Serina Therapeutics, Inc.
SER- Exchange
- NYSE
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001708599
No open-market purchases or sales by Serina Therapeutics, Inc. insiders were filed in the last 90 days; 27 institutions reported holding it in 13F filings for Q2 2026, worth $2.73M in total; no superinvestor holds it.
Holders of 5% or more of SER
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Serina Therapeutics, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Juvenescence Ltd | 13D/A | 27.30%4.40M shares | – | Jan 12, 202133 filings | Jul 22, 2026 | SEC |
| Sio Capital Management, LLC | 13G/A | 7.87%2.00M shares | +1.16 ppfrom 6.71% | May 4, 20262 filings | Nov 3, 2026 | SEC |
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
37 Schedule 13D and 13G filings on Serina Therapeutics, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 3, 20263:44 PM ET | Sio Capital Management, LLC | 13G/A | 7.87%2.00M shares | +1.16 ppfrom 6.71% | Sep 30, 2026 | SEC |
| Jul 22, 202612:12 PM ET | Juvenescence Ltdand 1 other | 13D/A | 27.30%4.40M shares | – | Mar 20, 2026 | SEC |
| May 4, 20264:15 PM ET | Sio Capital Management, LLC | 13G | 6.71%1.00M shares | New | Mar 31, 2026 | SEC |
| Dec 9, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Nov 14, 2024 | Broadwood Partners, L.P. | 13G/AOld format | – | – | – | SEC |
| Jul 5, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Apr 3, 2024 | Moreadith Randall | 13DOld format | – | New | – | SEC |
| Mar 26, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Mar 7, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 5, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Jan 17, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Jan 9, 2024 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Dec 13, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Nov 16, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Nov 1, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Aug 24, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Apr 12, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Mar 22, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 17, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Jan 27, 2023 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Dec 15, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Oct 25, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Aug 23, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Jun 24, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Apr 11, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 22, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 14, 2022 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Dec 13, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Nov 18, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Nov 2, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Sep 14, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| May 26, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| May 11, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 17, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Feb 9, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
| Jan 12, 2021 | Juvenescence Ltd | 13D/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
3 notices from officers, directors and other affiliates planning to sell Serina Therapeutics, Inc. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Jan 20, 20264:20 PM ET | Moreadith RandallOfficer | 91.0K | $279.4K | Jan 20, 202610b5-1 | Stifel Nicolaus & Company Inc | SEC |
| Oct 14, 20254:48 PM ET | Moreadith RandallOfficer | 88.8K | $530.2K | Oct 13, 202510b5-1 | Stifel Nicolaus & Company Inc | SEC |
| Jun 30, 20254:28 PM ET | Moreadith RandallOfficer | 99.7K | $576.1K | Jun 30, 202510b5-1 | Stifel Nicolaus & Company Inc | SEC |