Security key
23254X201
IRONWOOD PHARMACEUTICALS, INC. - Class A common stock, $0.001 par value (CYTH)
CUSIP: 23254X201
Q1 2021 13F Holders as of 31 Mar 2021
- Security type / class
- Equity / Class A common stock, $0.001 par value
- Total 13F shares
- 71,184
- Total 13F value
- $583,000
- Share change
- -522,083
- SEC-reported price per share
- $8.18
- Number of holders
- 7
- Value change
- -$3,341,359
- Number of buys
- 5
- Number of sells
- 6
- Shares outstanding
- 162,993,492
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2021
Institutions
7
Top holders
7
CYTH 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 CYTH - IRONWOOD PHARMACEUTICALS, INC. - Class A common stock, $0.001 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
WELLINGTON MANAGEMENT GRO...
Disclosed value leader
WELLINGTON MANAGEMENT GRO...
Comparable rows
0/15
Latest evidence
31 Dec 2020
13F
Highest disclosed value: $246,226,000
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
WELLINGTON MANAGEMENT GROUP LLP has the largest disclosed position value at $246.23M.
0 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.
Disclosed position value
Top 5
WELLINGTON MANAGEMENT GROUP LLP
$246.23M
BROWN CAPITAL MANAGEMENT LLC
$229.51M
VANGUARD GROUP INC
$181.02M
Sarissa Capital Management LP
$159.92M
BlackRock Finance, Inc.
$148.58M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
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
|
—
denominator unverified
|
$246,226,000
21,617,713 shares
|
— | 31 Dec 2020 |
| BROWN CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$229,514,000
20,150,463 shares
|
— | 31 Dec 2020 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$181,015,000
15,892,347 shares
|
— | 31 Dec 2020 |
| Sarissa Capital Management LP |
13F
Company
|
—
denominator unverified
|
$159,915,000
14,040,000 shares
|
— | 31 Dec 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$148,580,000
13,044,650 shares
|
— | 31 Dec 2020 |
| WESTFIELD CAPITAL MANAGEMENT CO LP |
13F
Company
|
—
denominator unverified
|
$96,679,000
8,488,042 shares
|
— | 31 Dec 2020 |
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 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
7
Shares
71,184
Rows available
7
| 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 2021 vs Q1 2021 Across Filers
Q1 2021 holders
7
Q1 2021 holders
7
Holder diff
0
| Investor | Q1 2021 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q1 2021 value | Q1 2021 value | Value change | Value Chg % |
|---|