State Street Corporation reported beneficial ownership of Ironwood Pharmaceuticals common stock on a passive Schedule 13G. State Street and its investment management subsidiaries reported beneficial ownership of 8,809,601 shares of common stock, representing 5.4% of the outstanding class.
The filing states 0 shares with sole voting or dispositive power and 8,588,456 shares with shared voting power, and 8,809,601 shares with shared dispositive power. The shares are held through entities including SSGA Funds Management, Inc., State Street Global Advisors Europe Limited, and State Street Global Advisors Trust Company.
Positive
None.
Negative
None.
Key Figures
Shares beneficially owned:8,809,601 sharesPercent of class:5.4%Shared voting power:8,588,456 shares+3 more
6 metrics
Shares beneficially owned8,809,601 sharesIronwood Pharmaceuticals common stock beneficially owned by State Street Corporation
Percent of class5.4%Portion of Ironwood Pharmaceuticals common stock class beneficially owned
Shared voting power8,588,456 sharesShares over which State Street has shared power to vote or direct the vote
Shared dispositive power8,809,601 sharesShares over which State Street has shared power to dispose or direct disposition
Sole voting power0 sharesShares with sole power to vote or direct the vote
Sole dispositive power0 sharesShares with sole power to dispose or direct disposition
Key Terms
beneficially owned, shared voting power, shared dispositive power, investment company
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
shared voting powerfinancial
"Shared Voting Power 8,588,456.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
shared dispositive powerfinancial
"Shared Dispositive Power 8,809,601.00"
investment companyfinancial
"shareholders of an investment company registered under the Investment Company Act of 1940"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How much of Ironwood Pharmaceuticals (IRWD) stock does State Street Corporation own?
State Street Corporation reports beneficial ownership of 8,809,601 Ironwood Pharmaceuticals common shares, representing 5.4% of the outstanding class, with all of these shares held with shared dispositive power through its investment management subsidiaries.
What voting power does State Street have over IRWD shares?
State Street reports no sole voting power and shared voting power over 8,588,456 Ironwood shares. It has shared dispositive power over 8,809,601 shares, reflecting its role as an institutional investment manager.
Which State Street entities hold Ironwood Pharmaceuticals (IRWD) shares?
The filing identifies SSGA Funds Management, Inc., State Street Global Advisors Europe Limited, and State Street Global Advisors Trust Company as investment adviser subsidiaries through which State Street’s beneficial ownership of Ironwood common stock is held.
Is State Street’s Ironwood Pharmaceuticals (IRWD) stake over 5%?
Yes. State Street Corporation reports beneficial ownership of 5.4% of Ironwood’s common stock, based on 8,809,601 shares. This level of ownership triggers the requirement to file a Schedule 13G as a significant shareholder.
Does any other person have rights to income from State Street’s IRWD shares?
The filing states “NOT APPLICABLE” under the item addressing others’ rights to dividends or sale proceeds, indicating no specific other person is identified as having such rights for more than 5% of the class.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
IRONWOOD PHARMACEUTICALS INC
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
46333X108
(CUSIP Number)
06/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
46333X108
1
Names of Reporting Persons
STATE STREET CORPORATION
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
8,588,456.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
8,809,601.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
8,809,601.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.4 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
IRONWOOD PHARMACEUTICALS INC
(b)
Address of issuer's principal executive offices:
100 SUMMER STREET SUITE 2300, BOSTON, MASSACHUSETTS, 02110
Item 2.
(a)
Name of person filing:
STATE STREET CORPORATION;
(b)
Address or principal business office or, if none, residence:
ONE CONGRESS STREET, SUITE 1, BOSTON MA 02114, UNITED STATES
(c)
Citizenship:
MA
(d)
Title of class of securities:
COMMON STOCK
(e)
CUSIP Number(s):
46333X108
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
8809601.00
(b)
Percent of class:
5.4 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
8,588,456
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
8,809,601
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
NOT APPLICABLE
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
SSGA FUNDS MANAGEMENT, INC. (IA);STATE STREET GLOBAL ADVISORS EUROPE LIMITED (IA);STATE STREET GLOBAL ADVISORS TRUST COMPANY (IA);
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
NOT APPLICABLE
Item 9.
Notice of Dissolution of Group.
Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5.
NOT APPLICABLE
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
