 		5,000 +0.7% 5.25 US$26,250
2021-11-26 2021-11-23 B Purchase
1.9
BLOCH KATHLEEN P.

Chief Financial Officer

Officer
4,000 +19.0%
4.98
US$19,920 		4,000 +19.0% 4.98 US$19,920
2020-11-12 2020-11-10 S Sale
1.4
Kraus Al
Non-Executive Director
8,000 -6.0%
8.00
US$64,000 		8,000 -6.0% 8.00 US$64,000
2020-04-29 2020-04-27 PlS Planned sale
1.3
Capponi Vincent

Chief Operating Officer

Officer
10,000 -2.3%
10.00
US$100,000 		10,000 -2.3% 10.00 US$100,000
2020-03-12 2020-03-10 PlS Planned sale
1.3
Capponi Vincent

Chief Operating Officer

Officer
4,677 -1.1%
6.00
US$28,062 		4,677 -1.1% 6.00 US$28,062
2019-12-10 2019-12-10 B Purchase BLOCH KATHLEEN P.

Chief Financial Officer

Officer
3,000 +1.0%
3.68
US$11,030 		3,000 +1.0% 3.68 US$11,030
2019-12-06 2019-12-06 B Purchase Chan Phillip P.

President and CEO

Executive Director
16,500 +2.6%
3.60
US$59,400 		16,500 +2.6% 3.60 US$59,400
2019-11-26 2019-11-26 B Purchase BLOCH KATHLEEN P.

Chief Financial Officer

Officer
1,000 +5.0%
4.27
US$4,270 		1,000 +5.0% 4.27 US$4,270
2019-08-16 2019-08-16 B Purchase BLOCH KATHLEEN P.

Chief Financial Officer

Officer
6,500 +48.1%
4.83
US$31,395 		6,500 +48.1% 4.83 US$31,395
2019-08-13 2019-08-09 B Purchase BLOCH KATHLEEN P.

Chief Financial Officer

Officer
1,500 +12.5%
5.52
US$8,273 		1,500 +12.5% 5.52 US$8,273
2019-05-14 2019-05-10 B Purchase
1.9
BLOCH KATHLEEN P.

Chief Financial Officer

Officer
3,000 +inf%
6.49
US$19,476 		3,000 +inf% 6.49 US$19,476
2018-12-11 2018-12-07 S Sale Chan Phillip P.

President and CEO

Executive Director
24,337 -4.6%
9.37
US$228,026 		24,337 -4.6% 9.37 US$228,026
2018-09-07 2018-09-07 S Sale Chan Phillip P.

President and CEO

Executive Director
2,731 -0.6%
14.11
US$38,534 		2,731 -0.6% 14.11 US$38,534
2018-09-07 2018-09-06 S Sale Chan Phillip P.

President and CEO

Executive Director
2,900 -0.7%
14.75
US$42,775 		2,900 -0.7% 14.75 US$42,775
2018-09-07 2018-09-05 S Sale Chan Phillip P.

President and CEO

Executive Director
5,187 -1.2%
14.85
US$77,027 		5,187 -1.2% 14.85 US$77,027
2018-09-07 2018-09-05 S Sale Chan Phillip P.

President and CEO

Executive Director
600 -0.1%
14.85
US$8,910 		600 -0.1% 14.85 US$8,910
2018-08-31 2018-08-30 S Sale Kraus Al Non-Executive Director
26,000 -17.2%
14.47
US$376,282 		26,000 -17.2% 14.47 US$376,282
2018-08-31 2018-08-29 PlS Planned sale Capponi Vincent

Chief Operating Officer

Officer
20,000 -5.7%
14.00
US$280,000 		20,000 -5.7% 14.00 US$280,000
2018-08-30 2018-08-28 PlS Planned sale BLOCH KATHLEEN P.

Chief Financial Officer

Officer
10,000 -3.8%
13.50
US$135,000 		10,000 -3.8% 13.50 US$135,000
2018-08-30 2018-08-28 PlS Planned sale Capponi Vincent

Chief Operating Officer

Officer
9,565 -2.8%
13.00
US$124,345 		9,565 -2.8% 13.00 US$124,345
2018-08-07 2018-08-03 PlS Planned sale BLOCH KATHLEEN P.

Chief Financial Officer

Officer
3,600 -1.4%
12.15
US$43,744 		3,600 -1.4% 12.15 US$43,744
2018-08-07 2018-08-03 PlS Planned sale BLOCH KATHLEEN P.

Chief Financial Officer

Officer
6,200 -2.4%
12.75
US$79,050 		6,200 -2.4% 12.75 US$79,050
2018-08-07 2018-08-03 PlS Planned sale BLOCH KATHLEEN P.

Chief Financial Officer

Officer
200 -0.1%
12.85
US$2,570 		200 -0.1% 12.85 US$2,570
2018-08-06 2018-08-03 PlS Planned sale Capponi Vincent

Chief Operating Officer

Officer
7,600 -2.2%
13.08
US$99,408 		7,600 -2.2% 13.08 US$99,408
2018-08-06 2018-08-02 PlS Planned sale Capponi Vincent

Chief Operating Officer

Officer
2,835 -0.8%
13.00
US$36,855 		2,835 -0.8% 13.00 US$36,855
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