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 Q1 2020?

186 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q1 2020. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q1 2020 13F Holders as of 31 Mar 2020

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 178,568,993
Share change: +1,073,442
Total reported value: $1,801,785,844
Put/Call ratio: 9.8%
Price per share: $10.09
Number of holders: 186
Value change: +$4,161,742
Number of buys: 88
Number of sells: 97

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: Q2 2020
Previous quarter: Q4 2019

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	13%	21,723,672	$289,141,000	—	31 Dec 2019	13F
BROWN CAPITAL MANAGEMENT LLC	13F	Company	11%	17,901,053	$238,263,000	—	31 Dec 2019	13F
VANGUARD GROUP INC	13F	Company	10%	16,638,941	$221,464,000	—	31 Dec 2019	13F
BlackRock Finance, Inc.	13F	Company	8.3%	13,541,545	$180,237,000	—	31 Dec 2019	13F
FMR LLC	13F	Company	6.6%	10,804,989	$143,815,000	—	31 Dec 2019	13F
Sarissa Capital Management LP	13F	Company	6.3%	10,307,000	$137,186,000	—	31 Dec 2019	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	5.4%	8,744,233	$116,385,740	—	31 Dec 2019	13F
JANUS HENDERSON GROUP PLC	13F	Company	5.1%	8,289,895	$110,338,000	—	31 Dec 2019	13F
MFN Partners Management, LP	13F	Company	3.9%	6,439,541	$85,710,000	—	31 Dec 2019	13F
STATE STREET CORP	13F	Company	3.5%	5,774,445	$76,858,000	—	31 Dec 2019	13F
EcoR1 Capital, LLC	13F	Company	2.7%	4,371,408	$58,183,000	—	31 Dec 2019	13F
CREDIT SUISSE AG/	13F	Company	1.9%	3,063,143	$40,770,000	—	31 Dec 2019	13F
NORGES BANK	13F	Company	1.6%	2,577,122	$34,301,000	—	31 Dec 2019	13F
WESTFIELD CAPITAL MANAGEMENT CO LP	13F	Company	1.5%	2,437,096	$32,438,000	—	31 Dec 2019	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.3%	2,194,088	$29,203,000	—	31 Dec 2019	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	1.3%	2,043,341	$27,197,000	—	31 Dec 2019	13F
Capital World Investors	13F	Company	1.2%	2,030,000	$27,019,000	—	31 Dec 2019	13F
NORTHERN TRUST CORP	13F	Company	1.2%	2,000,626	$26,628,000	—	31 Dec 2019	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	1.2%	1,904,229	$25,345,000	—	31 Dec 2019	13F
TWO SIGMA INVESTMENTS, LP	13F	Company	0.91%	1,491,107	$19,847,000	—	31 Dec 2019	13F
D. E. Shaw & Co., Inc.	13F	Company	0.9%	1,465,626	$19,508,000	—	31 Dec 2019	13F
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F	Company	0.84%	1,375,000	$18,301,000	—	31 Dec 2019	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.83%	1,348,998	$17,955,000	—	31 Dec 2019	13F
TWO SIGMA ADVISERS, LP	13F	Company	0.82%	1,338,457	$17,815,000	—	31 Dec 2019	13F
CITADEL ADVISORS LLC	13F	Company	0.8%	1,312,165	$17,465,000	—	31 Dec 2019	13F
PEREGRINE CAPITAL MANAGEMENT LLC	13F	Company	0.77%	1,259,947	$16,770,000	—	31 Dec 2019	13F
DEUTSCHE BANK AG\	13F	Company	0.73%	1,197,597	$15,939,000	—	31 Dec 2019	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.71%	1,166,815	$15,530,000	—	31 Dec 2019	13F
MARSHALL WACE, LLP	13F	Company	0.66%	1,084,176	$14,430,000	—	31 Dec 2019	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	0.65%	1,054,096	$14,030,000	—	31 Dec 2019	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.59%	958,154	$12,754,000	—	31 Dec 2019	13F
JACOBS LEVY EQUITY MANAGEMENT, INC	13F	Company	0.57%	928,640	$12,360,000	—	31 Dec 2019	13F
UBS Group AG	13F	Company	0.46%	758,879	$10,101,000	—	31 Dec 2019	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.46%	753,690	$10,032,000	—	31 Dec 2019	13F
Bank of New York Mellon Corp	13F	Company	0.42%	680,185	$9,054,000	—	31 Dec 2019	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.41%	668,917	$8,903,000	—	31 Dec 2019	13F
PANAGORA ASSET MANAGEMENT INC	13F	Company	0.37%	604,506	$8,046,000	—	31 Dec 2019	13F
Nuveen Asset Management, LLC	13F	Company	0.37%	602,024	$8,013,000	—	31 Dec 2019	13F
Bain Capital Public Equity Management II, LLC	13F	Company	0.35%	575,301	$7,657,000	—	31 Dec 2019	13F
PICTET ASSET MANAGEMENT LTD	13F	Company	0.34%	563,255	$7,497,000	—	31 Dec 2019	13F
COLONY GROUP LLC	13F	Company	0.32%	515,012	$6,855,000	—	31 Dec 2019	13F
FEDERATED HERMES, INC.	13F	Company	0.31%	505,685	$6,731,000	—	31 Dec 2019	13F
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	13F	Company	0.29%	481,624	$6,410,000	—	31 Dec 2019	13F
13D Management LLC	13F	Company	0.26%	420,753	$5,600,000	—	31 Dec 2019	13F
CHICAGO EQUITY PARTNERS LLC	13F	Company	0.26%	417,407	$5,556,000	—	31 Dec 2019	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.25%	403,777	$5,375,000	—	31 Dec 2019	13F
Atom Investors LP	13F	Company	0.22%	353,362	$4,703,000	—	31 Dec 2019	13F
WELLS FARGO & COMPANY/MN	13F	Company	0.21%	336,712	$4,482,000	—	31 Dec 2019	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.2%	319,800	$4,257,000	—	31 Dec 2019	13F
ALPS ADVISORS INC	13F	Company	0.19%	315,848	$4,204,000	—	31 Dec 2019	13F

Institutional Holders of IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) as of Q1 2020

As of 31 Mar 2020, IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) was held by 186 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 178,568,993 shares. The largest 10 holders included WELLINGTON MANAGEMENT GROUP LLP, BROWN CAPITAL MANAGEMENT LLC, VANGUARD GROUP INC, Sarissa Capital Management LP, BlackRock Inc., FMR LLC, UBS ASSET MANAGEMENT AMERICAS INC, JANUS HENDERSON GROUP PLC, STATE STREET CORP, and WESTFIELD CAPITAL MANAGEMENT CO LP. This page lists 186 institutional shareholders reporting positions in this security for the Q1 2020 filing period.

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

Compare Q1 2020 vs Q4 2019 Across Filers

Q4 2019 holders

191

Q1 2020 holders

186

Holder diff

-5

Investor	Q4 2019 Shares	Q1 2020 Shares	Share Diff	Share Chg %	Q4 2019 Value $	Q1 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.