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Upstream Bio, Inc. (UPB)
NASDAQ:UPB
US Market
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Upstream Bio, Inc. (UPB) Ownership - Who Owns Upstream Bio, Inc.?

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Upstream Bio, Inc. (UPB) Ownership Overview

28.89%13.21%46.32%3.39%8.19%
28.89% Insiders
46.32% Other Institutional Investors
3.39% ETFs
8.19% Public Companies and
Individual Investors
The ownership structure of Upstream Bio, Inc. (UPB) stock is a mix of institutional, retail, and individual investors. Approximately 62.92% of the company’s stock is owned by Institutional Investors, 28.89% is owned by Insiders, and 8.19% is owned by Public Companies and Individual Investors.
The ownership structure of Upstream Bio, Inc. (UPB) stock is a mix of institutional, retail, and individual investors. Approximately 59.53% of the company’s stock is owned by Institutional Investors, 28.89% is owned by Insiders, and 3.39% is owned by Public Companies and Individual Investors.

Recent Insider Trading Activity

Date
Name
Activity
Value
Oct 17, 2024
xxxxxxxxxxxxx
$14025000
Oct 17, 2024
xxxxxxxxxxxxx
$14025000
Oct 17, 2024
xxxxxxxxxxxxx
$19975000

Recent Hedge Fund Trading Activity

Date
Firm
Activity
Value
Jun 30, 2025
xxxxxxxxxxxxx
$6129606

Top Shareholders

Holder
# of Shares
Type
% Holding
Value
5,494,410Insider10.19%104,009,181
4,554,873Insider8.45%86,223,746
4,554,873Insider8.45%86,223,746
2,036,293Institution3.78%38,547,026
1,970,461Institution3.66%37,300,827
1,769,260Institution3.28%33,492,092
1,239,324Institution2.30%23,460,403
1,161,563Institution2.15%21,988,388
1,104,477Institution2.05%20,907,750
894,733Insider1.66%16,937,296

Top Mutual Fund Holders

Holder
# of Shares
Type
% Holding
Value
1,769,260Institution3.28%33,492,092
1,239,324Institution2.30%23,460,403
1,104,477Institution2.05%20,907,750
772,539Institution1.43%14,624,163
511,768Institution0.95%9,687,768
454,709Institution0.84%8,607,641
370,114Institution0.69%7,006,258
198,841Institution0.37%3,764,060
101,143Institution0.19%1,914,637
86,917Institution0.16%1,645,339

Top ETF Holders

Holder
# of Shares
Type
% Holding
Value
1,611,865Institution2.99%24,677,653
843,579Institution1.56%15,968,950
309,247Institution0.57%5,854,046
167,591Institution0.31%2,565,818
166,157Institution0.31%2,543,864
71,929Institution0.13%1,339,318
69,451Institution0.13%762,572
60,647Institution0.11%1,129,247
45,595Institution0.08%848,979
25,688Institution0.05%486,274

FAQ

Who Owns Upstream Bio, Inc. (UPB)?
According to the latest TipRanks data, approximately 46.32% of the company's stock is held by institutional investors, 28.89% is held by insiders, and 8.19% is held by retail investors.
    What percentage of Upstream Bio, Inc. (UPB) stock is held by institutional investors?
    According to the latest TipRanks data, approximately 46.32% of Upstream Bio, Inc. (UPB) stock is held by institutional investors.
      What percentage of Upstream Bio, Inc. (UPB) stock is held by retail investors?
      According to the latest TipRanks data, approximately 8.19% of Upstream Bio, Inc. (UPB) stock is held by retail investors.
        Who owns the most shares of Upstream Bio, Inc. (UPB)?
        AI Upstream LLC owns the most shares of Upstream Bio, Inc. (UPB).
          What is the significance of the ownership structure for a publicly traded company?
          The ownership structure can impact the company's decision making, as large institutional investors may exert influence on the company's management and can also affect the company's stock price with their buying and selling patterns.
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