CNS Pharmaceuticals
CNSP on Nasdaq. Market value $8m.
Should I look at this?
Look carefully before going further
Why it could be worth it
Nothing stands out yet.
What to watch out for
Read the warning sign in its own filings
This is not advice.
Who owns it
None of the long-term investors we follow own it. 11 funds in all.
Largest holders overall
- Ikarian Capital$649,267Added
- ADAR1 Capital Management$334,600New
- Stonepine Capital Management$198,719Cut
- Boothbay Fund Management$64,645
- Vanguard Fiduciary Trust$48,880New
- Vanguard Capital Management$33,427New
- UBS Group AG$6,983Added
- Tower Research Capital LLC (TRC)$3,819Cut
- Barclays$91New
- Barrett & Company$38
From 13F filings for the quarter ended 30 June 2026.
Big holders and activists
3 investors own more than 5%.
- Ikarian Capital, LLCPassive investorat least 9.9%+4.2 pts(filed with 1 related holder)Since 30 June 2026
- Stonepine Capital Management, LLCPassive investorat least 9.9%+2.0 pts(filed with 3 related holders)Since 31 March 2026
- Armistice Capital, LLCPassive investorat least 5.0%−5.0 pts(filed with 1 related holder)Since 30 September 2025
| Holder | Stake | Since | |
|---|---|---|---|
Ikarian Capital, LLC Passive investor | at least 9.9%+4.2 pts (filed with 1 related holder) | 30 June 2026 | |
Stonepine Capital Management, LLC Passive investor | at least 9.9%+2.0 pts (filed with 3 related holders) | 31 March 2026 | |
Armistice Capital, LLC Passive investor | at least 5.0%−5.0 pts (filed with 1 related holder) | 30 September 2025 |
From Schedule 13D and 13G filings: anyone owning more than 5% must file one.
What insiders did
In the last 12 months, 2 insiders bought $44,009 of shares on the open market.
- Fisher MichalDirectorBought
- Date
- 18 May 2026
- Shares
- 2,000
- Price
- $5.00
- Value
- $10,000
- Charles Faith L.DirectorBought
- Date
- 18 May 2026
- Shares
- 7,100
- Price
- $4.79
- Value
- $34,009
| Date | Who | Did | Shares | Price | Value |
|---|---|---|---|---|---|
| 18 May 2026 | Fisher Michal Director | Bought | 2,000 | $5.00 | $10,000 |
| 18 May 2026 | Charles Faith L. Director | Bought | 7,100 | $4.79 | $34,009 |
From Form 4 filings: insiders must report trades in their own company's shares within two days.
Warning signs in its filings
Problems the company itself reported to the SEC, in its own words.
1 serious warning sign in CNS Pharmaceuticals’ filings.
We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.
We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 31 Mar 2026, plus the 10-Q filed 12 Aug 2026 and 3 later 8-Ks.
Weak checks on its own accounts
SeriousThe company said its checks on its own accounts did not work at the end of its latest quarter. Mistakes could slip into the numbers.
“Based upon such evaluation, our chief executive officer and our chief financial officer have concluded that, as of June 30, 2026, our disclosure controls and procedures were, and continue to be, ineffective because of the material weaknesses in our internal control over financial reporting due to lack of segregation of duties (resulting from the limited number of personnel available), limited access to timely and complete information regarding the status of costs incurred in the activation of investigational sites and costs from treating patients in our study, which is a result of the use of a third-party Contract Research Organization (“CRO”) to manage the study, and the lack of formal documentation of our control environment.”
Show the full paragraph
Based upon such evaluation, our chief executive officer and our chief financial officer have concluded that, as of June 30, 2026, our disclosure controls and procedures were, and continue to be, ineffective because of the material weaknesses in our internal control over financial reporting due to lack of segregation of duties (resulting from the limited number of personnel available), limited access to timely and complete information regarding the status of costs incurred in the activation of investigational sites and costs from treating patients in our study, which is a result of the use of a third-party Contract Research Organization (“CRO”) to manage the study, and the lack of formal documentation of our control environment. Management is commencing actions to address the lack of formal documentation of our control environment, although this will not address the lack of segregation of duties. Management is also working with the CRO to improve the timeliness and completeness of the data reported to the Company to address this material weakness, as well as conducting increased analysis of such data to be performed by the Company.
From the 10-Q filed 12 August 2026, Part I, Item 4. Controls and Procedures. Read it in the filing
A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.
The deep dive
Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.
- What the business is worth, as a range, and the margin of safety at today’s price
- Prices to start buying, buy, and buy hard
- The three things that would make this a mistake
- Every number footnoted to the filing it came from
Your first deep dive is free.
Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.