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Rallybio (RLYB) Institutional Ownership

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$16.92 +0.02 (+0.09%)
As of 02:03 PM Eastern
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Institutional Ownership Changes (13F Filings) for Rallybio (NASDAQ:RLYB)

Current
Institutional Ownership
Percentage
90.34%
Number of
Institutional Buyers
(last 12 months)
8
Total
Institutional Inflows
(last 12 months)
$18.89M
Number of
Institutional Sellers
(last 12 months)
3
Total
Institutional Outflows
(last 12 months)
$6.05M
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RLYB Institutional Buying and Selling by Quarter

Rallybio Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
9/22/2026State Street Corp12,996$208K0.0%N/A0.245%
9/2/2026Citadel Advisors LLC72,200$1.16M0.0%N/A1.360%
8/19/2026Nantahala Capital Management LLC188,422$3.01M0.0%-37.3%3.548%
8/17/2026Almitas Capital LLC120,682$1.93M0.5%-36.9%2.273%
8/14/2026ADAR1 Capital Management LLC926,352$14.82M0.7%+4,411.1%17.445%
8/7/2026BlackRock Inc.30,332$485K0.0%+73.5%0.572%
2/18/2026XTX Topco Ltd97,313$67K0.0%+64.6%1.843%
2/17/2026Almitas Capital LLC1,529,653$1.05M0.2%-0.6%28.971%
2/12/2026Renaissance Technologies LLC835,692$573K0.0%+16.9%15.828%
2/9/2026Geode Capital Management LLC248,005$170K0.0%+1.2%4.697%
11/17/2025Susquehanna International Group LLP136,294$68K0.0%+485.9%0.323%
11/17/2025Citadel Advisors LLC438,705$219K0.0%+576.1%1.039%
11/17/2025Almitas Capital LLC1,538,727$768K0.2%-15.3%3.642%
10/23/2025Canaan Partners XI LLC450,000$225K0.2%-52.2%1.077%
7/24/2025Aberdeen Group plc1,595,262$539K0.0%-7.6%3.834%
7/17/2025Canaan Partners XI LLC940,984$318K0.2%-38.6%2.261%
5/16/2025Allostery Investments LP752,235$492K0.7%-6.4%1.808%
4/9/2025Canaan Partners XI LLC1,532,552$1.00M1.5%-9.7%3.683%
2/17/2025Northeast Financial Consultants Inc96,422$93K0.0%+336.5%0.232%
2/17/2025Allostery Investments LP803,398$771K0.8%N/A1.936%
2/17/2025Almitas Capital LLC1,298,119$1.25M0.3%+48.3%3.129%
2/13/2025Renaissance Technologies LLC441,318$424K0.0%+9.3%1.064%
1/21/2025Canaan Partners XI LLC1,697,684$1.63M2.1%-11.2%4.092%
11/16/2024Geode Capital Management LLC244,986$287K0.0%+11.4%0.590%
11/15/2024Jane Street Group LLC22,275$26K0.0%-58.0%0.054%
11/15/2024Point72 Asia Singapore Pte. Ltd.22,119$26K0.0%-51.4%0.053%
11/13/2024FMR LLC2,315,480$2.71M0.0%+1.1%5.581%
10/16/2024Canaan Partners XI LLC1,910,987$2.24M1.9%-7.2%4.610%
9/16/2024Point72 Asia Singapore Pte. Ltd.45,531$61K0.0%N/A0.110%
8/16/2024Almitas Capital LLC100,876$135K0.1%N/A0.243%
8/15/2024Point72 Asia Singapore Pte. Ltd.45,531$61K0.0%N/A0.110%
8/12/2024Hsbc Holdings PLC17,531$25K0.0%N/A0.042%
8/9/2024Renaissance Technologies LLC340,700$457K0.0%-30.2%0.822%
8/9/2024Johnson & Johnson3,636,363$4.87M1.2%N/A8.773%
8/6/2024Acadian Asset Management LLC67,695$89K0.0%+116.3%0.163%
5/10/2024Acadian Asset Management LLC31,294$57K0.0%N/A0.083%
5/10/2024Vanguard Group Inc.1,076,771$1.99M0.0%+1.2%2.848%
1/31/2024abrdn plc1,727,067$4.13M0.0%N/A4.570%
1/12/2024SG Americas Securities LLC16,813$40K0.0%N/A0.044%
11/13/2023CHI Advisors LLC390,734$1.32M0.4%-28.0%1.034%
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11/13/2023Mariner LLC408,180$1.38M0.0%-32.7%1.080%
11/8/2023Financial Security Advisor Inc.50,278$169K0.1%N/A0.133%
9/21/2023Barclays PLC6,103$35K0.0%-36.3%0.016%
8/22/2023CHI Advisors LLC542,774$3.07M0.9%-28.6%1.436%
8/15/2023Caas Capital Management LP31,470$178K0.0%-80.8%0.083%
8/11/2023Sectoral Asset Management Inc.375,960$2.13M0.4%-31.9%0.995%
8/4/2023American International Group Inc.14,715$83K0.0%+62.0%0.039%
5/12/2023Sectoral Asset Management Inc.551,937$3.15M0.6%-11.0%1.450%
5/11/2023CHI Advisors LLC760,543$4.34M1.2%+4.7%1.997%
4/24/2023DekaBank Deutsche Girozentrale30,000$168K0.0%N/A0.079%
2/10/2023Sectoral Asset Management Inc.619,891$4.07M0.8%+165.6%1.935%
2/10/2023Tekla Capital Management LLC1,727,067$11.35M0.4%-0.8%5.392%
2/6/2023New Leaf Venture Partners L.L.C.3,301,603$21.69M15.7%+43.4%10.308%
2/1/2023Canaan Partners XI LLC2,059,712$13.53M10.6%-14.5%6.431%
11/15/2022Northeast Financial Consultants Inc13,066$189K0.0%N/A0.041%
11/14/2022MetLife Investment Management LLC10,279$149K0.0%N/A0.032%
11/8/2022New York State Common Retirement Fund10,337$150K0.0%-19.8%0.032%
11/1/2022Tekla Capital Management LLC1,740,931$25.19M1.0%-9.8%5.418%
8/15/2022Laurion Capital Management LP402,000$3.04M0.0%+0.5%1.251%
8/11/2022Alps Advisors Inc.19,060$144K0.0%N/A0.059%
7/29/2022Tekla Capital Management LLC1,931,120$14.58M0.6%-12.0%6.010%


RLYB Institutional Ownership - Frequently Asked Questions

During the previous two years, 17 institutional investors and hedge funds held shares of Rallybio. The most heavily invested institutionals were ADAR1 Capital Management LLC ($14.82M), Nantahala Capital Management LLC ($3.01M), FMR LLC ($2.71M), Almitas Capital LLC ($1.93M), Citadel Advisors LLC ($1.16M), Renaissance Technologies LLC ($573K), and Aberdeen Group plc ($539K).Learn more on Rallybio's institutional investors.

90.34% of Rallybio's stock is owned by institutional investors. Learn more on RLYB's institutional investor holdings.

Of the 12 institutional investors that purchased Rallybio's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: ADAR1 Capital Management LLC ($905.82K), Allostery Investments LP ($803.40K), Citadel Advisors LLC ($446.02K), Almitas Capital LLC ($422.69K), Renaissance Technologies LLC ($158.51K), Susquehanna International Group LLP ($113.03K), and Northeast Financial Consultants Inc ($74.33K).

Institutional investors have bought a total of 1,652,804 shares in the last 24 months. This purchase volume represents approximately $18.89M in transactions.

The following institutional investors have sold Rallybio stock in the last 24 months: Canaan Partners XI LLC ($490.98K), Almitas Capital LLC ($358.36K), and Nantahala Capital Management LLC ($112.21K).

Institutional investors have sold a total of 961,560 shares in the last 24 months. This volume of shares sold represents approximately $6.05M in transactions.


Related Companies

Institutional ownership data for NASDAQ:RLYB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 9/22/2026. New 13F filings are added each quarter as they're published.
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