Security key
46333X108
IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)
CUSIP: 46333X108
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Class A Common Stock
- Total 13F shares
- 155,587,802
- Total 13F value
- $228,692,691
- Share change
- -8,943,189
- Put/Call ratio
- 0.06%
- SEC-reported price per share
- $1.47
- Number of holders
- 200
- Value change
- -$26,001,186
- Number of buys
- 101
- Number of sells
- 114
- Shares outstanding
- 163,317,295
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q1 2025
Institutions
200
Top holders
10
IRWD full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2025
Previous quarter: Q4 2024
IRONWOOD PHARMACEUTICALS INC SEC filings
IRONWOOD PHARMACEUTICALS INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 46333X108
Recent filing periods:
Ownership snapshot
Top reported holders of IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (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
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Dec 2024
13F
13D/G
Lead comparable stake: 7.1%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 7.1%.
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.
Comparable ownership
Top 5
BlackRock, Inc.
7.1%
RENAISSANCE TECHNOLOGIES LLC
5.4%
STATE STREET CORP
2.2%
Pacer Advisors, Inc.
1.1%
Sarissa Capital Management LP
10%
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 |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
7.1%
from 13D/G
|
$102,104,849
23,121,157 shares
mixed-class rows
|
— | 31 Dec 2024 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
13D/G
Company
|
5.4%
from 13D/G
|
$40,163,448
9,066,241 shares
|
— | 31 Dec 2024 |
| STATE STREET CORP |
13F
13D/G
Company · STATE STREET CORPORATION
|
2.2%
from 13D/G
|
$36,919,982
8,368,347 shares
mixed-class rows
|
— | 31 Dec 2024 |
| Pacer Advisors, Inc. |
13F
13D/G
Company · Pacer US Small Cap Cash Cows ETF
|
1.1%
from 13D/G
|
$51,967,316
11,730,771 shares
|
— | 31 Dec 2024 |
| Sarissa Capital Management LP |
13F
Company
|
10%
|
$72,607,700
16,390,000 shares
|
— | 31 Dec 2024 |
| ARMISTICE CAPITAL, LLC |
13F
Company
|
5.8%
|
$41,943,240
9,468,000 shares
|
— | 31 Dec 2024 |
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 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
200
Shares
155,587,802
Rows available
200
| 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 2025 vs Q4 2024 Across Filers
Q4 2024 holders
222
Q1 2025 holders
200
Holder diff
-22
| Investor | Q4 2024 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q4 2024 value | Q1 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend