Boundless Bio, Inc.
Boundless Bio, Inc. (BOLD) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BOLD · as of Mar 31, 2024
Ownership Breakdown
43
Institutional Holders
▲ 43 vs Q4
$208.79M
Total Inst. Value
▲ $208.79M vs Q4
22.46M
Shares Outstanding
freeFloat 76.59%
14.58M
13F Shares Held
▲ 14.58M vs Q4
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
BOLD largest shareholders · institutional ownership
Q1 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
FMR LLC pharmaceutical preparations | 3.26M | 14.67% | 14.67% | $48.08B | May 13, 2024 | NEW |
RA CAPITAL MANAGEMENT, L.P. pharmaceutical preparations | 2.18M | 9.81% | 9.81% | $31.07B | May 15, 2024 | NEW |
NEXTECH INVEST LTD. pharmaceutical preparations | 1.23M | 5.52% | 5.52% | $17.50B | May 15, 2024 | NEW |
WELLINGTON MANAGEMENT GROUP LLP pharmaceutical preparations | 1.17M | 5.27% | 5.27% | $16.31B | May 15, 2024 | NEW |
REDMILE GROUP, LLC pharmaceutical preparations | 1.11M | 5.01% | 5.01% | $15.87B | May 15, 2024 | NEW |
SECTORAL ASSET MANAGEMENT INC pharmaceutical preparations | 855.9K | 3.85% | 3.85% | $12.20B | May 14, 2024 | NEW |
CITADEL ADVISORS LLC pharmaceutical preparations | 854.8K | 3.84% | 3.84% | $11.98B | May 15, 2024 | NEW |
BOXER CAPITAL, LLC pharmaceutical preparations | 711.3K | 3.20% | 3.20% | $10.14B | May 15, 2024 | NEW |
FEDERATED HERMES, INC. pharmaceutical preparations | 375.0K | 1.69% | 1.69% | $5.34B | May 14, 2024 | NEW |
ENSIGN PEAK ADVISORS, INC pharmaceutical preparations | 375.0K | 1.69% | 1.69% | $5.34B | May 14, 2024 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2024 vs prior quarter
Q1 2024
0
Increased
+0 shares43
New Positions
first time holders0
Decreased
−0 shares0
Sold Out
fully exitedNet shares change (top 50)
+0
+0 / −0
Net new holders
+43
43 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
BOLD insider trading · insider activity
Source: SEC Form 4
6
Buy transactions
0
Sell transactions
0.00
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 |
|---|---|---|---|---|---|---|---|
Oien Jessica See Remarks | Jan 23, 2026 | Award | 220,000 | $1.26 | $277.2K | 220.0K | Form 4 ↗ |
Hassig Christian Chief Scientific Officer | Jan 23, 2026 | Award | 230,000 | $1.26 | $289.8K | 230.0K | Form 4 ↗ |
Doebele Robert Chief Medical Officer | Jan 23, 2026 | Award | 230,000 | $1.26 | $289.8K | 230.0K | Form 4 ↗ |
Hornby Zachary President & CEO | Jan 23, 2026 | Award | 600,000 | $1.26 | $756.0K | 600.0K | Form 4 ↗ |
HINKLE DAVID A See Remarks | Jan 23, 2026 | Award | 140,000 | $1.26 | $176.4K | 140.0K | Form 4 ↗ |
Brennan Christine director | Jun 23, 2025 | Award | 16,000 | $1.03 | $16.5K | 16.0K | Form 4 ↗ |
Christensen James director | Jun 23, 2025 | Award | 16,000 | $1.03 | $16.5K | 16.0K | Form 4 ↗ |
Lew Jennifer director | Jun 23, 2025 | Award | 16,000 | $1.03 | $16.5K | 16.0K | Form 4 ↗ |
Lim Jonathan E director | Jun 23, 2025 | Award | 24,000 | $1.03 | $24.7K | 24.0K | Form 4 ↗ |
Burow Kristina
| Jun 23, 2025 | Award | 16,000 | $1.03 | $16.5K | 16.0K | 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
Boundless Bio, Inc. (BOLD) is primarily owned by institutional investors, who hold approximately 64.9% of total shares outstanding. Company insiders own approximately 23.41%, while retail and public investors account for the remaining 11.68%.
The largest institutional shareholder of Boundless Bio, Inc. is FMR LLC, holding approximately 3.26 million shares — equal to 14.67% of outstanding shares — as of March 31, 2024.
A total of 43 institutional investors currently hold BOLD stock, with a combined institutional value of approximately $208,788,220 as of the most recent 13F filing period.
Frequently asked questions
BOLD ownershipBoundless Bio, Inc. (BOLD) is primarily owned by institutional investors, who hold approximately 64.9% of shares. The largest shareholder is FMR LLC with a 14.67% stake. Company insiders hold 23.41%. Data sourced from SEC Form 13F as of March 31, 2024.