Lunai Bioworks Inc.
Lunai Bioworks Inc. (RENB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · RENB · as of Sep 30, 2025
Ownership Breakdown
21
Institutional Holders
▼ 23 vs Q2
$1.41M
Total Inst. Value
▼ $2.75M vs Q2
23.18M
Shares Outstanding
freeFloat 42.83%
1.23M
13F Shares Held
▼ 13.20M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
RENB largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC pharmaceutical preparations | 517.6K | 22.98% | 22.98% | $735.03M | Nov 7, 2025 | NEW |
MILLENNIUM MANAGEMENT LLC pharmaceutical preparations | 202.6K | 9.00% | 9.00% | $287.73M | Nov 14, 2025 | NEW |
BLACKROCK, INC. pharmaceutical preparations | 127.3K | 5.65% | 5.65% | $16.56M | Nov 12, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 126.5K | 5.62% | 5.62% | $179.77M | Nov 12, 2025 | NEW |
BARCLAYS PLC pharmaceutical preparations | 69.5K | 4.28% | 4.28% | $33.60M | Mar 19, 2026 | ▲ 69.5K |
RENAISSANCE TECHNOLOGIES LLC pharmaceutical preparations | 37.8K | 1.68% | 1.68% | $53.62M | Nov 13, 2025 | NEW |
SUSQUEHANNA INTERNATIONAL GROUP, LLP pharmaceutical preparations | 37.3K | 1.66% | 1.66% | $52.97M | Nov 14, 2025 | NEW |
UBS GROUP AG pharmaceutical preparations | 37.4K | 1.66% | 1.66% | $4.86M | Nov 13, 2025 | NEW |
STATE STREET CORP pharmaceutical preparations | 35.7K | 1.59% | 1.59% | $50.73M | Nov 14, 2025 | NEW |
NORTHERN TRUST CORP pharmaceutical preparations | 21.4K | 0.95% | 0.95% | $2.78M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
1
Increased
+69.5K shares19
New Positions
first time holders1
Decreased
−453 shares29
Sold Out
fully exitedNet shares change (top 50)
+69.1K
+69.5K / −453
Net new holders
-10
19 new / 29 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
RENB insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
3
Buy transactions
1
Sell transactions
3.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
William Anderson Wittekind 10 percent owner | Mar 10, 2025 | J-Other | 350,000 | — | — | 3.35M | Form 4 ↗ |
van Tilburg Maurice director | Jan 21, 2025 | Award | 1,000,000 | $0.72 | $720.0K | 1.00M | Form 4 ↗ |
van Tilburg Maurice director | Jan 21, 2025 | Award | 250,000 | — | — | 250.0K | Form 4 ↗ |
Fuentes Nathen Chief Financial Officer | Jan 21, 2025 | Award | 250,000 | $0.71 | $177.5K | 250.0K | Form 4 ↗ |
Collins Mark Anthony director | Nov 4, 2024 | Award | 120,968 | $0.62 | $75.0K | 121.0K | Form 4 ↗ |
Calder Douglas W director | Nov 4, 2024 | Award | 120,968 | $0.62 | $75.0K | 121.0K | Form 4 ↗ |
Tarsh Simon Interim CFO | Nov 4, 2024 | Award | 58,500 | $0.62 | $36.3K | 58.5K | Form 4 ↗ |
MCNULTY JAMES A director | Nov 4, 2024 | Award | 120,968 | $0.62 | $75.0K | 121.0K | Form 4 ↗ |
Weinstein David Hershel Chief Executive Officer | Oct 14, 2024 | Award | 1,600,000 | $0.55 | $880.0K | 1.60M | Form 4 ↗ |
Weinstein David Hershel Chief Executive Officer | Oct 14, 2024 | Award | 250,000 | — | — | 250.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Lunai Bioworks Inc. (RENB) is primarily owned by institutional investors, who hold approximately 5.3% of total shares outstanding. Company insiders own approximately 57.17%, while retail and public investors account for the remaining 37.52%.
The largest institutional shareholder of Lunai Bioworks Inc. is VANGUARD GROUP INC, holding approximately 517,625 shares — equal to 22.98% of outstanding shares — as of September 30, 2025.
A total of 21 institutional investors currently hold RENB stock, with a combined institutional value of approximately $1,413,969 as of the most recent 13F filing period.
Frequently asked questions
RENB ownershipLunai Bioworks Inc. (RENB) is primarily owned by institutional investors, who hold approximately 5.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 22.98% stake. Company insiders hold 57.17%. Data sourced from SEC Form 13F as of September 30, 2025.