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Sionna Therapeutics (SION) Institutional Ownership

Sionna Therapeutics logo
$42.77 -0.35 (-0.81%)
Closing price 05/14/2026 04:00 PM Eastern
Extended Trading
$42.71 -0.06 (-0.14%)
As of 05/14/2026 07:06 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Sionna Therapeutics (NASDAQ:SION)

Number of
Institutional Buyers
(last 12 months)
68
Total
Institutional Inflows
(last 12 months)
$200.11M
Number of
Institutional Sellers
(last 12 months)
23
Total
Institutional Outflows
(last 12 months)
$155.26M
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SION Institutional Buying and Selling by Quarter

Sionna Therapeutics Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
5/14/2026 Walleye Capital LLC15,097$605K0.0%N/A0.033%
5/7/2026 AlphaCentric Advisors LLC4,818$193K0.2%+77.1%0.011%
5/6/2026 Jennison Associates LLC1,451,220$58.18M0.0%+30.1%3.215%
5/5/2026 Bank of New York Mellon Corp33,778$1.35M0.0%-3.9%0.075%
5/1/2026 Candriam S.C.A.236,813$9.49M0.0%N/A0.525%
4/25/2026 Strs Ohio2,900$116K0.0%N/A0.006%
2/19/2026 Invesco Ltd.111,162$4.57M0.0%N/A0.249%
2/18/2026XTX Topco Ltd4,926$203K0.0%N/A0.011%
2/18/2026Virtus Investment Advisers LLC6,220$256K0.1%-7.1%0.014%
2/18/2026Wellington Management Group LLP38,347$1.58M0.0%-9.2%0.086%
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2/18/2026Superstring Capital Management LP180,593$7.43M4.0%N/A0.405%
2/18/2026Orbimed Advisors LLC3,561,655$146.53M3.1%-3.9%7.981%
2/18/2026Millennium Management LLC80,546$3.31M0.0%-62.4%0.180%
2/18/2026Artia Global Partners LP119,741$4.93M0.7%N/A0.268%
2/18/2026Balyasny Asset Management L.P.1,406$58K0.0%N/A0.003%
2/17/2026RA Capital Management L.P.9,905,045$407.49M4.2%-5.2%22.194%
2/17/2026Price T Rowe Associates Inc. MD831,373$34.20M0.0%+30.4%1.863%
2/17/2026 Russell Investments Group Ltd.21,941$903K0.0%+2,046.9%0.049%
2/16/2026Squarepoint Ops LLC16,360$673K0.0%+61.0%0.037%
2/16/2026 Kennedy Capital Management LLC6,752$278K0.0%N/A0.015%
2/16/2026Eventide Asset Management LLC639,045$26.29M0.4%N/A1.432%
2/16/2026Barclays PLC48,172$1.98M0.0%+173.0%0.108%
2/13/2026The Manufacturers Life Insurance Company 69,424$2.87M0.0%+116.4%0.156%
2/13/2026Kalehua Capital Management LLC197,072$8.11M7.5%N/A0.442%
2/13/2026Rafferty Asset Management LLC24,690$1.02M0.0%N/A0.055%
2/13/2026Alyeska Investment Group L.P.136,222$5.60M0.0%-26.8%0.305%
2/13/2026Siren L.L.C.300,000$12.34M0.4%-7.7%0.672%
2/13/2026Charles Schwab Investment Management Inc.123,686$5.09M0.0%+10.9%0.277%
2/13/2026 Police & Firemen s Retirement System of New Jersey4,232$174K0.0%+30.9%0.009%
2/13/2026State Street Corp693,395$28.53M0.0%+188.7%1.554%
2/13/2026 Wells Fargo & Company MN17,551$722K0.0%+131.7%0.039%
2/13/2026Atlas Venture Life Science Advisors LLC2,995,602$123.24M14.2%-17.1%6.712%
2/12/2026MetLife Investment Management LLC8,565$352K0.0%+6.6%0.019%
2/12/2026 Ensign Peak Advisors Inc79,862$3.29M0.0%N/A0.179%
2/12/2026 AlphaCentric Advisors LLC2,720$112K0.1%N/A0.006%
2/12/2026CIBC Private Wealth Group LLC4,500$185K0.0%N/A0.010%
2/12/2026 Alps Advisors Inc.36,648$1.51M0.0%N/A0.082%
2/12/2026 Nuveen LLC23,734$976K0.0%+48.0%0.053%
2/11/2026 Deutsche Bank AG10,029$413K0.0%+4.5%0.022%
2/11/2026 Franklin Resources Inc.175,483$7.22M0.0%-27.5%0.393%
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2/11/2026 JPMorgan Chase & Co.1,231,819$50.68M0.0%-37.7%2.760%
2/11/2026 Los Angeles Capital Management LLC5,189$197K0.0%N/A0.012%
2/10/2026 TD Asset Management Inc113,352$4.66M0.0%+30.2%0.254%
2/10/2026Goldman Sachs Group Inc.36,269$1.49M0.0%+197.8%0.081%
2/10/2026 Seven Grand Managers LLC50,000$2.06M0.2%N/A0.112%
2/9/2026Geode Capital Management LLC380,042$15.64M0.0%+20.1%0.852%
2/6/2026 ProShare Advisors LLC4,903$202K0.0%N/A0.011%
1/30/2026 Jennison Associates LLC1,115,278$45.88M0.0%+11.8%2.499%
1/29/2026 UBS Group AG89,177$3.67M0.0%+91.1%0.200%
1/29/2026Vanguard Group Inc.1,184,951$48.75M0.0%+3.7%2.655%
1/29/2026 China Universal Asset Management Co. Ltd.10,272$423K0.0%+105.4%0.023%
1/27/2026 GF Fund Management CO. LTD.876$36K0.0%N/A0.002%
1/26/2026 Mirae Asset Global Investments Co. Ltd.2,169$89K0.0%N/A0.005%
1/16/2026 Aberdeen Group plc839,960$34.56M0.1%-11.6%1.882%
1/9/2026 SG Americas Securities LLC10,691$440K0.0%N/A0.024%
11/26/2025 JPMorgan Chase & Co.1,978,626$58.19M0.0%-10.9%4.433%
11/17/2025Millennium Management LLC214,085$6.30M0.0%+1,425.5%0.480%
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.5,643$166K0.0%-16.4%0.013%
11/17/2025Jain Global LLC8,513$250K0.0%N/A0.019%
11/17/2025Citadel Advisors LLC35,923$1.06M0.0%-72.3%0.080%
11/17/2025Bank of America Corp DE6,541$192K0.0%+8.8%0.015%
11/17/2025Braidwell LP314,013$9.24M0.3%-71.0%0.704%
11/17/2025Ameriprise Financial Inc.153,151$4.50M0.0%-35.3%0.343%
11/14/2025Longaeva Partners L.P.61,457$1.81M0.3%N/A0.138%
11/14/2025Squarepoint Ops LLC10,162$299K0.0%N/A0.023%
11/14/2025Atlas Venture Life Science Advisors LLC3,615,527$106.33M14.1%-2.1%8.101%
11/13/2025 UBS Group AG46,666$1.37M0.0%-9.2%0.105%
11/13/2025 BNP Paribas Financial Markets2,380$70K0.0%+35.2%0.005%
11/13/2025 Franklin Resources Inc.242,147$7.12M0.0%-51.6%0.543%
11/13/2025 Legal & General Group Plc7,374$217K0.0%+436.7%0.017%
11/13/2025 Russell Investments Group Ltd.1,022$30K0.0%N/A0.002%
11/12/2025 Intech Investment Management LLC7,486$220K0.0%N/A0.017%
11/10/2025 TD Asset Management Inc87,082$2.56M0.0%+74.3%0.195%
11/10/2025 China Universal Asset Management Co. Ltd.5,000$147K0.0%N/A0.011%
11/7/2025Vanguard Group Inc.1,143,154$33.62M0.0%+81.4%2.590%
11/7/2025 JPMorgan Chase & Co.1,978,626$58.19M0.0%-10.9%4.483%
11/6/2025 Rhumbline Advisers17,240$507K0.0%-2.4%0.039%
11/3/2025 New York State Common Retirement Fund5,300$156K0.0%-22.1%0.012%
8/15/2025Soleus Capital Management L.P.376,000$6.52M0.4%+56.7%0.852%
8/15/2025Perceptive Advisors LLC1,216,045$21.10M1.9%-2.8%2.755%
8/15/2025 BNP Paribas Financial Markets1,761$31K0.0%N/A0.004%
8/15/2025Braidwell LP1,081,855$18.77M0.6%N/A2.451%
8/15/2025Bank of America Corp DE6,012$104K0.0%-31.2%0.014%
8/15/2025Ameriprise Financial Inc.236,813$4.11M0.0%+13.2%0.537%
8/14/2025Viking Global Investors LP3,195,181$55.44M0.2%+8.2%7.239%
8/14/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.6,747$117K0.0%N/A0.015%
8/14/2025The Manufacturers Life Insurance Company 38,038$660K0.0%+13.4%0.086%
8/13/2025 Bosun Asset Management LLC16,975$295K0.1%N/A0.038%
8/13/2025 New York State Common Retirement Fund6,800$118K0.0%N/A0.015%
8/13/2025Virtus Investment Advisers LLC5,535$96K0.0%N/A0.013%
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8/12/2025 Prudential Financial Inc.135,185$2.35M0.0%+114.6%0.306%
8/12/2025 Rhumbline Advisers17,670$307K0.0%N/A0.040%
8/12/2025 JPMorgan Chase & Co.2,221,188$38.54M0.0%+2.4%5.034%
8/8/2025 Police & Firemen s Retirement System of New Jersey2,608$45K0.0%N/A0.006%
8/8/2025Geode Capital Management LLC289,275$5.02M0.0%+113.4%0.656%
8/1/2025 Jennison Associates LLC752,800$13.06M0.0%-12.5%1.706%
7/28/2025 TD Asset Management Inc49,966$867K0.0%-9.8%0.113%
7/24/2025 Aberdeen Group plc950,547$16.49M0.0%+27.4%2.154%
6/27/2025Goldman Sachs Group Inc.63,741$667K0.0%N/A0.144%
5/23/2025Siren L.L.C.325,000$3.40M0.2%N/A0.737%


SION Institutional Ownership - Frequently Asked Questions

During the previous two years, 76 institutional investors and hedge funds held shares of Sionna Therapeutics. The most heavily invested institutionals were RA Capital Management L.P. ($407.49M), Orbimed Advisors LLC ($146.53M), Atlas Venture Life Science Advisors LLC ($123.24M), TPG GP A LLC ($69.93M), Jennison Associates LLC ($58.18M), Viking Global Investors LP ($55.44M), and JPMorgan Chase & Co. ($50.68M).Learn more on Sionna Therapeutics' institutional investors.

Of the 70 institutional investors that purchased Sionna Therapeutics' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: RA Capital Management L.P. ($10.45M), TPG GP A LLC ($6.68M), Atlas Venture Life Science Advisors LLC ($3.69M), Jennison Associates LLC ($1.31M), Braidwell LP ($1.08M), Aberdeen Group plc ($950.55K), and Siren L.L.C. ($650K).

Institutional investors have bought a total of 25,194,356 shares in the last 24 months. This purchase volume represents approximately $390.31M in transactions.

Of the 23 institutional investors that sold Sionna Therapeutics' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: JPMorgan Chase & Co. ($1.23M), Braidwell LP ($767.84K), Atlas Venture Life Science Advisors LLC ($698.42K), RA Capital Management L.P. ($540.28K), Franklin Resources Inc. ($324.54K), Orbimed Advisors LLC ($143.30K), and Millennium Management LLC ($133.54K).

Institutional investors have sold a total of 4,366,855 shares in the last 24 months. This volume of shares sold represents approximately $155.26M in transactions.


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This page (NASDAQ:SION) was last updated on 5/15/2026 by MarketBeat.com Staff.
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