Who owns SOMN (SOMN)
Which tracked institutional funds hold SOMN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See SOMN company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on SOMN is one-sided between 2025-Q4 and 2026-Q1: 688 added or opened and 169 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
SOMN’s largest tracked holder by dollar value, VANGUARD GROUP INC, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.2% of theirs — a 0.0pp gap the other way — the median holder sizes SOMN more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in SOMN divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 2346 tracked filers holding SOMN, 1201 increased or opened the position and 931 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in SOMN between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 68
- VANGUARD CAPITAL MANAGEMENT LLC$6.9B
- VANGUARD PORTFOLIO MANAGEMENT LLC$2.5B
- VANGUARD FIDUCIARY TRUST CO$598M
- Vanguard Global Advisers, LLC$233M
- VANGUARD ASSET MANAGEMENT, Ltd$200M
- ADAGE CAPITAL PARTNERS GP, L.L.C.$115M
Full exits 54
- VANGUARD GROUP INC$9.4B
- FORSTA AP-FONDEN$36M
- Brandywine Global Investment Management, LLC$24M
- COMERICA BANK$19M
- CIBC WORLD MARKETS CORP$14M
- TUDOR INVESTMENT CORP ET AL$13M
Largest adds
- Capital World Investors$1.9B
- STATE STREET CORP$716M
- BlackRock, Inc.$569M
- PRICE T ROWE ASSOCIATES INC /MD/$511M
- GEODE CAPITAL MANAGEMENT, LLC$370M
- FRANKLIN RESOURCES INC$330M
Largest trims
- JPMORGAN CHASE & CO$1.2B
- Capital International Investors$847M
- Soroban Capital Partners LP$348M
- NORGES BANK$132M
- Squarepoint Ops LLC$105M
- NewEdge Advisors, LLC$93M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 84,438,066 | $8.1B | 11.5% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 71,539,145 | $6.9B | 9.8% | 2026-Q1 |
| STATE STREET CORP added | 62,980,088 | $6.1B | 8.6% | 2026-Q1 |
| Capital World Investors added | 56,239,873 | $5.4B | 7.7% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 36,425,526 | $3.5B | 5.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 28,355,049 | $2.8B | 3.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 26,136,857 | $2.5B | 3.6% | 2026-Q1 |
| FMR LLC trimmed | 22,837,569 | $2.2B | 3.1% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 15,595,800 | $1.5B | 2.1% | 2026-Q1 |
| MORGAN STANLEY trimmed | 12,915,066 | $1.2B | 1.8% | 2026-Q1 |
| NORGES BANK trimmed | 10,654,855 | $980M | 1.4% | 2026-Q1 |
| NORTHERN TRUST CORP added | 9,827,426 | $949M | 1.3% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 8,753,175 | $845M | 1.2% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 8,380,592 | $809M | 1.1% | 2026-Q1 |
| Legal & General Group Plc trimmed | 7,848,282 | $758M | 1.1% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 7,278,616 | $703M | 1.0% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 7,111,271 | $686M | 1.0% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 6,197,084 | $598M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 5,841,923 | $564M | 0.8% | 2026-Q1 |
| Invesco Ltd. added | 5,430,745 | $524M | 0.7% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 5,173,525 | $499M | 0.7% | 2026-Q1 |
| BARCLAYS PLC added | 4,564,491 | $441M | 0.6% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 4,513,734 | $436M | 0.6% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 4,254,837 | $411M | 0.6% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 4,236,493 | $409M | 0.6% | 2026-Q1 |
| UBS Group AG trimmed | 4,076,352 | $393M | 0.6% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 6,748,819 | $347M | 0.5% | 2026-Q1 |
| Mawer Investment Management Ltd. added | 3,421,757 | $330M | 0.5% | 2026-Q1 |
| Amundi added | 3,324,416 | $321M | 0.5% | 2026-Q1 |
| Swiss National Bank added | 3,231,400 | $312M | 0.4% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 3,152,402 | $304M | 0.4% | 2026-Q1 |
| LPL Financial LLC added | 3,070,673 | $296M | 0.4% | 2026-Q1 |
| National Pension Service trimmed | 2,878,867 | $278M | 0.4% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 2,655,044 | $256M | 0.4% | 2026-Q1 |
| Capital Research Global Investors added | 2,614,540 | $252M | 0.4% | 2026-Q1 |
| CITIGROUP INC added | 2,613,850 | $252M | 0.4% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 2,500,709 | $241M | 0.3% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 2,445,718 | $236M | 0.3% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 2,439,489 | $235M | 0.3% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 2,409,631 | $233M | 0.3% | 2026-Q1 |
| Soroban Capital Partners LP trimmed | 2,375,511 | $229M | 0.3% | 2026-Q1 |
| MARSHALL WACE, LLP added | 2,334,078 | $225M | 0.3% | 2026-Q1 |
| Ensign Peak Advisors, Inc trimmed | 2,256,022 | $218M | 0.3% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 2,117,270 | $204M | 0.3% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 2,098,404 | $203M | 0.3% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 2,069,243 | $200M | 0.3% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS trimmed | 1,955,065 | $189M | 0.3% | 2026-Q1 |
| JENNISON ASSOCIATES LLC added | 1,930,415 | $186M | 0.3% | 2026-Q1 |
| Pinnacle Financial Partners, Inc. added | 1,923,892 | $186M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 1,922,471 | $186M | 0.3% | 2026-Q1 |
| HSBC HOLDINGS PLC trimmed | 1,750,054 | $169M | 0.2% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ trimmed | 1,721,982 | $166M | 0.2% | 2026-Q1 |
| Energy Income Partners, LLC trimmed | 1,716,842 | $166M | 0.2% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 1,713,552 | $165M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC added | 1,590,591 | $154M | 0.2% | 2026-Q1 |
| Empower Advisory Group, LLC added | 1,583,291 | $153M | 0.2% | 2026-Q1 |
| HighTower Advisors, LLC trimmed | 1,515,829 | $146M | 0.2% | 2026-Q1 |
| Focus Partners Wealth added | 1,462,181 | $141M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 1,445,765 | $140M | 0.2% | 2026-Q1 |
| CONFLUENCE INVESTMENT MANAGEMENT LLC trimmed | 1,421,871 | $137M | 0.2% | 2026-Q1 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE added | 1,386,221 | $134M | 0.2% | 2026-Q1 |
| Capital International Investors trimmed | 1,383,809 | $134M | 0.2% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 1,276,908 | $123M | 0.2% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 1,186,900 | $115M | 0.2% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 1,177,177 | $114M | 0.2% | 2026-Q1 |
| NATIXIS ADVISORS, LLC added | 1,146,471 | $111M | 0.2% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 1,123,642 | $108M | 0.2% | 2026-Q1 |
| Calamos Advisors LLC added | 2,081,325 | $107M | 0.2% | 2026-Q1 |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO trimmed | 1,073,294 | $104M | 0.1% | 2026-Q1 |
| Vanguard Investments Australia, Ltd. new | 1,070,491 | $103M | 0.1% | 2026-Q1 |
| STIFEL FINANCIAL CORP trimmed | 1,055,529 | $102M | 0.1% | 2026-Q1 |
| NEW YORK STATE COMMON RETIREMENT FUND | 1,051,575 | $101M | 0.1% | 2026-Q1 |
| CAPITAL ADVISORS INC/OK added | 1,039,289 | $100M | 0.1% | 2026-Q1 |
| ZACKS INVESTMENT MANAGEMENT trimmed | 1,037,477 | $100M | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 1,032,812 | $100M | 0.1% | 2026-Q1 |
| TRUIST FINANCIAL CORP added | 971,154 | $94M | 0.1% | 2026-Q1 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 960,839 | $93M | 0.1% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 1,045,460 | $91M | 0.1% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 894,897 | $86M | 0.1% | 2026-Q1 |
| COMMONWEALTH EQUITY SERVICES, LLC added | 890,580 | $86M | 0.1% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 866,507 | $84M | 0.1% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM added | 864,770 | $83M | 0.1% | 2026-Q1 |
| Korea Investment CORP trimmed | 840,022 | $81M | 0.1% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 834,955 | $81M | 0.1% | 2026-Q1 |
| Cetera Investment Advisers added | 798,489 | $77M | 0.1% | 2026-Q1 |
| Mitsubishi UFJ Trust & Banking Corp added | 794,154 | $77M | 0.1% | 2026-Q1 |
| JONES FINANCIAL COMPANIES LLLP added | 792,024 | $76M | 0.1% | 2026-Q1 |
| Welch Group, LLC added | 782,791 | $76M | 0.1% | 2026-Q1 |
| CBRE INVESTMENT MANAGEMENT LISTED REAL ASSETS LLC added | 745,127 | $72M | 0.1% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 742,958 | $72M | 0.1% | 2026-Q1 |
| MACQUARIE GROUP LTD trimmed | 740,742 | $71M | 0.1% | 2026-Q1 |
| Bank Julius Baer & Co. Ltd, Zurich added | 734,266 | $71M | 0.1% | 2026-Q1 |
| OLD REPUBLIC INTERNATIONAL CORP | 711,900 | $69M | 0.1% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 703,486 | $68M | 0.1% | 2026-Q1 |
| COHEN & STEERS, INC. | 691,562 | $67M | 0.1% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 682,724 | $66M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC added | 108,057,225 | $9.4B | 13.3% | 2025-Q4 stale |
| SYNOVUS FINANCIAL CORP trimmed | 1,688,686 | $160M | 0.2% | 2025-Q3 stale |
| MIZUHO MARKETS AMERICAS LLC | 933,700 | $88M | 0.1% | 2025-Q3 stale |
| Stonegate Investment Group, LLC added | 892,989 | $85M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.