What does CUSIP 46333X108 represent in this 13F holders report?

CUSIP 46333X108 is the security identifier for IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock used to aggregate holder disclosures.

How many institutions held IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock in Q4 2020?

191 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q4 2020. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q4 2020 13F Holders as of 31 Dec 2020

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 171,628,514
Share change: -1,119,194
Total reported value: $1,954,636,964
Put/Call ratio: 2.8%
Price per share: $11.39
Number of holders: 191
Value change: -$289,602
Number of buys: 96
Number of sells: 85

Quarterly Holders Quick Answers

What is CUSIP 46333X108?
CUSIP 46333X108 identifies IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock in SEC institutional holdings data.

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Newer quarter: Q1 2021
Previous quarter: Q3 2020

Recent filing periods for CUSIP 46333X108:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	14%	22,275,154	$200,366,000	—	30 Sep 2020	13F
BROWN CAPITAL MANAGEMENT LLC	13F	Company	12%	20,103,292	$180,829,000	—	30 Sep 2020	13F
VANGUARD GROUP INC	13F	Company	9.6%	15,758,418	$141,748,000	—	30 Sep 2020	13F
BlackRock Finance, Inc.	13F	Company	8.6%	14,089,184	$126,733,000	—	30 Sep 2020	13F
Sarissa Capital Management LP	13F	Company	8.6%	14,040,000	$126,289,000	—	30 Sep 2020	13F
STATE STREET CORP	13F	Company	4.9%	7,984,250	$71,818,000	—	30 Sep 2020	13F
Camber Capital Management LP	13F	Company	4.4%	7,250,000	$65,214,000	—	30 Sep 2020	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	4.2%	6,846,192	$61,581,000	—	30 Sep 2020	13F
FMR LLC	13F	Company	2.3%	3,834,396	$34,490,000	—	30 Sep 2020	13F
CREDIT SUISSE AG/	13F	Company	2.2%	3,658,958	$32,911,000	—	30 Sep 2020	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	2.1%	3,454,242	$31,070,908	—	30 Sep 2020	13F
JANUS HENDERSON GROUP PLC	13F	Company	2.1%	3,386,302	$30,460,000	—	30 Sep 2020	13F
BRIDGER MANAGEMENT, LLC	13F	Company	1.7%	2,775,467	$24,965,000	—	30 Sep 2020	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	1.5%	2,379,782	$21,406,000	—	30 Sep 2020	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.4%	2,357,467	$21,204,000	—	30 Sep 2020	13F
PUTNAM INVESTMENTS LLC	13F	Company	1.3%	2,095,332	$18,848,000	—	30 Sep 2020	13F
NORGES BANK	13F	Company	1.3%	2,052,390	$18,461,000	—	30 Sep 2020	13F
NORTHERN TRUST CORP	13F	Company	1.2%	2,038,249	$18,335,000	—	30 Sep 2020	13F
Capital World Investors	13F	Company	1.2%	2,030,000	$18,260,000	—	30 Sep 2020	13F
Man Group plc	13F	Company	1.2%	2,025,668	$18,221,000	—	30 Sep 2020	13F
D. E. Shaw & Co., Inc.	13F	Company	1.1%	1,848,305	$16,626,000	—	30 Sep 2020	13F
Atom Investors LP	13F	Company	0.74%	1,205,944	$10,847,000	—	30 Sep 2020	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.7%	1,141,981	$10,273,000	—	30 Sep 2020	13F
PEREGRINE CAPITAL MANAGEMENT LLC	13F	Company	0.68%	1,117,031	$10,048,000	—	30 Sep 2020	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.68%	1,107,738	$9,964,000	—	30 Sep 2020	13F
Nuveen Asset Management, LLC	13F	Company	0.67%	1,089,943	$9,804,000	—	30 Sep 2020	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.62%	1,014,738	$9,130,000	—	30 Sep 2020	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.59%	960,158	$8,637,000	—	30 Sep 2020	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.56%	917,753	$8,255,000	—	30 Sep 2020	13F
GLENMEDE TRUST CO NA	13F	Company	0.55%	899,965	$8,094,000	—	30 Sep 2020	13F
MORGAN STANLEY	13F	Company	0.55%	894,711	$8,047,000	—	30 Sep 2020	13F
PICTET ASSET MANAGEMENT LTD	13F	Company	0.51%	837,316	$7,532,000	—	30 Sep 2020	13F
ACADIAN ASSET MANAGEMENT LLC	13F	Company	0.49%	795,804	$7,160,000	—	30 Sep 2020	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.45%	735,857	$6,619,000	—	30 Sep 2020	13F
Invesco Ltd.	13F	Company	0.42%	690,615	$6,212,000	—	30 Sep 2020	13F
Bank of New York Mellon Corp	13F	Company	0.4%	651,791	$5,863,000	—	30 Sep 2020	13F
CITADEL ADVISORS LLC	13F	Company	0.39%	637,946	$5,738,000	—	30 Sep 2020	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	0.37%	597,090	$5,371,000	—	30 Sep 2020	13F
Michael F. Price	13F	Individual	0.31%	501,874	$4,514,000	—	30 Sep 2020	13F
FEDERATED HERMES, INC.	13F	Company	0.31%	501,341	$4,510,000	—	30 Sep 2020	13F
BARCLAYS PLC	13F	Company	0.3%	491,410	$4,421,000	—	30 Sep 2020	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.27%	436,674	$3,928,000	—	30 Sep 2020	13F
13D Management LLC	13F	Company	0.27%	436,322	$3,925,000	—	30 Sep 2020	13F
Skandinaviska Enskilda Banken AB (publ)	13F	Company	0.25%	401,600	$3,612,000	—	30 Sep 2020	13F
AJO, LP	13F	Company	0.23%	370,558	$3,333,000	—	30 Sep 2020	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.22%	363,160	$3,267,000	—	30 Sep 2020	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.22%	362,105	$3,257,000	—	30 Sep 2020	13F
Swiss National Bank	13F	Company	0.21%	343,200	$3,087,000	—	30 Sep 2020	13F
PRINCIPAL FINANCIAL GROUP INC	13F	Company	0.2%	319,840	$2,877,000	—	30 Sep 2020	13F
ExodusPoint Capital Management, LP	13F	Company	0.19%	310,483	$2,793,000	—	30 Sep 2020	13F

Institutional Holders of IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) as of Q4 2020

As of 31 Dec 2020, IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) was held by 191 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 171,628,514 shares. The largest 10 holders included WELLINGTON MANAGEMENT GROUP LLP, BROWN CAPITAL MANAGEMENT LLC, VANGUARD GROUP INC, Sarissa Capital Management LP, BlackRock Inc., WESTFIELD CAPITAL MANAGEMENT CO LP, STATE STREET CORP, Camber Capital Management LP, CREDIT SUISSE AG/, and PUTNAM INVESTMENTS LLC. This page lists 191 institutional shareholders reporting positions in this security for the Q4 2020 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2020 vs Q3 2020 Across Filers

Q3 2020 holders

183

Q4 2020 holders

191

Holder diff

Investor	Q3 2020 Shares	Q4 2020 Shares	Share Diff	Share Chg %	Q3 2020 Value $	Q4 2020 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.