Hydrofarm Holdings HYFM Institutional Ownership

NASDAQ HYFM

$0.94 -0.02 (-2.06%)

As of: Oct 1, 2026 · 3:59 PM EDT

Institutions by Trading Activity

23 Institutions

Increased 7 30.4%

Unchanged 12 52.2%

Reduced 4 17.4%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

6.65%

▼-0.17 pp QoQ

Shares Held by Institutions

317.77K

of 4.78Mn outstanding

▲+1.51% QoQ

Shares Outstanding

4.78Mn

4.46Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+2 vs prior quarter

Net Shares Added (QoQ)

+4.74K

accumulated since last quarter

Value of Holdings

$305.06K

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

Hydrofarm Holdings Group, Inc. (NASDAQ:HYFM) appears in 23 institutional 13F filings for the quarter ending June 2026.

They owned 6.7% of outstanding stock in June 2026, down from 6.8% the prior quarter.
They increased total shares held in Hydrofarm Holdings by 1.51% from the prior quarter, while the number of investors in HYFM decreased 8.0% year over year.
Of these 23 holders, 7 added to their stakes in Hydrofarm Holdings, 4 trimmed positions, and 12 made no changes.
Altogether, these fund groups held 317.77K shares in HYFM by June 2026, up by 4.74K shares quarter on quarter, and down 324.96K shares year over year.
RENAISSANCE TECHNOLOGIES LLC holds the largest position in HYFM at 70.36K shares as of June 30, 2026, or 1.47% of shares outstanding.
Leading buyers of Hydrofarm Holdings shares for the quarter ending June 2026 were CITADEL ADVISORS LLC (23.98K), Virtu Financial LLC (14.7K), Compass Ion Advisors, LLC (10.75K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (10.61K), UBS Group AG (3.37K).
The largest sellers of Hydrofarm Holdings for the quarter ending June 2026 were Prentice Capital Management, LP (30.73K), GEODE CAPITAL MANAGEMENT, LLC (28.93K), RENAISSANCE TECHNOLOGIES LLC (1.8K), BNP PARIBAS FINANCIAL MARKETS (30).
Per Business Quant, the top 10 investors in HYFM for the quarter ending June 2026 include RENAISSANCE TECHNOLOGIES LLC (70.36K), BlackRock, Inc. (50.46K), VANGUARD CAPITAL MANAGEMENT LLC (39.68K), GEODE CAPITAL MANAGEMENT, LLC (33.66K), CITADEL ADVISORS LLC (23.98K), VANGUARD FIDUCIARY TRUST CO (18.08K), State Street Corp (16.02K), Prentice Capital Management, LP (14.74K), Virtu Financial LLC (14.7K), Compass Ion Advisors, LLC (10.75K).

Form 13F Holdings

23 Institutional Holders

Report period 30 Jun, 2026

Total shares held 317.77K

Of outstanding 6.65%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	RENAISSANCE TECHNOLOGIES LLC	0001037389	70,363	1.47%	▼1,800	-2.49%	$59.79K
2	BlackRock, Inc.	0002012383	50,465	1.06%	0	0.00%	$42.88K
3	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	39,683	0.83%	0	0.00%	$33.73K
4	GEODE CAPITAL MANAGEMENT, LLC	0001214717	33,658	0.70%	▼28,928	-46.22%	$28.61K
5	CITADEL ADVISORS LLC	0001423053	23,985	0.50%	▲23,985	0.00%	$20.38K
6	VANGUARD FIDUCIARY TRUST CO	0000933478	18,082	0.38%	0	0.00%	$15.37K
7	State Street Corp	0000093751	16,015	0.34%	0	0.00%	$13.61K
8	Prentice Capital Management, LP	0001326150	14,736	0.31%	▼30,733	-67.59%	$12.52K
9	Virtu Financial LLC	0001533964	14,696	0.31%	▲14,696	0.00%	$12
10	Compass Ion Advisors, LLC	0001621100	10,753	0.23%	▲10,753	0.00%	$9.14K
11	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	10,613	0.22%	▲10,613	0.00%	$9.02K
12	Tower Research Capital LLC (TRC)	0001533421	5,439	0.11%	▲2,528	+86.84%	$4.62K
13	UBS Group AG	0001610520	4,331	0.09%	▲3,369	+350.21%	$3.68K
14	JNBA Financial Advisors	0001569118	2,000	0.04%	0	0.00%	$1.70K
15	Vanguard Global Advisers, LLC	0001811242	1,269	0.03%	0	0.00%	$1.08K
16	OSAIC HOLDINGS, INC.	0001677044	503	0.01%	▲282	+127.60%	$426
17	North Star Investment Management Corp.	0001342857	370	0.01%	0	0.00%	$314
18	GROUP ONE TRADING LLC	0000932540	338	0.01%	0	0.00%	$287
19	BNP PARIBAS FINANCIAL MARKETS	0001166588	198	0.00%	▼30	-13.16%	$168
20	Hurley Capital, LLC	0001632844	103	0.00%	0	0.00%	$88

Showing 1 to 20 of 23 holders