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 Q3 2018?

149 institutional investors reported IRWD - IRONWOOD PHARMACEUTICALS INC - Class A Common Stock for Q3 2018. Use the holders table for investor-level position and value details.

IRONWOOD PHARMACEUTICALS INC - Class A Common Stock (IRWD)

CUSIP: 46333X108

Q3 2018 13F Holders as of 30 Sep 2018

Type / Class: Equity / Class A Common Stock
Shares outstanding: 163,317,295
Total 13F shares: 144,665,764
Share change: -3,246,537
Total reported value: $2,670,486,249
Put/Call ratio: 81%
Price per share: $18.46
Number of holders: 149
Value change: -$61,027,521
Number of buys: 64
Number of sells: 66

Security key

46333X108

Report period

Q3 2018

Institutions

149

Top holders

IRWD full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2018 Previous quarter: Q2 2018 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: Q4 2018 Previous quarter: Q2 2018

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

WELLINGTON MANAGEMENT GRO...

13D/G signal

—

Evidence rows

Latest as of

30 Jun 2018

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

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	12%	$368,312,000 19,263,267 shares	—	30 Jun 2018
FMR LLC	13F Company 13F	11%	$345,852,000 18,088,500 shares	—	30 Jun 2018
VANGUARD GROUP INC	13F Company 13F	7.3%	$228,441,000 11,947,777 shares	—	30 Jun 2018
BlackRock Finance, Inc.	13F Company 13F	7.2%	$225,728,000 11,805,955 shares	—	30 Jun 2018
PRICE T ROWE ASSOCIATES INC /MD/	13F Company 13F	6.8%	$213,543,000 11,168,591 shares	—	30 Jun 2018
JANUS HENDERSON GROUP PLC	13F Company 13F	4.9%	$154,259,000 8,067,938 shares	—	30 Jun 2018
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F Company 13F	4%	$123,536,805 6,461,130 shares	—	30 Jun 2018
BROWN CAPITAL MANAGEMENT LLC	13F Company 13F	3.9%	$120,560,000 6,305,456 shares	—	30 Jun 2018

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
EcoR1 Capital, LLC	13F Company 13F	3.8%	$119,501,000 6,250,073 shares	—	30 Jun 2018
STATE STREET CORP	13F Company 13F	3.4%	$105,884,000 5,537,623 shares	—	30 Jun 2018
Sarissa Capital Management LP	13F Company 13F	2.1%	$64,378,000 3,367,100 shares	—	30 Jun 2018
ORBIMED ADVISORS LLC	13F Company 13F	1.8%	$56,007,000 2,929,250 shares	—	30 Jun 2018
OppenheimerFunds, Inc.	13F Company 13F	1.8%	$54,925,000 2,872,640 shares	—	30 Jun 2018
Capital World Investors	13F Company 13F	1.2%	$38,814,000 2,030,000 shares	—	30 Jun 2018
PICTET ASSET MANAGEMENT LTD	13F Company 13F	1.2%	$38,178,000 1,996,776 shares	—	30 Jun 2018
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	1.1%	$35,850,000 1,875,000 shares	—	30 Jun 2018
NORTHERN TRUST CORP	13F Company 13F	1%	$31,392,000 1,641,866 shares	—	30 Jun 2018
LOOMIS SAYLES & CO L P	13F Company 13F	0.94%	$29,225,000 1,528,525 shares	—	30 Jun 2018
NEW YORK STATE COMMON RETIREMENT FUND	13F Company 13F	0.89%	$27,822,000 1,455,101 shares	—	30 Jun 2018
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	0.87%	$27,222,000 1,423,792 shares	—	30 Jun 2018
WESTFIELD CAPITAL MANAGEMENT CO LP	13F Company 13F	0.85%	$26,619,000 1,392,231 shares	—	30 Jun 2018
BNP Paribas Asset Management Holding S.A.	13F Company 13F	0.83%	$25,884,000 1,353,742 shares	—	30 Jun 2018
CREDIT SUISSE AG/	13F Company 13F	0.8%	$25,133,000 1,314,546 shares	—	30 Jun 2018
NORGES BANK	13F Company 13F	0.68%	$21,373,000 1,117,833 shares	—	30 Jun 2018
Point72 Asset Management, L.P.	13F Company 13F	0.66%	$20,747,000 1,085,106 shares	—	30 Jun 2018
GOLDMAN SACHS GROUP INC	13F Company 13F	0.57%	$17,940,000 938,263 shares	—	30 Jun 2018
Penn Capital Management Company, LLC	13F Company 13F	0.55%	$17,363,000 900,856 shares	—	30 Jun 2018
Park West Asset Management LLC	13F Company 13F	0.49%	$15,448,000 807,941 shares	—	30 Jun 2018
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.44%	$13,816,000 722,555 shares	—	30 Jun 2018
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	13F Company 13F	0.38%	$11,792,000 616,747 shares	—	30 Jun 2018
Bank of New York Mellon Corp	13F Company 13F	0.38%	$11,772,000 615,650 shares	—	30 Jun 2018
BVF INC/IL	13F Company 13F	0.37%	$11,600,000 606,715 shares	—	30 Jun 2018
JPMORGAN CHASE & CO	13F Company 13F	0.35%	$10,988,000 574,669 shares	—	30 Jun 2018
Granahan Investment Management, LLC	13F Company 13F	0.32%	$9,959,000 520,888 shares	—	30 Jun 2018
CITADEL ADVISORS LLC	13F Company 13F	0.31%	$9,719,000 508,318 shares	—	30 Jun 2018
STATE OF WISCONSIN INVESTMENT BOARD	13F Company 13F	0.27%	$8,318,000 435,030 shares	—	30 Jun 2018
Gamma As Sector	13F Individual 13F	0.26%	$8,104,000 423,850 shares	—	30 Jun 2018
Brian C. Broderick	13F Individual 13F	0.23%	$7,226,000 377,933 shares	—	30 Jun 2018
UNITED SERVICES AUTOMOBILE ASSOCIATION	13F Company 13F	0.23%	$7,185,000 375,789 shares	—	30 Jun 2018
MORGAN STANLEY	13F Company 13F	0.22%	$6,903,000 361,036 shares	—	30 Jun 2018
DEUTSCHE BANK AG\	13F Company 13F	0.21%	$6,648,000 347,661 shares	—	30 Jun 2018
TIAA CREF INVESTMENT MANAGEMENT LLC	13F Company 13F	0.19%	$5,844,000 305,643 shares	—	30 Jun 2018
TEACHERS ADVISORS, LLC	13F Company 13F	0.16%	$4,879,000 255,191 shares	—	30 Jun 2018
CHICAGO EQUITY PARTNERS LLC	13F Company 13F	0.15%	$4,671,000 244,275 shares	—	30 Jun 2018
Swiss National Bank	13F Company 13F	0.15%	$4,556,000 238,300 shares	—	30 Jun 2018
TD ASSET MANAGEMENT INC	13F Company 13F	0.14%	$4,372,000 228,683 shares	—	30 Jun 2018
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM	13F Company 13F	0.14%	$4,222,000 220,825 shares	—	30 Jun 2018
UBS Group AG	13F Company 13F	0.13%	$4,207,000 220,036 shares	—	30 Jun 2018
Marshall Wace North America L.P.	13F Company 13F	0.13%	$4,201,000 219,697 shares	—	30 Jun 2018
Artal Group S.A.	13F Company 13F	0.13%	$4,147,000 216,879 shares	—	30 Jun 2018

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 Q3 2018

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

Institutions

149

144,665,764

Rows loaded

149

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 Q3 2018 vs Q2 2018 Across Filers

Q2 2018 holders

145

Q3 2018 holders

149

Holder diff

Investor	Q2 2018 Shares	Q3 2018 Shares	Share Diff	Share Chg %	Q2 2018 value	Q3 2018 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend