Rallybio Ownership | Who Owns Rallybio?

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Rallybio Ownership Summary

Rallybio is owned by 22.71% institutional investors, 4.15% insiders, and 73.14% 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 5.00% of its assets in Rallybio shares.

RLYB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Rallybio	22.71%	4.15%	73.14%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.75%	11.83%	52.41%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
New leaf venture partners	3.30M	7.36%	$1.65M
Cormorant asset management, lp	400.00K	7.03%	$3.59M
Balyasny asset management	376.57K	6.62%	$3.38M
Laurion capital management lp	302.76K	5.32%	$2.72M
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
Deltec asset management	33.75K	0.59%	$302.74K
Goldman sachs group	181.20K	0.44%	$242.81K

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
New leaf venture partners	3.30M	3.83%	$1.65M
Cormorant asset management, lp	400.00K	0.18%	$3.59M
Laurion capital management lp	302.76K	0.12%	$2.72M
Nantahala capital management	300.63K	0.10%	$2.70M
Deltec asset management	33.75K	0.06%	$302.74K
Gts securities	22.02K	0.01%	$197.48K
Balyasny asset management	376.57K	0.00%	$3.38M
Millennium management	338.91K	0.00%	$325.35K
Fortitude family office	53.00	0.00%	$475.00
Legal & general group	-	-	-

Top Buyers

Holder	Shares	% Assets	Change
Cormorant asset management, lp	400.00K	0.18%	400.00K
Balyasny asset management	376.57K	0.00%	376.57K
Laurion capital management lp	302.76K	0.12%	302.76K
Nantahala capital management	300.63K	0.10%	300.63K
Goldman sachs group	181.20K	-	167.96K

Top Sellers

Holder	Shares	% Assets	Change
Viking global investors lp	-	-	-4.19M
Johnson & johnson	-	-	-3.64M
5am venture management	-	-	-3.63M
Tpg gp a	-	-	-3.03M
Pivotal bioventure partners investment advisor	-	-	-2.40M

New Positions

Holder	Shares	% Assets	Change	Value
Cormorant asset management, lp	400.00K	0.18%	400.00K	$3.59M
Balyasny asset management	376.57K	0.00%	376.57K	$3.38M
Laurion capital management lp	302.76K	0.12%	302.76K	$2.72M
Nantahala capital management	300.63K	0.10%	300.63K	$2.70M
Deltec asset management	33.75K	0.06%	33.75K	$302.74K

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 %
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%
Mar 31, 2025	47	-4.08%	32,001,262	-1.32%	71	1.35%	11	-45.00%	15	36.36%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Fidelity Growth Compy Commingled Pl S	264.48K	5.00%	264.48K
Fidelity Growth Company Fund	207.27K	3.92%	207.27K
Vifag 2002 SICAV	100.00K	1.89%	-
abrdn Healthcare Investors	630.00K	1.51%	-125.08K
Vanguard Total Stock Mkt Idx Inv	79.47K	1.50%	-
abrdn Healthcare Opportunities Fund	594.62K	1.43%	-
abrdn Healthcare Opportunities	594.62K	1.43%	-
Fidelity Select Biotechnology	581.09K	1.40%	-
Fidelity Growth Company K6	56.30K	1.06%	56.30K
Fidelity Series Growth Company	53.60K	1.01%	53.60K

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 22.71%, followed by 4.15% insiders and 73.14% retail investors. The average institutional ownership in Rallybio's industry, Biotech Stocks , is 35.75%, 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%), Cormorant asset management, lp (400K shares, 7.03%), and Balyasny asset management (376.57K shares, 6.62%). Together, they hold 21.01% 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 5.00% of its total shares outstanding invested in 264.48K Rallybio shares.

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