SION Sionna Therapeutics, Inc.
Sionna Therapeutics, Inc. (SION) Institutional Ownership
What the institutions did with SION last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended September 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| Y-Intercept (Hong Kong) Ltd | 1.1M | 37.1% |
| ACADIAN ASSET MANAGEMENT LLC | 554.0K | 19.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 539.5K | 18.9% |
| CITIGROUP INC | 134.0K | 4.7% |
| Caitong International Asset Management Co., Ltd | 88.6K | 3.1% |
| ALPS ADVISORS INC | 59.5K | 2.1% |
| Nuveen, LLC | 53.2K | 1.9% |
| DIMENSIONAL FUND ADVISORS LP | 52.0K | 1.8% |
| Bank of New York Mellon Corp | 46.3K | 1.6% |
| BARCLAYS PLC | 46.0K | 1.6% |
| Creative Planning | 43.4K | 1.5% |
| FMR LLC | 21.2K | 0.7% |
| State of Alaska, Department of Revenue | 20.0K | 0.7% |
| DEUTSCHE BANK AG\ | 16.7K | 0.6% |
| Russell Investments Group, Ltd. | 15.7K | 0.6% |
| M&T Bank Corp | 13.8K | 0.5% |
| SIMPLEX TRADING, LLC | 13.2K | 0.5% |
| Squarepoint Ops LLC | 13.0K | 0.5% |
| PRINCIPAL FINANCIAL GROUP INC | 11.3K | 0.4% |
| Chicago Partners Investment Group LLC | 10.7K | 0.4% |
| China Universal Asset Management Co., Ltd. | 8.2K | 0.3% |
| GF FUND MANAGEMENT CO. LTD. | 6.7K | 0.2% |
| Aberdeen Group plc | 6.5K | 0.2% |
| Police & Firemen's Retirement System of New Jersey | 5.4K | 0.2% |
| STRS OHIO | 4.9K | 0.2% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Y-Intercept (Hong Kong) Ltd | New | 0 | 1.1M | +1.1M |
| ACADIAN ASSET MANAGEMENT LLC | New | 0 | 554.0K | +554.0K |
| Aberdeen Group plc | Reduced | 284.1K | 6.5K | -277.7K |
| FMR LLC | Reduced | 278.3K | 21.2K | -257.1K |
| Candriam S.C.A. | Sold Out | 233.2K | 0 | -233.2K |
| Caitong International Asset Management Co., Ltd | Increased | 31 | 88.6K | +88.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 457.1K | 539.5K | +82.4K |
| DIMENSIONAL FUND ADVISORS LP | New | 0 | 52.0K | +52.0K |
| Creative Planning | New | 0 | 43.4K | +43.4K |
| BARCLAYS PLC | Increased | 6.5K | 46.0K | +39.5K |
| DEUTSCHE BANK AG\ | Reduced | 53.4K | 16.7K | -36.6K |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC | Sold Out | 36.0K | 0 | -36.0K |
| Russell Investments Group, Ltd. | Reduced | 42.3K | 15.7K | -26.6K |
| CITIGROUP INC | Increased | 110.2K | 134.0K | +23.8K |
| State of Alaska, Department of Revenue | New | 0 | 20.0K | +20.0K |
| ALPS ADVISORS INC | Increased | 45.5K | 59.5K | +14.0K |
| M&T Bank Corp | New | 0 | 13.8K | +13.8K |
| SIMPLEX TRADING, LLC | New | 0 | 13.2K | +13.2K |
| Nuveen, LLC | Increased | 41.3K | 53.2K | +11.9K |
| PRINCIPAL FINANCIAL GROUP INC | New | 0 | 11.3K | +11.3K |
| Chicago Partners Investment Group LLC | New | 0 | 10.7K | +10.7K |
| PROFUND ADVISORS LLC | Sold Out | 9.1K | 0 | -9.1K |
| Squarepoint Ops LLC | Increased | 5.4K | 13.0K | +7.6K |
| GF FUND MANAGEMENT CO. LTD. | Increased | 946 | 6.7K | +5.7K |
| INTECH INVESTMENT MANAGEMENT LLC | Sold Out | 5.2K | 0 | -5.2K |
| AlphaCentric Advisors LLC | Sold Out | 4.9K | 0 | -4.9K |
| Bank of New York Mellon Corp | Increased | 41.6K | 46.3K | +4.7K |
| STRS OHIO | Increased | 3.5K | 4.9K | +1.4K |
| Pinnacle Wealth Planning Services, Inc. | New | 0 | 1.4K | +1.4K |
| China Universal Asset Management Co., Ltd. | Increased | 7.2K | 8.2K | +1.1K |
| GAMMA Investing LLC | Increased | 244 | 925 | +681 |
| State of Wyoming | Reduced | 804 | 262 | -542 |
| Sterling Capital Management LLC | Increased | 65 | 605 | +540 |
| US BANCORP \DE\ | Increased | 104 | 638 | +534 |
| Farther Finance Advisors, LLC | Increased | 196 | 716 | +520 |
| SJS Investment Consulting Inc. | Increased | 9 | 416 | +407 |
| PNC Financial Services Group, Inc. | Increased | 5 | 388 | +383 |
| EverSource Wealth Advisors, LLC | Increased | 20 | 387 | +367 |
| Essential Partners LLC | New | 0 | 326 | +326 |
| Mirae Asset Global Investments Co., Ltd. | Increased | 2.0K | 2.3K | +291 |
| SIGNATUREFD, LLC | New | 0 | 226 | +226 |
| Bare Financial Services, Inc | Increased | 37 | 224 | +187 |
| True Wealth Design, LLC | New | 0 | 165 | +165 |
| Owl Creek Wealth Partners LLC | New | 0 | 160 | +160 |
| Provenance Wealth Advisors, LLC | New | 0 | 116 | +116 |
| Hurley Capital, LLC | Sold Out | 113 | 0 | -113 |
| Root Financial Partners, LLC | New | 0 | 80 | +80 |
| Physician Wealth Advisors, Inc. | New | 0 | 70 | +70 |
| NISA INVESTMENT ADVISORS, LLC | Reduced | 385 | 342 | -43 |
| Clearstead Advisors, LLC | New | 0 | 33 | +33 |
| Hughes Financial Services, LLC | Sold Out | 25 | 0 | -25 |
| Allworth Financial LP | Increased | 1 | 23 | +22 |
| IFP Advisors, Inc | New | 0 | 18 | +18 |
| Fortitude Family Office, LLC | Sold Out | 15 | 0 | -15 |
| Ascentis Wealth Management, LLC | New | 0 | 10 | +10 |
| Covestor Ltd | Reduced | 12 | 7 | -5 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.