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 2017?

158 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q1 2017. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q1 2017 13F Holders as of 31 Mar 2017

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 146,394,957
Share change: +18,184,166
Total reported value: $2,497,507,218
Put/Call ratio: 88%
Price per share: $17.06
Number of holders: 158
Value change: +$313,109,692
Number of buys: 78
Number of sells: 71

Security key

46333X108

Report period

Q1 2017

Institutions

158

Top holders

IRWD full security history Ownership snapshot Full 13F holder table Newer quarter: Q2 2017 Previous quarter: Q4 2016 IRONWOOD PHARMACEUTICALS INC SEC filings IRONWOOD PHARMACEUTICALS INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 46333X108

Newer quarter: Q2 2017 Previous quarter: Q4 2016

Recent filing periods:

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

Ownership snapshot

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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

FMR LLC

13D/G signal

—

Evidence rows

Latest as of

31 Dec 2016

13F Lead comparable stake: 12% Showing first 8 of 50 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
FMR LLC	13F Company 13F	12%	$300,818,000 19,674,160 shares	—	31 Dec 2016
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	11%	$280,312,000 18,333,040 shares	—	31 Dec 2016
PRICE T ROWE ASSOCIATES INC /MD/	13F Company 13F	8.9%	$221,538,000 14,489,073 shares	—	31 Dec 2016
JANUS HENDERSON INVESTORS US LLC	13F Company 13F	7.6%	$190,128,000 12,433,680 shares	—	31 Dec 2016
VANGUARD GROUP INC	13F Company 13F	6.1%	$152,034,000 9,943,282 shares	—	31 Dec 2016
ORBIMED ADVISORS LLC	13F Company 13F	4.4%	$110,719,000 7,241,300 shares	—	31 Dec 2016
BlackRock Fund Advisors	13F Company 13F	4%	$98,651,000 6,452,010 shares	—	31 Dec 2016
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	3.6%	$90,976,000 5,950,000 shares	—	31 Dec 2016

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
STATE STREET CORP	13F Company 13F	2.3%	$57,972,000 3,791,359 shares	—	31 Dec 2016
BlackRock Institutional Trust Company, N.A.	13F Company 13F	2.2%	$54,264,000 3,548,966 shares	—	31 Dec 2016
EcoR1 Capital, LLC	13F Company 13F	1.7%	$43,661,000 2,855,515 shares	—	31 Dec 2016
Gamma As Sector	13F Individual 13F	1.2%	$30,162,000 1,972,678 shares	—	31 Dec 2016
BRIDGER MANAGEMENT, LLC	13F Company 13F	1.2%	$28,735,000 1,879,313 shares	—	31 Dec 2016
LOOMIS SAYLES & CO L P	13F Company 13F	0.99%	$24,797,000 1,621,787 shares	—	31 Dec 2016
CREDIT SUISSE AG/	13F Company 13F	0.95%	$23,828,000 1,558,428 shares	—	31 Dec 2016
NORTHERN TRUST CORP	13F Company 13F	0.92%	$23,098,000 1,510,621 shares	—	31 Dec 2016
Granahan Investment Management, LLC	13F Company 13F	0.86%	$21,528,000 1,408,000 shares	—	31 Dec 2016
Rubric Capital Management LP	13F Company 13F	0.78%	$19,495,000 1,275,000 shares	—	31 Dec 2016
NORGES BANK	13F Company 13F	0.73%	$18,285,000 1,195,876 shares	—	31 Dec 2016
GOLDMAN SACHS GROUP INC	13F Company 13F	0.68%	$16,965,000 1,109,543 shares	—	31 Dec 2016
BNP Paribas Asset Management Holding S.A.	13F Company 13F	0.66%	$16,381,000 1,071,386 shares	—	31 Dec 2016
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	0.64%	$15,935,000 1,042,193 shares	—	31 Dec 2016
ROTHSCHILD & CO ASSET MANAGEMENT US INC.	13F Company 13F	0.64%	$15,871,000 1,038,005 shares	—	31 Dec 2016
PICTET ASSET MANAGEMENT LTD	13F Company 13F	0.59%	$14,821,000 969,324 shares	—	31 Dec 2016
EverPoint Asset Management, LLC	13F Company 13F	0.51%	$12,614,000 825,000 shares	—	31 Dec 2016
BLUE JAY CAPITAL MANAGEMENT, LLC	13F Company 13F	0.47%	$11,810,000 772,369 shares	—	31 Dec 2016
Carlson Capital, L.P.	13F Company 13F	0.44%	$11,085,000 725,000 shares	—	31 Dec 2016
D. E. Shaw & Co., Inc.	13F Company 13F	0.39%	$9,633,000 629,994 shares	—	31 Dec 2016
CLEARBRIDGE, LLC	13F Company 13F	0.38%	$9,485,000 620,345 shares	—	31 Dec 2016
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.38%	$9,429,000 616,639 shares	—	31 Dec 2016
Bank of New York Mellon Corp	13F Company 13F	0.37%	$9,343,000 611,082 shares	—	31 Dec 2016
Artal Group S.A.	13F Company 13F	0.32%	$7,903,000 516,879 shares	—	31 Dec 2016
Spark Investment Management LLC	13F Company 13F	0.31%	$7,632,000 499,200 shares	—	31 Dec 2016
BlackRock Investment Management, LLC	13F Company 13F	0.3%	$7,407,000 484,465 shares	—	31 Dec 2016
MORGAN STANLEY	13F Company 13F	0.29%	$7,329,000 479,380 shares	—	31 Dec 2016
BLACKROCK ADVISORS LLC	13F Company 13F	0.26%	$6,496,000 424,864 shares	—	31 Dec 2016
ALLIANCEBERNSTEIN L.P.	13F Company 13F	0.25%	$6,220,000 406,770 shares	—	31 Dec 2016
TIAA CREF INVESTMENT MANAGEMENT LLC	13F Company 13F	0.23%	$5,663,000 370,378 shares	—	31 Dec 2016
CITIGROUP INC	13F Company 13F	0.22%	$5,382,000 351,990 shares	—	31 Dec 2016
MARSHALL WACE, LLP	13F Company 13F	0.2%	$5,091,000 332,957 shares	—	31 Dec 2016
MACQUARIE GROUP LTD	13F Company 13F	0.19%	$4,777,000 312,459 shares	—	31 Dec 2016
TD ASSET MANAGEMENT INC	13F Company 13F	0.19%	$4,679,000 306,028 shares	—	31 Dec 2016
Point72 Asset Management, L.P.	13F Company 13F	0.18%	$4,458,000 291,532 shares	—	31 Dec 2016
STATE OF WISCONSIN INVESTMENT BOARD	13F Company 13F	0.17%	$4,281,000 280,000 shares	—	31 Dec 2016
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	13F Company 13F	0.16%	$4,080,000 266,810 shares	—	31 Dec 2016
MILLENNIUM MANAGEMENT LLC	13F Company 13F	0.16%	$4,038,000 264,105 shares	—	31 Dec 2016
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F Company 13F	0.14%	$3,589,000 234,700 shares	—	31 Dec 2016
PNC FINANCIAL SERVICES GROUP, INC.	13F Company 13F	0.14%	$3,573,000 233,715 shares	—	31 Dec 2016
TWO SIGMA INVESTMENTS, LP	13F Company 13F	0.14%	$3,567,000 233,318 shares	—	31 Dec 2016
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F Company 13F	0.14%	$3,513,000 229,790 shares	—	31 Dec 2016

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 2017

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

158

146,394,957

Rows loaded

158

Investor	Option	Weight %	Change %	Reported value	* Price	Shares	Share Change	Activity	Report Period

* 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. An asterisk next to the price means the price is likely invalid.

Compare Q1 2017 vs Q4 2016 Across Filers

Q4 2016 holders

159

Q1 2017 holders

158

Holder diff

-1

Investor	Q4 2016 Shares	Q1 2017 Shares	Share Diff	Share Chg %	Q4 2016 value	Q1 2017 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend