Security key
44888K209
HYDROFARM HOLDINGS GROUP, INC. - Common Stock, $0.0001 par value (HYFM)
CUSIP: 44888K209
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, $0.0001 par value
- Total 13F shares
- 45,469
- Total 13F value
- $68,658
- Share change
- -2,980
- SEC-reported price per share
- $1.51
- Number of holders
- 1
- Value change
- -$4,500
- Number of sells
- 1
- Shares outstanding
- 4,632,653
Holder snapshot
5 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
1
Top holders
1
HYFM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
HYDROFARM HOLDINGS GROUP, INC. SEC filings
HYDROFARM HOLDINGS GROUP, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 44888K209
Recent filing periods:
Ownership snapshot
Top reported holders of HYFM - HYDROFARM HOLDINGS GROUP, INC. - Common Stock, $0.0001 par value (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Bogaczyk Janusz Michal
Disclosed value leader
Michael Rapp
Comparable rows
15/15
Latest evidence
01 Oct 2025
13D/G
3/4/5
13F
Lead comparable stake: 9.8%
13D/G row: Bogaczyk Janusz Michal
Showing 1-6 of 15 holder rows.
Quick read
Bogaczyk Janusz Michal leads the comparable SEC ownership view at 9.8%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Bogaczyk Janusz Michal's linked filing trail.
Comparable ownership
Top 5
Bogaczyk Janusz Michal
9.8%
Dumont Master Fund LP
7.1%
Richard Christopher Yetter
6.6%
Michael Rapp
3.7%
B. John Lindeman
1.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Bogaczyk Janusz Michal |
13D/G
|
9.8%
|
$858,060
454,000 shares
|
+$76,602 | 21 Mar 2025 |
| Dumont Master Fund LP |
13D/G
Dumont Global LP
|
7.1%
|
$618,030
327,000 shares
|
$0 | 12 Feb 2025 |
| Richard Christopher Yetter |
13D/G
Dumont Global LP
|
6.6%
|
$1,016,656
305,000 shares
|
$0 | 01 Oct 2025 |
| Michael Rapp |
13D/G
Michael Rapoport
|
3.7%
|
$3,266,665
1,728,394 shares
|
$0 | 31 Dec 2024 |
| B. John Lindeman |
3/4/5
Chief Executive Officer
|
1.2%
|
$255,640
56,683 shares
|
— | 18 Aug 2025 |
| VANGUARD GROUP INC |
13F
Company
|
4%
|
$617,256
187,616 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1
Shares
45,469
Rows available
1
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
1
Q4 2025 holders
1
Holder diff
0
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend