Security key
G6333L200
Iterum Therapeutics plc - Ordinary Shares, $0.01 par value per share (ITRMF)
CUSIP: G6333L200
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Ordinary Shares, $0.01 par value per share
- Total 13F shares
- 1,413,063
- Total 13F value
- $41,335
- Share change
- -30,815
- SEC-reported price per share
- $0.03
- Number of holders
- 18
- Value change
- -$386,745
- Number of buys
- 13
- Number of sells
- 9
- Shares outstanding
- 28,961,082
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
18
Top holders
10
ITRMF full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
Iterum Therapeutics plc SEC filings
Iterum Therapeutics plc company facts
Broader feeds
Reporting periods
Holder history for CUSIP G6333L200
Recent filing periods:
Ownership snapshot
Top reported holders of ITRMF - Iterum Therapeutics plc - Ordinary Shares, $0.01 par value per share (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
ARMISTICE CAPITAL, LLC
Disclosed value leader
ARMISTICE CAPITAL, LLC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 5%
13D/G row: ARMISTICE CAPITAL, LLC
Showing 1-6 of 15 holder rows.
Quick read
ARMISTICE CAPITAL, LLC leads the comparable SEC ownership view at 5%.
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 ARMISTICE CAPITAL, LLC's linked filing trail.
Comparable ownership
Top 5
ARMISTICE CAPITAL, LLC
5%
Michael W. Dunne
0.83%
Apollon Financial, LLC
2.2%
JANE STREET GROUP, LLC
1%
Alchemi Wealth, LLC
0.93%
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 |
|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC |
13D/G
|
5%
|
$1,820,899
1,445,158 shares
|
$0 | 31 Dec 2024 |
| Michael W. Dunne |
3/4/5
Director
|
0.83%
|
$88,013
241,001 shares
|
+$2,191 | 18 Nov 2025 |
| Apollon Financial, LLC |
13F
Company
|
2.2%
|
$211,134
630,250 shares
|
— | 31 Dec 2025 |
| JANE STREET GROUP, LLC |
13F
Company
|
1%
|
$96,952
289,410 shares
|
— | 31 Dec 2025 |
| Alchemi Wealth, LLC |
13F
Company
|
0.93%
|
$90,077
268,886 shares
|
— | 31 Dec 2025 |
| UBS Group AG |
13F
Company
|
0.41%
|
$40,182
119,948 shares
|
— | 31 Dec 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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
18
Shares
1,413,063
Rows available
18
| 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 Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
15
Q1 2026 holders
18
Holder diff
3
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend