Rein Therapeutics, Inc. (RNTX) IPO - S-1 Filing, Stock & Insider Activity
Rein Therapeutics, Inc. IPO - Status & S-1 Filing
- Ticker: RNTX
- Status: Registered - S-1 filed with the SEC
- S-1 filed: 2026-04-28
- Exchange: NASDAQ
- Expected price range: not yet disclosed (set in a later S-1/A or pricing amendment)
- Shares offered: 30,000,000
- SEC CIK: 0001420565 · View the S-1 on SEC EDGAR →
Track every registration update on the InsiderAlpha IPO tracker.
Last SEC filing
Rein Therapeutics, Inc. (RNTX) has filed 2 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-05-29. Insiders disclosed 5 open-market purchases totaling $75K. 1 Form 8-K material event filing was reported by RNTX in the last 90 days. InsiderAlpha tracks every RNTX SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About Rein Therapeutics, Inc. (RNTX)
Rein Therapeutics, Inc. trades under the ticker RNTX. InsiderAlpha tracks 16 primary SEC Form 4 filings from 7 reporting insiders for RNTX since 2024, sourced directly from SEC EDGAR.
| Sector | Health Care insider trading |
|---|---|
| SIC classification | Pharmaceutical Preparations (SIC 2834) |
| SEC CIK | 0001420565 |
90-Day SEC Filing Activity
| Insider purchases (90d) | 5 ($75K) |
|---|---|
| Form 4 filings (90d) | 2 |
| Form 8-K filings (90d) | 1 |
| Latest Form 4 filing | 2026-05-29 |
Recent RNTX Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Rickenbach Josef H. von | Insider | P - Open-market purchase | 4.5K | $1.07 | $5K | SEC | |
| Rickenbach Josef H. von | Insider | P - Open-market purchase | 23.2K | $1.06 | $24K | SEC | |
| Rickenbach Josef H. von | Insider | P - Open-market purchase | 15.9K | $1.05 | $17K | SEC | |
| Rickenbach Josef H. von | Insider | P - Open-market purchase | 3.4K | $1.04 | $4K | SEC | |
| James Brian Windsor | President and Chief Executive Officer | P - Open-market purchase | 25.0K | $1.00 | $25K | SEC | |
| Voss Capital, LP | 10% Owner | P - Open-market purchase | 104.2K | $1.22 | $128K | SEC | |
| Voss Capital, LP | 10% Owner | P - Open-market purchase | 178.4K | $1.39 | $248K | SEC | |
| Voss Capital, LP | 10% Owner | P - Open-market purchase | 4.8K | $1.37 | $7K | SEC | |
| Voss Capital, LP | 10% Owner | P - Open-market purchase | 92.6K | $1.37 | $127K | SEC | |
| Voss Capital, LP | 10% Owner | P - Open-market purchase | 30.2K | $1.39 | $42K | SEC | |
| James Brian Windsor | President and CEO | P - Open-market purchase | 161 | $2.25 | $362 | SEC | |
| James Brian Windsor | President and CEO | P - Open-market purchase | 239 | $2.24 | $535 | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Rein Therapeutics, Inc. (RNTX). Updated in real time as new filings are submitted to the SEC.
Most-Active RNTX Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Rickenbach Josef H. von | 4 | $50K |
| James Brian Windsor | 2 | $25K |
Recent RNTX Form 8-K Material Events
- - Item 5.07 [SEC]
- - Item 1.01, 8.01, 9.01 [SEC]
- - Item 1.01, 2.03, 3.02, 9.01 · Financing · negative [SEC]
Rein Therapeutics raised $2.3 million in gross proceeds through a private placement of unsecured promissory notes with a 20% original issue discount. The notes mature on the earlier of a future $10M+ equity raise or June 30, 2026, indicating the company faces near-term liquidity - - Item 5.02 · Leadership · neutral [SEC]
Dr. Manuel C. Alves Aivado resigned from Rein Therapeutics' Board of Directors effective immediately on February 16, 2026. The company explicitly stated the resignation was not due to any disagreement regarding operations, policies, or practices, suggesting a routine or personal
Recent Insider Filings
- - Rickenbach Josef H. von (Insider)
- - James Brian Windsor (President and Chief Executive Officer)
- - Voss Capital, LP (10% Owner)
- - Voss Capital, LP (10% Owner)
- - Manuel Aivado (Insider)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in RNTX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
RNTX Insider Trading - FAQ
- What is the latest insider trade for RNTX?
- Rein Therapeutics, Inc. (RNTX) had 2 insider filings in the last 90 days, with the most recent on 2026-05-29. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying RNTX stock?
- 5 insider purchases of RNTX were filed in the last 90 days, totaling $75K.
- How many insiders are selling RNTX stock?
- 0 insider sales of RNTX were filed in the last 90 days.
- Where can I see RNTX SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks RNTX Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live RNTX dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.