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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•15 filings

CTSO

Cytosorbents Corp

Net purchases of $120.4K over the last 3 months

3 buyers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found 5 CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

+$120,435

3 buyers · 0 sellers

12-month purchases

$269,332

4 distinct insiders

12-month sales

$0.00

0 distinct insiders

Highlighted alerts

10

0 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

5 executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

23
Raw transactions
Everything returned by the filing
10
Voluntary view
P/S trades after deterministic checks
13
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
Code
A
Shares
100,000
Price
$0.64
Footnotes
4

The transaction reported on this Form 4 reflects an open market purchase made by the reporting person. Includes: (i) the following restricted stock units ("RSUs") that will be settled into shares of Common Stock upon vesting upon a "Change In Control" of the Company as defined in the Amended and Restated CytoSorbents Corporation 2014 Long-Term Incentive Plan (the "Plan"): (a) 10,300 RSUs granted on March 15, 2018, (b) 18,700 RSUs granted on February 24, 2017, (c) 57,000 RSUs granted on June 7, 2016 and (d) 130,000 RSUs granted on April 8, 2015; (continued from footnote 2) (iii) the following RSUs, which vest in equal parts on the first year anniversary of the date of grant and the second year anniversary of the date of grant, subject to the Reporting Person's continued service as of the applicable vesting date, and will settle into shares of Common Stock of the Company upon vesting: 96,000 RSUs granted on April 2, 2024 and of which 48,000 remain unvested as of the date hereof; (continued from footnote 3) (iv) 105,600 RSUs which shall vest in equal parts at the first and second year anniversaries of the date of grant, subject to the reporting person's continued service as of the applicable vesting date, and (v) 1,113,363 shares of Common Stock owned by the Reporting Person.

Raspberry interpretation
Informational — no alert

Reason: administrative_code.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

10 transactions

Chan Phillip P.

Chief Executive Officer

PurchaseAlert
Shares
3,774
Price
$6.00
Value
$22,644
Open SEC filing

Sobel Alan D.

Director

PurchaseAlert
Shares
100
Price
$6.01
Value
$601.00
Open SEC filing

Sobel Alan D.

Director

PurchaseAlert
Shares
500
Price
$6.05
Value
$3,025
Open SEC filing

Sobel Alan D.

Director

PurchaseAlert
Shares
1,900
Price
$6.12
Value
$11,628
Open SEC filing

Capponi Vincent

President and COO

PurchaseAlert
Shares
273
Price
$5.90
Value
$1,611
Open SEC filing

Capponi Vincent

President and COO

PurchaseAlert
Shares
1,800
Price
$6.07
Value
$10,926
Open SEC filing

Chan Phillip P.

Chief Executive Officer

PurchaseAlert
Shares
200,000
Price
$0.35
Value
$70,000
Open SEC filing

MARIANI PETER J

Chief Financial Officer

PurchaseAlert
Shares
100,000
Price
$0.44
Value
$44,000
Open SEC filing

Chan Phillip P.

Chief Executive Officer

PurchaseAlert
Shares
10,333
Price
$0.43
Value
$4,443
Open SEC filing

Chan Phillip P.

Chief Executive Officer

PurchaseAlert
Shares
251,136
Price
$0.40
Value
$100,454
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.