Ranked by reported Q4 2025 13F market value
Share of total reported institutional value in SONN held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Formidable Asset Management, LLC | 37K | $170K | — | 1.116% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SONN — a direct measure of their conviction.
Filings activity in SONN during Q4 2025, grouped by how each filer changed its position.
Institutions that opened a new SONN position in Q4 2025
Institutions that fully closed their SONN position in Q4 2025
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q4 2025 | 1 | 97% | 4.06% | 195.93 pp | $0M | 100% |
| Q3 2025 | 29 | +190% | 199.99% | +194.66 pp | $110M | +49238% |
| Q2 2025 | 10 | +11% | 5.33% | +0.18 pp | $0M | +3.5% |
| Q1 2025 | 9 | 10% | 5.15% | +3.43 pp | $0M | +199% |
| Q4 2024 | 10 | +150% | 1.72% | +1.65 pp | $0M | +2334% |
| Q3 2024 | 4 | 67% | 0.07% | 12.29 pp | $0M | 99% |
| Q2 2024 | 12 | +9.1% | 12.36% | +10.03 pp | $1M | +431% |
| Q1 2024 | 11 | — | 2.33% | — | $0M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SONN stock.
Based on Q4 2025 13F filings, institutional ownership of Sonnet BioTherapeutics Holdings, Inc. stands at 4.1%, held across 1 reporting institutions.
Formidable Asset Management, LLC is the largest reported institutional holder of SONN, with approximately 37,185 shares worth $0.00B as of Q4 2025.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of SONN.
Our composite Smart Money Score for SONN is 5 out of 100 (Heavy Distribution). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
1 institutions opened new positions in SONN during Q4 2025, while 29 fully exited. 0 added to existing positions and 0 trimmed.
SONN institutional ownership fell by 195.93 percentage points quarter-over-quarter, with a net change of -28 holders.
The top 10 institutions account for 100.0% of all reported 13F value in SONN, and the top 25 account for 100.0%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Sonnet BioTherapeutics Holdings, Inc. (SONN) Institutional Ownership