Cytosorbents Corporation (CTSO)
Nasdaq: CTSO · Surgical & Medical Instruments & Apparatus · Princeton, NJ · filing with the SEC since 2004
Who owns Cytosorbents Corporation
As filed with the SECHolders of 5% or more
3
Avenir Corp holds 8.3% of Common Stock, as its SCHEDULE 13G/A filed Feb 13, 2026 says.
Directors and officers
8
report now, of 13 people on the record since 2006. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Avenir Corp
SCHEDULE 13G/A · filed Feb 13, 2026 · Common Stock · 5.7% in Feb 14, 2025
Thomas A. Satterfield, Jr.
SCHEDULE 13G · filed Jan 17, 2025 · Common Stock, par value $0.001 per share
Avenue Capital Management II, L.P.
SCHEDULE 13G · filed May 28, 2025 · Common Stock, par value $0.001 per share
Skylands Capital, LLC
SCHEDULE 13G · filed Apr 17, 2025 · Common Stock · reported falling below 5%, from 5.1% in Jan 7, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Apr 30, 2025 · Common Stock · reported falling below 5%, from 7.13% in Jan 31, 2025
What CTSO reports owning in othersstakes of 5% or more, and other ties
8 subsidiaries in 6 countries, from the list filed with the 10-K filed Mar 30, 2026.
Insider tradesForm 4
0sales
10purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$300,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window4 of 14 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Chan Phillip P. | Chief Executive Officer | 0 | $0 | 0 | 4 | $200,000 |
| Sobel Alan D. | director | 0 | $0 | 0 | 3 | $0 |
| Capponi Vincent | President and COO | 0 | $0 | 0 | 2 | $0 |
| Mariani Peter J | Chief Financial Officer | 0 | $0 | 0 | 1 | $0 |