Sonnet BioTherapeutics Holdings, Inc.
SONNDelisted Dec 2, 2025- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001106838
Sonnet BioTherapeutics Holdings, Inc. was delisted on Dec 2, 2025; its insiders filed their last Form 4 on Dec 4, 2025; 27 institutions reported holding it in 13F filings for Q3 2025, worth $3.53M in total; no superinvestor held it.
Holders of 5% or more of SONN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Sonnet BioTherapeutics Holdings, Inc., largest stake first. The change is against the holder's previous filing.
No holder currently reports owning 5% or more of Sonnet BioTherapeutics Holdings, Inc. on Schedule 13D or 13G.
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
5 Schedule 13D and 13G filings on Sonnet BioTherapeutics Holdings, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jul 25, 20254:15 PM ET | Republic Digital Opportunistic Digital Assets Master Fund, Ltd.and 1 other | 13G | 4.20%260.0K shares | NewBelow 5% | Jul 14, 2025 | SEC |
| Jan 2, 2024 | Markey John | 13G/AOld format | – | – | – | SEC |
| Nov 17, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| Nov 6, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| Aug 7, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| Jul 17, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| Jul 7, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| Jun 30, 2023 | Markey John | 13GOld format | – | – | – | SEC |
| Jun 22, 2023 | Ruck Matthew J | 13G/AOld format | – | – | – | SEC |
| Jun 14, 2023 | Ruck Matthew J | 13G/AOld format | – | – | – | SEC |
| Jun 14, 2023 | Ruck Matthew J | 13G/AOld format | – | – | – | SEC |
| Jun 12, 2023 | Markey John | 13GOld format | – | – | – | SEC |
| Jun 9, 2023 | Ruck Matthew J | 13GOld format | – | New | – | SEC |
| May 26, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| May 17, 2023 | Markey John | 13G/AOld format | – | – | – | SEC |
| May 2, 2023 | Markey John | 13GOld format | – | New | – | SEC |
| Feb 10, 2023 | Hudson Bay Capital Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 3, 2022 | Hudson Bay Capital Management LP | 13GOld format | – | New | – | SEC |
| Mar 10, 2021 | Mohan Pankaj | 13GOld format | – | New | – | SEC |
| Feb 16, 2021 | Altium Capital Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 16, 2021 | Arena Investors LP | 13G/AOld format | – | – | – | SEC |
| Jan 26, 2021 | Empery Asset Management, LP | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Sonnet BioTherapeutics Holdings, Inc. shares.
No Form 144 notices for Sonnet BioTherapeutics Holdings, Inc. are on file.