Boundless Bio Ownership | Who Owns Boundless Bio?

Boundless Bio Ownership Summary

Boundless Bio is owned by 68.16% institutional investors, 12.09% insiders, and 19.75% retail investors. Fmr is the largest institutional shareholder, holding 12.05% of BOLD shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 5.53% of its assets in Boundless Bio shares.

BOLD Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Boundless Bio	68.16%	12.09%	19.75%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Biotech Stocks	379.61%	11.70%	-291.31%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Fmr	2.70M	12.05%	$2.96M
Citadel advisors	1.34M	6.00%	$1.48M
Nextech invest	1.23M	5.49%	$1.51M
Vanguard group	662.76K	2.96%	$795.31K
Stonepine capital management	597.68K	2.67%	$657.45K
Wellington management group llp	556.23K	2.49%	$611.86K
Renaissance	399.00K	1.78%	$438.90K
Alyeska investment group	300.00K	1.34%	$330.00K
Redmile group	245.46K	1.10%	$301.91K
Rbf capital	200.00K	0.89%	$220.00K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Stonepine capital management	597.68K	0.26%	$657.45K
Nextech invest	1.23M	0.23%	$1.51M
Redmile group	245.46K	0.03%	$301.91K
Almitas capital	86.81K	0.02%	$106.77K
Rbf capital	200.00K	0.01%	$220.00K
Gsa capital partners llp	96.82K	0.01%	$107.00K
Bridgeway capital management	50.50K	0.00%	$55.55K
Alyeska investment group	300.00K	0.00%	$330.00K
Xtx topco	34.67K	0.00%	$38.14K
Renaissance	399.00K	0.00%	$438.90K

Top Buyers

Holder	Shares	% Assets	Change
Vanguard group	662.76K	-	93.10K
Vanguard fiduciary trust	65.14K	-	65.14K
Renaissance	399.00K	0.00%	57.60K
Gsa capital partners llp	96.82K	0.01%	34.35K
Geode capital management	127.58K	-	33.48K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-2.18M
Sectoral asset management	-	-	-678.57K
Redmile group	245.46K	0.03%	-343.58K
Pfm health sciences, lp	-	-	-240.51K
Northern trust	-	-	-189.47K

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	65.14K	-	65.14K	$71.65K
Pure financial advisors	10.10K	0.00%	10.10K	$11.11K
Cwm	8.00	-	8.00	$9.00
Caitong asset management	3.00	-	3.00	$3.00
Sbi securities	1.00	-	1.00	$1.00

Sold Out

Holder	Change
Barclays	-2.00
Eversource wealth advisors	-2.00
True wealth design	-5.00
Clearstead advisors	-24.00
Deutsche bank ag\	-97.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	41	13.89%	15,301,083	80.31%	68	4.75%	24	71.43%	9	-
Mar 31, 2026	36	2.86%	8,485,823	-3.36%	37	2.47%	14	-12.50%	9	12.50%
Dec 31, 2025	5	-85.29%	1,403,999	-85.41%	6	0.34%	4	-63.64%	-	-100.00%
Sep 30, 2025	2	-94.87%	569,825	-93.58%	2	0.16%	2	-88.24%	-	-100.00%
Jun 30, 2025	42	-20.75%	9,787,223	-42.33%	43	0.76%	18	-14.29%	17	13.33%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	1.24M	5.53%	-
Fidelity Growth Company Fund	899.16K	4.00%	-1.11K
Vanguard Total Stock Mkt Idx Inv	445.18K	1.98%	-
Vanguard Morn Total Stk Mkt Idx Investor	445.18K	1.98%	-
Vanguard MStar Total Stk Mkt Idx Invest	445.18K	1.98%	-
Fidelity Growth Company K6	227.61K	1.01%	1.11K
Fidelity Series Growth Company	199.72K	0.89%	-3.10K
Vanguard Institutional Extnd Mkt Idx Tr	152.01K	0.68%	-
Fidelity Global Micro-Cap F	80.00K	0.36%	-
Bridgeway Ultra-Small Company	77.50K	0.34%	77.50K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Aug 26, 2026	TANG KEVIN	-	Sell	$54.35K
Jul 17, 2026	TANG KEVIN	-	Buy	$646.60
Jul 21, 2026	TANG KEVIN	-	Buy	$7.26K
Jul 20, 2026	TANG KEVIN	-	Buy	$3.96K
Jul 16, 2026	TANG KEVIN	-	Buy	$45.12K

Insider Transactions Trends

Date	Buy	Sell
2026 Q3	14	3
2026 Q2	8	-
2026 Q1	-	-
2025 Q2	-	-
2020 Q1	-	-

BOLD Ownership FAQ

Who Owns Boundless Bio?

Boundless Bio shareholders are primarily institutional investors at 68.16%, followed by 12.09% insiders and 19.75% retail investors. The average institutional ownership in Boundless Bio's industry, Biotech Stocks , is 379.61%, which Boundless Bio falls below.

Who owns the most shares of Boundless Bio?

Boundless Bio’s largest shareholders are Fmr (2.7M shares, 12.05%), Citadel advisors (1.34M shares, 6.00%), and Nextech invest (1.23M shares, 5.49%). Together, they hold 23.55% of Boundless Bio’s total shares outstanding.

Does Blackrock own Boundless Bio?

BlackRock is not among the top 10 institutional shareholders of Boundless Bio.

Who is Boundless Bio’s biggest shareholder by percentage of total assets invested?

Stonepine capital management is Boundless Bio’s biggest shareholder by percentage of total assets invested, with 0.26% of its assets in 597.68K Boundless Bio shares, valued at 657.45K$.

Who is the top mutual fund holder of Boundless Bio shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of Boundless Bio shares, with 5.53% of its total shares outstanding invested in 1.24M Boundless Bio shares.

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