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 Q2 2016?

142 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q2 2016. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q2 2016 13F Holders as of 30 Jun 2016

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 137,183,569
Share change: -3,929,323
Total reported value: $1,793,474,568
Put/Call ratio: 157%
Price per share: $13.07
Number of holders: 142
Value change: -$46,641,420
Number of buys: 80
Number of sells: 50

Quarterly Holders Quick Answers

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

Need full ownership history?
Open the full security ownership history page.

Next holder-history checks

These links keep the next click tied to holder verification, nearby quarters, or outside-13F ownership context.

Back to full security ownership history for the broader multi-quarter picture.
Latest 13F filings for newly reported positions across managers.
Latest Schedule 13D/13G reports for ownership changes outside the 13F cadence.
SEC investors directory for manager drilldown.

Explore More Reporting Periods

Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q3 2016
Previous quarter: Q1 2016

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
FMR LLC	13F	Company	12%	19,118,089	$209,152,000	—	31 Mar 2016	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	11%	17,843,324	$195,206,000	—	31 Mar 2016	13F
JANUS HENDERSON INVESTORS US LLC	13F	Company	10%	16,390,756	$179,337,000	—	31 Mar 2016	13F
ORBIMED ADVISORS LLC	13F	Company	7.1%	11,550,400	$126,361,000	—	31 Mar 2016	13F
VANGUARD GROUP INC	13F	Company	5.6%	9,097,867	$99,531,000	—	31 Mar 2016	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	4.1%	6,705,210	$73,355,000	—	31 Mar 2016	13F
BlackRock Fund Advisors	13F	Company	3.4%	5,534,320	$60,545,000	—	31 Mar 2016	13F
BRIDGER MANAGEMENT, LLC	13F	Company	3.2%	5,178,628	$56,654,000	—	31 Mar 2016	13F
Consonance Capital Management LP	13F	Company	3%	4,944,139	$54,089,000	—	31 Mar 2016	13F
Redmile Group, LLC	13F	Company	2.6%	4,320,192	$47,263,000	—	31 Mar 2016	13F
BlackRock Institutional Trust Company, N.A.	13F	Company	2%	3,229,012	$35,325,000	—	31 Mar 2016	13F
STATE STREET CORP	13F	Company	1.9%	3,045,704	$33,321,000	—	31 Mar 2016	13F
EverPoint Asset Management, LLC	13F	Company	1.7%	2,710,000	$29,647,000	—	31 Mar 2016	13F
Gamma As Sector	13F	Individual	1.5%	2,486,757	$27,205,000	—	31 Mar 2016	13F
STATE OF WISCONSIN INVESTMENT BOARD	13F	Company	1.5%	2,419,897	$26,474,000	—	31 Mar 2016	13F
EcoR1 Capital, LLC	13F	Company	1.3%	2,061,417	$22,552,000	—	31 Mar 2016	13F
BVF INC/IL	13F	Company	1.1%	1,755,745	$19,208,000	—	31 Mar 2016	13F
NORTHERN TRUST CORP	13F	Company	1.1%	1,739,598	$18,864,000	—	31 Mar 2016	13F
LOOMIS SAYLES & CO L P	13F	Company	1%	1,649,172	$18,042,000	—	31 Mar 2016	13F
DEUTSCHE BANK AG\	13F	Company	0.99%	1,624,351	$17,769,000	—	31 Mar 2016	13F
CREDIT SUISSE AG/	13F	Company	0.97%	1,581,186	$17,298,000	—	31 Mar 2016	13F
Point72 Asset Management, L.P.	13F	Company	0.72%	1,180,500	$12,915,000	—	31 Mar 2016	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.57%	932,729	$10,204,000	—	31 Mar 2016	13F
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F	Company	0.55%	900,000	$9,846,000	—	31 Mar 2016	13F
Asset Management One Co., Ltd.	13F	Company	0.51%	836,470	$8,757,000	—	31 Mar 2016	13F
JPMORGAN CHASE & CO	13F	Company	0.47%	764,631	$8,365,000	—	31 Mar 2016	13F
NORGES BANK	13F	Company	0.46%	743,134	$8,130,000	—	31 Mar 2016	13F
Bank of New York Mellon Corp	13F	Company	0.36%	586,646	$6,418,000	—	31 Mar 2016	13F
MORGAN STANLEY	13F	Company	0.3%	484,217	$5,297,000	—	31 Mar 2016	13F
BlackRock Investment Management, LLC	13F	Company	0.27%	440,781	$4,822,000	—	31 Mar 2016	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.26%	418,403	$4,578,000	—	31 Mar 2016	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.25%	401,483	$4,392,000	—	31 Mar 2016	13F
CLEARBRIDGE, LLC	13F	Company	0.23%	369,085	$4,038,000	—	31 Mar 2016	13F
THRIVENT FINANCIAL FOR LUTHERANS	13F	Company	0.22%	357,786	$3,914,000	—	31 Mar 2016	13F
D. E. Shaw & Co., Inc.	13F	Company	0.2%	323,002	$3,534,000	—	31 Mar 2016	13F
BLACKROCK ADVISORS LLC	13F	Company	0.18%	299,831	$3,280,000	—	31 Mar 2016	13F
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F	Company	0.16%	267,522	$2,927,000	—	31 Mar 2016	13F
GUGGENHEIM CAPITAL LLC	13F	Company	0.15%	250,699	$2,743,000	—	31 Mar 2016	13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F	Company	0.15%	248,300	$2,716,000	—	31 Mar 2016	13F
Fisher Asset Management, LLC	13F	Company	0.14%	235,675	$2,656,000	—	31 Mar 2016	13F
Artal Group S.A.	13F	Company	0.13%	216,879	$2,373,000	—	31 Mar 2016	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	0.13%	208,160	$2,277,000	—	31 Mar 2016	13F
OXFORD ASSET MANAGEMENT LLP	13F	Company	0.12%	200,782	$2,197,000	—	31 Mar 2016	13F
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F	Company	0.12%	200,030	$2,189,000	—	31 Mar 2016	13F
Swiss National Bank	13F	Company	0.13%	205,800	$2,172,000	—	31 Mar 2016	13F
A.R.T. Advisors, LLC	13F	Company	0.12%	198,615	$2,172,000	—	31 Mar 2016	13F
TEACHERS ADVISORS, LLC	13F	Company	0.12%	197,975	$2,166,000	—	31 Mar 2016	13F
Spark Investment Management LLC	13F	Company	0.12%	197,800	$2,163,000	—	31 Mar 2016	13F
TD ASSET MANAGEMENT INC	13F	Company	0.12%	193,900	$2,121,000	—	31 Mar 2016	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.12%	190,274	$2,082,000	—	31 Mar 2016	13F

Institutional Holders of IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) as of Q2 2016

As of 30 Jun 2016, IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD) was held by 142 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 137,183,569 shares. The largest 10 holders included FMR LLC, WELLINGTON MANAGEMENT GROUP LLP, JANUS CAPITAL MANAGEMENT LLC, ORBIMED ADVISORS LLC, VANGUARD GROUP INC, PRICE T ROWE ASSOCIATES INC /MD/, BRIDGER MANAGEMENT, LLC, BlackRock Fund Advisors, Consonance Capital Management LP, and BlackRock Institutional Trust Company, N.A.. This page lists 142 institutional shareholders reporting positions in this security for the Q2 2016 filing period.

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

Compare Q2 2016 vs Q1 2016 Across Filers

Q1 2016 holders

133

Q2 2016 holders

142

Holder diff

Investor	Q1 2016 Shares	Q2 2016 Shares	Share Diff	Share Chg %	Q1 2016 Value $	Q2 2016 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.