CNS PHARMACEUTICALS INC CNSP
COM · Common Stock · CUSIP 18978H508
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersHouston, TX
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 1.5m as of 2026-08-11, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $4.78.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q2 2025 | 1 |
| Q3 2025 | 8 |
| Q4 2025 | 9 |
| Q1 2026 | 11 |
| Q2 2026 | 11 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2025 | 8 | 1 |
| Q4 2025 | 4 | 3 |
| Q1 2026 | 6 | 2 |
| Q2 2026 | 6 | 6 |
Biggest buyers
| Ikarian Capital, LLC | Added | +90.0k |
| ADAR1 Capital Management, LLC | New | +70.0k |
| VANGUARD FIDUCIARY TRUST CO | New | +10.2k |
| VANGUARD CAPITAL MANAGEMENT LLC | New | +7.0k |
| UBS Group AG | Added | +732 |
| BARCLAYS PLC | New | +19 |
Biggest sellers
| GEODE CAPITAL MANAGEMENT, LLC | Sold out | -23.2k |
| Stonepine Capital Management, LLC | Reduced | -19.4k |
| Tower Research Capital LLC (TRC) | Reduced | -511 |
| MAI Capital Management | Sold out | -3 |
| CITIGROUP INC | Sold out | -1 |
| Caitong International Asset Management Co., Ltd | Sold out | -1 |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| Ikarian Capital, LLC 13G · institution +4.2 pts · filed 2026-08-14 | 9.9% |
| Stonepine Capital Management, LLC 13G · passive investor +2.0 pts · filed 2026-05-15 | 9.9% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 0 | — | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 2 | $44.0k | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-05-18 | Charles Faith L. Director | Bought | $34.0k7.1k shares |
| 2026-05-18 | Fisher Michal Director | Bought | $10.0k2.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Ikarian Capital, LLC 0.11% of their portfolio | 135.8k $649.3k | Added +90.0k |
| ADAR1 Capital Management, LLC 0.02% of their portfolio | 70.0k $334.6k | New |
| Stonepine Capital Management, LLC 0.15% of their portfolio | 41.6k $198.7k | Reduced -19.4k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.00% of their portfolio | 13.5k $64.6k | Unchanged |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 10.2k $48.9k | New |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 7.0k $33.4k | New |
| UBS Group AG 0.00% of their portfolio | 1.5k $7.0k | Added +732 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 799 $3.8k | Reduced -511 |
| BARCLAYS PLC 0.00% of their portfolio | 19 $91 | New |
| BARRETT & COMPANY, INC. 0.00% of their portfolio | 8 $38 | Unchanged |
| DANSKE BANK A/S 0.00% of their portfolio | 1 $5 | Unchanged |