Welcome to our dedicated page for Cytosorbents SEC filings (Ticker: CTSO), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The CytoSorbents Corporation (NASDAQ: CTSO) SEC filings page on Stock Titan provides direct access to the company’s regulatory disclosures filed with the U.S. Securities and Exchange Commission. These documents include Form 8‑K current reports, which CytoSorbents uses to announce material events such as quarterly financial results, regulatory updates for its DrugSorb™-ATR investigational device, and developments in its interactions with the U.S. Food and Drug Administration and Health Canada.
Through these filings, investors can review how CytoSorbents reports on revenue performance, gross margin trends, credit agreement amendments, and workforce and cost reduction programs, as well as the status of its De Novo applications and appeal processes for DrugSorb‑ATR. The 8‑K reports also confirm key listing information, including that the company’s common stock trades on the Nasdaq Capital Market under the CTSO ticker.
On Stock Titan, each new CytoSorbents filing is captured from EDGAR and presented with AI-powered summaries that explain the main points in clear language. This helps readers quickly understand the significance of items such as regulatory decisions, financing arrangements, or other corporate actions without having to parse every line of the original document.
Users can explore historical filings to follow the evolution of CytoSorbents’ regulatory strategy for its blood purification products, including CytoSorb® and DrugSorb‑ATR, and to see how the company communicates material information to the market over time. The page is designed to make it easier to track CTSO’s official disclosures, from earnings‑related 8‑Ks to other event‑driven reports, with AI insights that highlight what matters most to investors and analysts.
Avenir Corporation and James H. Rooney report significant ownership in Cytosorbents Corp. They disclose beneficial ownership of 5,230,099 shares of Cytosorbents common stock, representing about 8.3% of the outstanding class.
The filing states they share voting and dispositive power over these shares. Avenir is described as a Virginia-based investment adviser, and Rooney is its portfolio manager and shareholder. They certify the position was acquired and is held in the ordinary course of business and not for the purpose of changing or influencing control of Cytosorbents.
Cytosorbents Corp (CTSO) reported that its Chief Executive Officer and director, Phillip P. Chan, acquired additional company stock in an open market transaction. On 11/18/2025, he purchased 100,000 shares of Common Stock at a price of $0.64 per share. Following this transaction, he beneficially owns 1,482,963 shares, reflecting both directly owned shares and various restricted stock units (RSUs).
The footnotes explain that his holdings include multiple RSU grants that either vest upon a "Change In Control" under the company’s 2014 Long-Term Incentive Plan or in equal parts on the first and second anniversaries of their grant dates, subject to continued service. His position also includes 1,113,363 shares of Common Stock owned outright.
CytoSorbents Corporation announced that it issued a press release with financial results for the quarter ended September 30, 2025. The press release is furnished as Exhibit 99.1 under Item 2.02.
The company states this information is furnished, not filed, and is not subject to Section 18 of the Exchange Act, nor incorporated by reference into other filings except as specifically stated.
CytoSorbents Corporation furnished a current report stating that it issued a press release providing a regulatory update on its -ATR program. The press release is attached as Exhibit 99.1 and is treated as furnished, not filed, under securities law.
CytoSorbents Corporation filed a current report describing a regulatory update for its DrugSorbTM-ATR device. The company states that it issued a press release announcing the outcome of its appeal to the U.S. Food and Drug Administration regarding the FDA’s earlier denial of its De Novo Market Authorization request for DrugSorb-ATR.
The press release with details of the appeal outcome is furnished as Exhibit 99.1 to the report, rather than being summarized in the body of the filing. This filing mainly serves to formally notify investors that the FDA appeal outcome and related information are now available through that exhibit.
Cytosorbents Corp. (CTSO) filed a Form 144 reporting a proposed sale of 10,548 common shares through Fidelity Brokerage Services with an approximate sale date of 08/19/2025. The filing shows the shares were acquired on 08/14/2025 by restricted stock vesting from the issuer as compensation. The aggregate market value of the planned sale is listed as $11,447.74 and the company reports 62,761,805 shares outstanding. No other sales in the past three months are reported.
Phillip P. Chan, Chief Executive Officer and director of Cytosorbents Corp (CTSO), reported equity awards and holdings on 08/08/2025. The filing shows an acquisition of 105,600 restricted stock units (RSUs) with a reported price of $0 and a grant of 136,400 stock options with a $1 exercise price and an expiration date of 08/08/2035. Following the reported transactions, the filing reports 1,382,963 shares of common stock beneficially owned. Footnotes disclose multiple prior RSU grants (2015–2024), including 48,000 unvested RSUs from April 2, 2024, and state that 1,013,363 shares are owned outright by the reporting person. The RSUs and options vest in scheduled tranches and vesting generally requires continued service.
CytoSorbents director Edward R. Jones reported a change in beneficial ownership showing a disposition of 88,834 shares of Common Stock on 08/08/2025. The filing states that the 88,834 shares comprise 69,300 Restricted Stock Units (grants from 2015, 2016, 2017 and 2018 that vest on a defined "Change In Control") and 19,534 shares owned outright by the reporting person. The filing also shows an acquisition of 22,000 stock options granted under the company plan with a $1 exercise price; those options vest in four equal quarterly installments over one year following grant and appear to expire on 08/08/2035. The Form 4 was submitted as a single reporting person filing and includes a Power of Attorney exhibit.
Michael G. Bator, a director of Cytosorbents Corporation (CTSO), reported a transaction dated 08/08/2025 in which he disposed of 151,273 shares of common stock and was granted stock options to purchase 44,000 shares at an exercise price of $1. The 151,273 shares reported include 3,300 RSUs (granted 03/15/2018), 6,000 RSUs (02/24/2017), 60,000 RSUs (06/07/2016) that vest upon a Change of Control, and 81,973 shares owned outright by the reporting person. The options were granted under the CytoSorbents 2014 Long-Term Incentive Plan and vest in four equal quarterly installments over one year, subject to continued service, with an expiration indicated as 08/08/2035.
Peter J. Mariani, Chief Financial Officer of Cytosorbents Corp. (CTSO), reported insider awards and holdings dated 08/08/2025. The filing shows an acquisition of 71,500 shares of Common Stock represented by restricted stock units (RSUs) at a reported price of $0. The report also discloses a grant of 90,000 stock options with an exercise/conversion price of $1 and an expiration reference of 08/08/2035. Option vesting is described in the filing.
The filing lists total common stock beneficially owned following the reported transaction as 538,113 shares and details additional RSU awards: 110,000, 65,000, and 175,000 subject to various vesting conditions, plus 116,613 shares owned by the reporting person. Vesting schedules for the RSUs and the options are specified in the footnotes.