Rallybio Ownership | Who Owns Rallybio?

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Rallybio Ownership Summary

Rallybio is owned by 71.35% institutional investors, 24.21% insiders, and 4.44% retail investors. New leaf venture partners is the largest institutional shareholder, holding 7.36% of RLYB shares. Fidelity Growth Compy Commingled Pl S is the top mutual fund, with 4.99% of its assets in Rallybio shares.

RLYB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Rallybio	71.35%	24.21%	4.44%
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
New leaf venture partners	3.30M	7.36%	$1.65M
Nantahala capital management	300.63K	5.28%	$2.70M
Vanguard group	1.02M	2.26%	$697.15K
Blackrock	315.63K	0.77%	$422.94K
Millennium management	338.91K	0.76%	$325.35K
Goldman sachs group	181.20K	0.44%	$242.81K
Vanguard fiduciary trust	13.55K	0.24%	$121.52K
Dimensional fund advisors lp	11.28K	0.20%	$101.18K
Rhumbline advisers	10.37K	0.03%	$13.90K
Vanguard global advisers	1.44K	0.03%	$12.94K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
New leaf venture partners	3.30M	3.83%	$1.65M
Nantahala capital management	300.63K	0.10%	$2.70M
Millennium management	338.91K	0.00%	$325.35K
Fortitude family office	53.00	0.00%	$475.00
Rockefeller capital management	550.00	-	$274.00
Legal & general group	-	-	-
Prudential financial	-	-	-
Marshall wace, llp	-	-	-
Abrdn	-	-	-
Renaissance	-	-	-

Top Buyers

Holder	Shares	% Assets	Change
Nantahala capital management	300.63K	0.10%	300.63K
Goldman sachs group	181.20K	-	167.96K
Vanguard group	1.02M	-	16.62K
Vanguard fiduciary trust	13.55K	-	13.55K
Dimensional fund advisors lp	11.28K	-	11.28K

Top Sellers

Holder	Shares	% Assets	Change
Viking global investors lp	-	-	-4.19M
Tpg gp a	-	-	-3.03M
Pivotal bioventure partners investment advisor	-	-	-2.40M
Fmr	-	-	-1.69M
Abrdn	-	-	-1.60M

New Positions

Holder	Shares	% Assets	Change	Value
Nantahala capital management	300.63K	0.10%	300.63K	$2.70M
Vanguard fiduciary trust	13.55K	-	13.55K	$121.52K
Dimensional fund advisors lp	11.28K	-	11.28K	$101.18K
Cubist systematic strategies	1.82K	-	1.82K	$2.44K
Macquarie group	1.57K	-	1.57K	$2.11K

Sold Out

Holder	Change
Nelson, van denburg & campbell wealth management group	-5.00
Farther finance advisors	-9.00
Nisa investment advisors	-25.00
Allworth financial lp	-50.00
Jpmorgan chase	-82.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	38	-	4,066,443	-12.86%	71	1.06%	19	26.67%	7	-69.57%
Mar 31, 2026	23	-48.89%	1,291,621	-94.82%	22	0.65%	11	-	12	9.09%
Dec 31, 2025	35	-22.22%	13,556,577	-52.09%	3	0.09%	9	-30.77%	7	-46.15%
Sep 30, 2025	43	-10.42%	28,283,712	-9.33%	63	1.30%	13	-23.53%	13	8.33%
Jun 30, 2025	48	9.09%	31,192,738	31.24%	69	2.47%	17	70.00%	12	-20.00%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	265.13K	4.99%	-
Fidelity Growth Company Fund	207.41K	3.91%	-256.00
Vanguard Morn Total Stk Mkt Idx Investor	134.62K	2.54%	-
Vanguard Total Stock Mkt Idx Inv	134.62K	2.54%	-
Vanguard MStar Total Stk Mkt Idx Invest	134.62K	2.54%	-
Vifag 2002 SICAV	100.00K	1.89%	-
abrdn Healthcare Investors	630.00K	1.51%	-125.08K
abrdn Healthcare Opportunities Fund	594.62K	1.43%	-
abrdn Healthcare Opportunities	594.62K	1.43%	-
Fidelity Select Biotechnology	581.09K	1.40%	-

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 18, 2026	ADAR1 Capital Management, LLC	-	Buy	$83.98K
May 19, 2026	ADAR1 Capital Management, LLC	-	Buy	$139.82K
May 19, 2026	ADAR1 Capital Management, LLC	-	Buy	$2.76K
May 13, 2026	ADAR1 Capital Management, LLC	-	Buy	$56.31K
May 15, 2026	ADAR1 Capital Management, LLC	-	Buy	$1.38K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	14	-
2026 Q1	-	1
2025 Q2	-	-
2025 Q1	-	-
2024 Q2	-	-

RLYB Ownership FAQ

Who Owns Rallybio?

Rallybio shareholders are primarily institutional investors at 71.35%, followed by 24.21% insiders and 4.44% retail investors. The average institutional ownership in Rallybio's industry, Biotech Stocks , is 379.61%, which Rallybio falls below.

Who owns the most shares of Rallybio?

Rallybio’s largest shareholders are New leaf venture partners (3.3M shares, 7.36%), Nantahala capital management (300.64K shares, 5.28%), and Vanguard group (1.02M shares, 2.26%). Together, they hold 14.90% of Rallybio’s total shares outstanding.

Does Blackrock own Rallybio?

Yes, BlackRock owns 0.77% of Rallybio, totaling 315.63K shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 422.94K$. In the last quarter, BlackRock decreased its holdings by -1.36M shares, a -81.17% change.

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

New leaf venture partners is Rallybio’s biggest shareholder by percentage of total assets invested, with 3.83% of its assets in 3.3M Rallybio shares, valued at 1.65M$.

Who is the top mutual fund holder of Rallybio shares?

Fidelity Growth Compy Commingled Pl S is the top mutual fund holder of Rallybio shares, with 4.99% of its total shares outstanding invested in 265.13K Rallybio shares.

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