Security key
46333X108
IRONWOOD PHARMACEUTICALS INC - Class A Stock (IRWD)
CUSIP: 46333X108
Q4 2021 13F Holders as of 31 Dec 2021
- Security type / class
- Equity / Class A Stock
- Total 13F shares
- 171,908,670
- Total 13F value
- $2,002,842,425
- Share change
- -6,448,079
- Put/Call ratio
- 19%
- SEC-reported price per share
- $11.66
- Number of holders
- 206
- Value change
- -$78,175,850
- Number of buys
- 87
- Number of sells
- 111
- Shares outstanding
- 165,105,778
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2021
Institutions
206
Top holders
10
IRWD full security history
Ownership snapshot
Full 13F holder table
IRONWOOD PHARMACEUTICALS INC SEC filings
IRONWOOD PHARMACEUTICALS INC company facts
Broader feeds
Ownership snapshot
Top reported holders of IRWD - IRONWOOD PHARMACEUTICALS INC - Class A 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
WELLINGTON MANAGEMENT GRO...
Disclosed value leader
WELLINGTON MANAGEMENT GRO...
Comparable rows
15/15
Latest evidence
30 Sep 2021
13F
Lead comparable stake: 11%
Showing 1-6 of 15 holder rows.
Quick read
WELLINGTON MANAGEMENT GROUP LLP leads the comparable SEC ownership view at 11%.
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 WELLINGTON MANAGEMENT GROUP LLP's linked filing trail.
Comparable ownership
Top 5
WELLINGTON MANAGEMENT GROUP LLP
11%
BROWN CAPITAL MANAGEMENT LLC
10%
Sarissa Capital Management LP
9.9%
WESTFIELD CAPITAL MANAGEMENT CO LP
5%
LSV ASSET MANAGEMENT
4.7%
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 |
|---|---|---|---|---|---|
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
11%
|
$228,563,000
17,501,021 shares
|
— | 30 Sep 2021 |
| BROWN CAPITAL MANAGEMENT LLC |
13F
Company
|
10%
|
$222,077,000
17,004,395 shares
|
— | 30 Sep 2021 |
| Sarissa Capital Management LP |
13F
Company
|
9.9%
|
$214,053,000
16,390,000 shares
|
— | 30 Sep 2021 |
| WESTFIELD CAPITAL MANAGEMENT CO LP |
13F
Company
|
5%
|
$106,844,000
8,181,003 shares
|
— | 30 Sep 2021 |
| LSV ASSET MANAGEMENT |
13F
Company
|
4.7%
|
$102,027,000
7,812,227 shares
|
— | 30 Sep 2021 |
| Camber Capital Management LP |
13F
Company
|
3.3%
|
$71,830,000
5,500,000 shares
|
— | 30 Sep 2021 |
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 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
206
Shares
171,908,670
Rows available
206
| 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 2021 vs Q3 2021 Across Filers
Q3 2021 holders
216
Q4 2021 holders
206
Holder diff
-10
| Investor | Q3 2021 Shares | Q4 2021 Shares | Share Diff | Share Chg % | Q3 2021 value | Q4 2021 value | Value change | Value Chg % |
|---|