RayzeBio, Inc. Common Stock
RayzeBio, Inc. Common Stock (RYZB) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · RYZB · as of Dec 31, 2023
Ownership Breakdown
108
Institutional Holders
▲ 40 vs Q3
$3.40B
Total Inst. Value
▲ $2.20B vs Q3
60.02M
Shares Outstanding
freeFloat 58.02%
54.76M
13F Shares Held
▲ 577,554 vs Q3
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
RYZB largest shareholders · institutional ownership
Q4 2023 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VIKING GLOBAL INVESTORS LP pharmaceutical preparations | 6.64M | 43.13% | 43.13% | $412.98B | Feb 14, 2024 | — held |
VENBIO PARTNERS LLC pharmaceutical preparations | 5.16M | 33.49% | 33.49% | $320.68B | Feb 14, 2024 | — held |
VERSANT VENTURE MANAGEMENT, LLC pharmaceutical preparations | 5.16M | 33.49% | 33.49% | $320.68B | Feb 8, 2024 | — held |
VR ADVISER, LLC pharmaceutical preparations | 4.03M | 26.17% | 26.17% | $250.57B | Feb 14, 2024 | ▲ 13.6K |
WELLINGTON MANAGEMENT GROUP LLP pharmaceutical preparations | 3.50M | 22.76% | 22.76% | $215.91B | Feb 12, 2024 | ▼ 371.8K |
SOFINNOVA INVESTMENTS, INC. pharmaceutical preparations | 2.42M | 15.71% | 15.71% | $150.42B | Aug 15, 2024 | — held |
ORBIMED ADVISORS LLC pharmaceutical preparations | 2.37M | 15.36% | 15.36% | $147.05B | Feb 14, 2024 | ▼ 257.7K |
REDMILE GROUP, LLC pharmaceutical preparations | 1.86M | 12.06% | 12.06% | $115.49B | Feb 14, 2024 | — held |
SAMSARA BIOCAPITAL, LLC pharmaceutical preparations | 1.85M | 11.99% | 11.99% | $114.76B | Feb 14, 2024 | — held |
BLACKROCK INC. pharmaceutical preparations | 1.37M | 8.89% | 8.89% | $85.10B | Feb 13, 2024 | ▲ 1.36M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q4 2023 vs prior quarter
Q4 2023
15
Increased
+4.07M shares14
New Positions
first time holders12
Decreased
−4.88M shares0
Sold Out
fully exitedNet shares change (top 50)
806.4K
+4.07M / −4.88M
Net new holders
+17
14 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
RYZB insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$2M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
VIKING GLOBAL INVESTORS LP 10 percent owner | Feb 26, 2024 | J-Other | 1,743,556 | $62.50 | $108.97M | 0 | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 498,510 | — | — | 1.86M | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 494,687 | — | — | 1.36M | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 864,509 | — | — | 864.5K | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 432,254 | — | — | 0 | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 498,510 | — | — | 0 | Form 4 ↗ |
Redmile Group, LLC 10 percent owner | Sep 19, 2023 | C-Conversion | 864,509 | — | — | 0 | Form 4 ↗ |
venBio Global Strategic Fund III, L.P. 10 percent owner | Sep 19, 2023 | C-Conversion | 247,343 | — | — | 5.16M | Form 4 ↗ |
venBio Global Strategic Fund III, L.P. 10 percent owner | Sep 19, 2023 | C-Conversion | 1,123,862 | — | — | 4.91M | Form 4 ↗ |
venBio Global Strategic Fund III, L.P. 10 percent owner | Sep 19, 2023 | C-Conversion | 3,786,957 | — | — | 3.79M | 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
RayzeBio, Inc. Common Stock (RYZB) is primarily owned by institutional investors, who hold approximately 91.2% of total shares outstanding. Company insiders own approximately 41.98%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of RayzeBio, Inc. Common Stock is VIKING GLOBAL INVESTORS LP, holding approximately 6.64 million shares — equal to 43.13% of outstanding shares — as of December 31, 2023.
A total of 108 institutional investors currently hold RYZB stock, with a combined institutional value of approximately $3.40 billion as of the most recent 13F filing period.
Frequently asked questions
RYZB ownershipRayzeBio, Inc. Common Stock (RYZB) is primarily owned by institutional investors, who hold approximately 91.2% of shares. The largest shareholder is VIKING GLOBAL INVESTORS LP with a 43.13% stake. Company insiders hold 41.98%. Data sourced from SEC Form 13F as of December 31, 2023.