GLSI · NASDAQ · Biotechnology

Greenwich LifeSciences (GLSI)

Runs a single Phase III trial for a peptide vaccine preventing HER2-positive breast cancer recurrence.

$17.51
After hours−0.02 (−0.11%)
At close$17.53(−10.01%)

13F · 13D/G · Form 4

Institutions11.61%1.70M shares
60 holders · as of Jun 30, 2026
Insiders78.15%11.47M shares
4 holders · as of Jul 30, 2026
Other10.24%1.50M shares
remainder

14.68M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

13F · 13D/G · Form 4

HolderStakeSharesDate
Snehal Patel1Insiderdirector, 10 percent owner, officer: CEO and CFO
56.42%7.78Mfiled Jul 30, 2026
WeinerInsider
15.70%2.30Mfiled Jun 22, 2022
David McWilliamsInsiderdirector
4.23%620,301filed Dec 16, 2021
BlackRock, Inc.Institution
3.31%485,854as of Jun 30, 2026
Vanguard Capital Management LLCInstitution
1.90%278,190as of Jun 30, 2026
Jaye ThompsonInsiderofficer: VP Clinical Reg Affairs
1.80%264,148filed Nov 25, 2024
Geode Capital Management, LLCInstitution
1.15%168,179as of Jun 30, 2026
State Street CorpInstitution
0.97%143,086as of Jun 30, 2026
Vanguard Portfolio Management LLCInstitution
0.55%80,861as of Jun 30, 2026
Northern Trust CorpInstitution
0.55%80,228as of Jun 30, 2026
Bank of New York Mellon CorpInstitution
0.33%47,900as of Jun 30, 2026
Vanguard Fiduciary Trust CoInstitution
0.31%45,965as of Jun 30, 2026
Morgan StanleyInstitution
0.30%43,447as of Jun 30, 2026
Goldman Sachs Group IncInstitution
0.27%39,329as of Jun 30, 2026
Russell Investments Group, Ltd.Institution
0.23%34,353as of Jun 30, 2026
Jane Street Group, LLCInstitution
0.19%27,694as of Jun 30, 2026
UBS Group AGInstitution
0.16%23,409as of Jun 30, 2026
State of Wisconsin Investment BoardInstitution
0.15%22,639as of Jun 30, 2026
Gsa Capital Partners LLPInstitution
0.13%19,543as of Jun 30, 2026
Massachusetts Financial Services Co /MA/Institution
0.12%17,922as of Jun 30, 2026
STRS OhioInstitution
0.12%17,800as of Jun 30, 2026
Charles Schwab Investment Management IncInstitution
0.12%17,098as of Jun 30, 2026
Sixth Street Partners Management Company, L.P.Institution
0.12%17,098as of Jun 30, 2026
Vanguard Global Advisers, LLCInstitution
0.08%11,871as of Jun 30, 2026
Ancora Advisors, LLCInstitution
0.07%10,740as of Jun 30, 2026
  1. Snehal Patel's transaction reports restate only vehicles that traded; the 2020 ownership statement (7.78M) plus the 504.0K net shares acquired since is used instead.

13F, as of Jun 30, 2026

60 holders · 1.70M shares · 10 new positions · 33 increased · 15 reduced · 13 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.485.9K3.31%+52.0KAug 7, 2026
Vanguard Capital Management LLC278.2K1.90%−20.1KAug 13, 2026
Geode Capital Management, LLC168.2K1.15%+12.7KAug 12, 2026
State Street Corp143.1K0.97%+9.2KAug 7, 2026
Vanguard Portfolio Management LLC80.9K0.55%+22.0KAug 13, 2026
Northern Trust Corp80.2K0.55%+5.1KAug 13, 2026
Bank of New York Mellon Corp47.9K0.33%+1.4KAug 6, 2026
Vanguard Fiduciary Trust Co46.0K0.31%+1.1KAug 13, 2026

13D/G · 5% or more, as filed

No 13D/G filer at 5% or more on record.

Form 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Jul 28, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase1,500$13.595,610,702
Jul 29, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase700$13.105,611,402
Jul 27, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase1,500$13.625,609,202
Jul 23, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase2,500$13.145,606,602
Jul 24, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase1,100$12.885,607,702
Jan 13, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase1,800$29.835,604,102
Jan 12, 2026
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase2,900$27.545,602,302
Dec 31, 2025
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase4,300$21.365,599,402
Dec 30, 2025
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase2,900$21.735,595,102
Dec 18, 2025
Snehal Pateldirector, 10 percent owner, officer: CEO and CFO
Purchase4,100$12.625,592,202

House and Senate disclosures

Not reported.