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 2018?

145 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q1 2018. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q1 2018 13F Holders as of 31 Mar 2018

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 152,306,846
Share change: -128,106
Total reported value: $2,350,190,262
Put/Call ratio: 104%
Price per share: $15.43
Number of holders: 145
Value change: -$1,008,869
Number of buys: 57
Number of sells: 77

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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Explore More Reporting Periods

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Newer quarter: Q2 2018
Previous quarter: Q4 2017

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	12%	18,920,796	$283,622,000	—	31 Dec 2017	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	11%	17,863,732	$267,777,000	—	31 Dec 2017	13F
FMR LLC	13F	Company	11%	17,645,933	$264,512,000	—	31 Dec 2017	13F
BlackRock Finance, Inc.	13F	Company	7.2%	11,702,048	$175,414,000	—	31 Dec 2017	13F
VANGUARD GROUP INC	13F	Company	6.9%	11,274,790	$169,010,000	—	31 Dec 2017	13F
JANUS HENDERSON GROUP PLC	13F	Company	5.1%	8,309,638	$124,561,000	—	31 Dec 2017	13F
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F	Company	3.9%	6,358,354	$95,311,726	—	31 Dec 2017	13F
BROWN CAPITAL MANAGEMENT LLC	13F	Company	3.8%	6,263,825	$93,895,000	—	31 Dec 2017	13F
EcoR1 Capital, LLC	13F	Company	3.6%	5,885,583	$88,225,000	—	31 Dec 2017	13F
STATE STREET CORP	13F	Company	3%	4,828,511	$72,371,000	—	31 Dec 2017	13F
ORBIMED ADVISORS LLC	13F	Company	2.8%	4,525,200	$67,833,000	—	31 Dec 2017	13F
PICTET ASSET MANAGEMENT LTD	13F	Company	1.8%	2,987,270	$44,779,000	—	31 Dec 2017	13F
NORGES BANK	13F	Company	1.4%	2,350,397	$35,232,000	—	31 Dec 2017	13F
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F	Company	1.2%	1,883,793	$28,238,000	—	31 Dec 2017	13F
BNP Paribas Asset Management Holding S.A.	13F	Company	1.1%	1,827,359	$27,392,000	—	31 Dec 2017	13F
Sarissa Capital Management LP	13F	Company	1%	1,650,000	$24,733,000	—	31 Dec 2017	13F
LOOMIS SAYLES & CO L P	13F	Company	0.97%	1,579,857	$23,682,000	—	31 Dec 2017	13F
CREDIT SUISSE AG/	13F	Company	0.96%	1,570,280	$23,539,000	—	31 Dec 2017	13F
NORTHERN TRUST CORP	13F	Company	0.95%	1,557,153	$23,342,000	—	31 Dec 2017	13F
SENZAR ASSET MANAGEMENT, LLC	13F	Company	0.89%	1,448,800	$21,718,000	—	31 Dec 2017	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.86%	1,409,457	$21,128,000	—	31 Dec 2017	13F
Capital World Investors	13F	Company	0.81%	1,330,000	$19,937,000	—	31 Dec 2017	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.76%	1,239,906	$18,586,000	—	31 Dec 2017	13F
ROTHSCHILD & CO ASSET MANAGEMENT US INC.	13F	Company	0.75%	1,227,233	$18,396,000	—	31 Dec 2017	13F
Gamma As Sector	13F	Individual	0.73%	1,188,553	$17,816,000	—	31 Dec 2017	13F
Penn Capital Management Company, LLC	13F	Company	0.53%	857,747	$12,955,000	—	31 Dec 2017	13F
STATE OF WISCONSIN INVESTMENT BOARD	13F	Company	0.52%	846,800	$12,694,000	—	31 Dec 2017	13F
CLEARBRIDGE, LLC	13F	Company	0.49%	795,659	$11,927,000	—	31 Dec 2017	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.39%	642,120	$9,626,000	—	31 Dec 2017	13F
Bank of New York Mellon Corp	13F	Company	0.38%	619,553	$9,288,000	—	31 Dec 2017	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	0.38%	616,747	$9,245,000	—	31 Dec 2017	13F
Park West Asset Management LLC	13F	Company	0.38%	613,958	$9,203,000	—	31 Dec 2017	13F
Artal Group S.A.	13F	Company	0.32%	516,879	$7,748,000	—	31 Dec 2017	13F
Brian C. Broderick	13F	Individual	0.3%	487,065	$7,301,000	—	31 Dec 2017	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.28%	449,964	$6,745,000	—	31 Dec 2017	13F
JPMORGAN CHASE & CO	13F	Company	0.27%	446,701	$6,696,000	—	31 Dec 2017	13F
Granahan Investment Management, LLC	13F	Company	0.24%	391,200	$5,864,000	—	31 Dec 2017	13F
TD ASSET MANAGEMENT INC	13F	Company	0.2%	331,601	$4,971,000	—	31 Dec 2017	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.2%	329,399	$4,938,000	—	31 Dec 2017	13F
DEUTSCHE BANK AG\	13F	Company	0.2%	327,232	$4,903,000	—	31 Dec 2017	13F
D. E. Shaw & Co., Inc.	13F	Company	0.19%	317,601	$4,761,000	—	31 Dec 2017	13F
MORGAN STANLEY	13F	Company	0.19%	313,795	$4,704,000	—	31 Dec 2017	13F
Fisher Asset Management, LLC	13F	Company	0.18%	289,214	$4,335,000	—	31 Dec 2017	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.16%	254,317	$3,812,000	—	31 Dec 2017	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.15%	252,542	$3,785,000	—	31 Dec 2017	13F
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F	Company	0.15%	251,290	$3,767,000	—	31 Dec 2017	13F
SEI INVESTMENTS CO	13F	Company	0.15%	245,031	$3,673,000	—	31 Dec 2017	13F
TEACHERS ADVISORS, LLC	13F	Company	0.15%	242,636	$3,637,000	—	31 Dec 2017	13F
PNC FINANCIAL SERVICES GROUP, INC.	13F	Company	0.14%	234,430	$3,514,000	—	31 Dec 2017	13F
Rock Springs Capital Management LP	13F	Company	0.14%	225,000	$3,373,000	—	31 Dec 2017	13F

Institutional Holders of IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) as of Q1 2018

As of 31 Mar 2018, IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) was held by 145 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 152,306,846 shares. The largest 10 holders included WELLINGTON MANAGEMENT GROUP LLP, FMR LLC, PRICE T ROWE ASSOCIATES INC /MD/, VANGUARD GROUP INC, BlackRock Inc., JANUS HENDERSON GROUP PLC, BROWN CAPITAL MANAGEMENT LLC, STATE STREET CORP, EcoR1 Capital, LLC, and UBS ASSET MANAGEMENT AMERICAS INC. This page lists 145 institutional shareholders reporting positions in this security for the Q1 2018 filing period.

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

Compare Q1 2018 vs Q4 2017 Across Filers

Q4 2017 holders

157

Q1 2018 holders

145

Holder diff

-12

Investor	Q4 2017 Shares	Q1 2018 Shares	Share Diff	Share Chg %	Q4 2017 Value $	Q1 2018 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.