Greenwich LifeSciences GLSI Institutional Ownership

NASDAQ GLSI

$17.20 -0.85 (-4.71%)

As of: Oct 1, 2026 · 10:41 AM EDT

Institutions by Trading Activity

60 Institutions

Increased 33 55.0%

Unchanged 12 20.0%

Reduced 15 25.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

11.70%

▼-0.07 pp QoQ

Shares Held by Institutions

1.70Mn

of 14.57Mn outstanding

▲+11.26% QoQ

Shares Outstanding

14.57Mn

12.86Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-4 vs prior quarter

Net Shares Added (QoQ)

+172.46K

accumulated since last quarter

Value of Holdings

$30.76Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Greenwich LifeSciences, Inc. (NASDAQ:GLSI) has 60 institutional investors that have filed 13F reports for the period ending June 2026.

These investors collectively held 11.7% of Greenwich LifeSciences's outstanding shares in June 2026, down from 11.8% in March 2026.
They increased total shares held in Greenwich LifeSciences by 11.26% from the prior quarter, while the number of investors in GLSI increased 22.45% year over year.
Of these 60 holders, 33 added to their stakes in Greenwich LifeSciences, 15 trimmed positions, and 12 made no changes.
In total, institutional investors held 1.7Mn shares in Greenwich LifeSciences as of June 2026, up by 172.46K shares quarter on quarter, and up 498.17K shares year over year.
As of June 30, 2026, BlackRock, Inc. held the largest stake in Greenwich LifeSciences with 485.85K shares, accounting for 3.34% of total shares outstanding.
Leading buyers of Greenwich LifeSciences shares for the quarter ending June 2026 were BlackRock, Inc. (51.99K), JANE STREET GROUP, LLC (27.69K), VANGUARD PORTFOLIO MANAGEMENT LLC (21.95K), GSA CAPITAL PARTNERS LLP (19.54K), MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (17.92K).
The largest sales of GLSI for the quarter ending June 2026 came from Ancora Advisors LLC (26.76K), VANGUARD CAPITAL MANAGEMENT LLC (20.08K), Russell Investments Group, Ltd. (5.34K), EverSource Wealth Advisors, LLC (1.98K), Raymond James Financial Inc (700).
Business Quant data shows the 10 biggest positions in Greenwich LifeSciences as of June 2026 are held by BlackRock, Inc. (485.85K), VANGUARD CAPITAL MANAGEMENT LLC (278.19K), GEODE CAPITAL MANAGEMENT, LLC (168.18K), State Street Corp (143.09K), VANGUARD PORTFOLIO MANAGEMENT LLC (80.86K), Northern Trust Corp (80.23K), Bank of New York Mellon Corp (47.9K), VANGUARD FIDUCIARY TRUST CO (45.96K), Morgan Stanley (43.45K), Goldman Sachs Group Inc (39.33K).

Form 13F Holdings

60 Institutional Holders

Report period 30 Jun, 2026

Total shares held 1.70Mn

Of outstanding 11.70%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	485,854	3.34%	▲51,994	+11.98%	$11.40Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	278,190	1.91%	▼20,076	-6.73%	$6.53Mn
3	GEODE CAPITAL MANAGEMENT, LLC	0001214717	168,179	1.15%	▲12,713	+8.18%	$3.95Mn
4	State Street Corp	0000093751	143,086	0.98%	▲9,211	+6.88%	$3.36Mn
5	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	80,861	0.56%	▲21,950	+37.26%	$1.90Mn
6	Northern Trust Corp	0000073124	80,228	0.55%	▲5,103	+6.79%	$1.88Mn
7	Bank of New York Mellon Corp	0001390777	47,900	0.33%	▲1,377	+2.96%	$1.12Mn
8	VANGUARD FIDUCIARY TRUST CO	0000933478	45,965	0.32%	▲1,057	+2.35%	$1.08Mn
9	Morgan Stanley	0000895421	43,447	0.30%	▲13,620	+45.66%	$1.02Mn
10	Goldman Sachs Group Inc	0000886982	39,329	0.27%	▼192	-0.49%	$922.66K
11	Russell Investments Group, Ltd.	0001692234	34,353	0.24%	▼5,344	-13.46%	$805.94K
12	JANE STREET GROUP, LLC	0001595888	27,694	0.19%	▲27,694	0.00%	$649.70K
13	UBS Group AG	0001610520	23,409	0.16%	▲2,293	+10.86%	$549.18K
14	STATE OF WISCONSIN INVESTMENT BOARD	0000854157	22,639	0.16%	▲2,300	+11.31%	$531.11K
15	GSA CAPITAL PARTNERS LLP	0001362033	19,543	0.13%	▲19,543	0.00%	$458
16	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0000912938	17,922	0.12%	▲17,922	0.00%	$420.45K
17	STRS OHIO	0000820478	17,800	0.12%	▲4,100	+29.93%	$417.59K
18	Sixth Street Partners Management Company, L.P.	0001812095	17,098	0.12%	▲17,098	0.00%	$401.12K
18	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	17,098	0.12%	▲495	+2.98%	$401.12K
19	Vanguard Global Advisers, LLC	0001811242	11,871	0.08%	▲1,536	+14.86%	$278.49K

Showing 1 to 20 of 60 holders