IRWD · Ironwood Pharmaceuticals Inc · Shareholders & Ownership
Every disclosed holder of IRWD in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns IRWD
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 160,847,164 | 97.34% |
| Insiders (Forms 3, 4, 5) | 7,133,065 | 4.32% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 2,740,282 | -1.66% |
| Registered funds (N-PORT, not summed) | 51,144,843 | 30.95% |
Shares outstanding: 165,239,947, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of IRWD
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
17,788,557 | ||
| 1.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
13,373,568 | ||
| 1.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
4,262,458 | ||
| 1.3 |
iShares Russell 2000 Growth ETF
Fund
S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,413,903 | ||
| 1.4 |
iShares Biotechnology ETF
Fund
S000004350 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
1,116,521 | ||
| 1.5 |
BlackRock Advantage Small Cap Core Fund
Fund
S000039982 · Registered fund · May 29, 2026
BlackRock Funds, not summed
|
833,504 | ||
| 2 |
ARMISTICE CAPITAL, LLC
13F
CIK 1601086 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
13,932,000 | ||
| 2.1 |
ARMISTICE CAPITAL, LLC
13G
CIK 1601086 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
13,932,000 | ||
| 3 |
Sarissa Capital Management LP
13F
CIK 1577524 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
9,188,635 | ||
| 4 |
|
8,809,601 | ||
| 4.1 |
STATE STREET CORP
13G
CIK 93751 · Bank · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
8,809,601 | ||
| 4.2 |
State Street(R) SPDR(R) S&P(R) Biotech ETF
Fund
S000010018 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
5,499,839 | ||
| 4.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
60,678 | ||
| 4.4 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
4,327 | ||
| 4.5 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
922 | ||
| 5 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
8,683,803 | ||
| 6 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
7,993,226 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,608,508 | ||
| 8 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
6,465,921 | ||
| 8.1 |
AQR Small Cap Multi-Style Fund
Fund
S000040064 · Registered fund · Jun 30, 2026
AQR Funds, not summed
|
254,364 | ||
| 8.2 |
AQR Small Cap Momentum Style Fund
Fund
S000025644 · Registered fund · Mar 31, 2026
AQR Funds, not summed
|
14,156 | ||
| 9 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,853,331 | ||
| 10 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,513,355 | ||
| 11 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,831,657 | ||
| 12 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
4,781,484 | ||
| 13 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,556,089 | ||
| 14 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,290,093 | ||
| 15 |
JACOBS LEVY EQUITY MANAGEMENT, INC
13F
CIK 884414 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
4,065,964 | ||
| 16 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,313,808 | ||
| 16.1 |
Goldman Sachs Small Cap Growth Insights Fund
Fund
S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
87,852 | ||
| 16.2 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
73,969 | ||
| 16.3 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
69,155 | ||
| 16.4 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
27,789 | ||
| 16.5 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
16,973 | ||
| 17 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,302,242 | ||
| 17.1 |
Schwab Fundamental U.S. Small Company ETF
Fund
S000040878 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
2,465,723 | ||
| 17.2 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
689,826 | ||
| 17.3 |
Schwab Fundamental U.S. Small Company Index Fund
Fund
S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
420,307 | ||
| 17.4 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
398,128 | ||
| 17.5 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
95,218 | ||
| 18 |
FEDERATED HERMES, INC.
13F
CIK 1056288 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,231,238 | ||
| 19 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,017,089 | ||
| 20 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,522,891 | ||
| 20.1 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
634,531 | ||
| 20.2 |
U.S. MICRO CAP PORTFOLIO
Fund
S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
538,751 | ||
| 20.3 |
Dimensional U.S. Small Cap ETF
Fund
S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
534,999 | ||
| 20.4 |
Dimensional U.S. Core Equity 2 ETF
Fund
S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
272,518 | ||
| 20.5 |
U.S. CORE EQUITY 2 PORTFOLIO
Fund
S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
88,288 | ||
| 21 |
MACKENZIE FINANCIAL CORP
13F
CIK 919859 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,367,493 | ||
| 22 |
|
1,898,838 | ||
| 23 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,859,914 | ||
| 24 |
VANGUARD STRATEGIC EQUITY FUND
Fund
S000002593 · Registered fund · Jun 30, 2026
VANGUARD HORIZON FUNDS, not summed
|
1,833,231 | ||
| 25 |
Connor, Clark & Lunn Investment Management Ltd.
13F
CIK 1596800 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,811,714 | ||
| 26 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
1,677,797 | ||
| 27 |
VANGUARD EXPLORER FUND
Fund
S000002578 · Registered fund · Jul 31, 2026
VANGUARD EXPLORER FUND, not summed
|
1,403,741 | ||
| 28 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,373,974 | ||
| 28.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
84,236 | ||
| 28.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
27,227 | ||
| 29 |
Federated Hermes MDT Small Cap Core Fund
Fund
S000012972 · Registered fund · Jul 31, 2026
Federated Hermes MDT Series, not summed
|
1,286,341 | ||
| 30 |
Hillsdale Investment Management Inc.
13F
CIK 1368465 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,250,428 | ||
| 31 |
WELLS FARGO & COMPANY/MN
13F
CIK 72971 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,206,198 | ||
| 32 |
DEUTSCHE BANK AG\
13F
CIK 948046 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,158,138 | ||
| 32.1 |
DWS Small Cap Index VIP
Fund
S000006223 · Registered fund · Jun 30, 2026
DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed
|
25,705 | ||
| 33 |
Pacer Advisors, Inc.
13F
CIK 1616667 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,095,513 | ||
| 34 |
Pacer US Small Cap Cash Cows 100 ETF
Fund
S000055468 · Registered fund · Jul 31, 2026
Pacer Funds Trust, not summed
|
1,079,411 | ||
| 35 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,040,335 | ||
| 36 |
FRANKLIN RESOURCES INC
13F
CIK 38777 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,006,979 | ||
| 36.1 |
Franklin Small Cap Enhanced ETF
Fund
S000097279 · Registered fund · Jun 30, 2026
Franklin Templeton ETF Trust, not summed
|
161,157 | ||
| 36.2 |
Putnam Dynamic Asset Allocation Growth Fund
Fund
S000000780 · Registered fund · Jun 30, 2026
Putnam Asset Allocation Funds, not summed
|
104,715 | ||
| 36.3 |
Putnam Dynamic Asset Allocation Balanced Fund
Fund
S000000778 · Registered fund · Jun 30, 2026
Putnam Asset Allocation Funds, not summed
|
72,370 | ||
| 36.4 |
Putnam Dynamic Asset Allocation Conservative Fund
Fund
S000000779 · Registered fund · Jun 30, 2026
Putnam Asset Allocation Funds, not summed
|
11,279 | ||
| 36.5 |
Franklin U.S. Small Cap Multifactor Index ETF
Fund
S000057202 · Registered fund · Jun 30, 2026
Franklin Templeton ETF Trust, not summed
|
8,589 | ||
| 37 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
909,488 | ||
| 37.1 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
1,790,034 | ||
| 37.2 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
740,842 | ||
| 37.3 |
Fidelity Enhanced Small Cap Core ETF
Fund
S000081807 · Registered fund · Jun 30, 2026
Fidelity Covington Trust, not summed
|
740,102 | ||
| 37.4 |
Fidelity Small-Mid Multifactor ETF
Fund
S000064786 · Registered fund · Jul 31, 2026
Fidelity Covington Trust, not summed
|
466,785 | ||
| 37.5 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
269,516 | ||
| 38 |
Bridge Builder Small/Mid Cap Growth Fund
Fund
S000048336 · Registered fund · Jun 30, 2026
Bridge Builder Trust, not summed
|
904,987 | ||
| 39 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
823,033 | ||
| 40 |
STATE OF WISCONSIN INVESTMENT BOARD
13F
CIK 854157 · Pension or benefit plan · Jun 30, 2026
carried, not yet filed for the newest quarter
|
778,515 | ||
| 41 |
Federated Hermes MDT Small Cap Growth Fund
Fund
S000012973 · Registered fund · Jul 31, 2026
Federated Hermes MDT Series, not summed
|
732,361 | ||
| 42 |
RAYMOND JAMES FINANCIAL INC
13F
CIK 720005 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
725,085 | ||
| 43 |
|
676,900 | ||
| 44 |
VICTORY CAPITAL MANAGEMENT INC
13F
CIK 1040188 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
658,457 | ||
| 44.1 |
VictoryShares Small Cap Free Cash Flow ETF
Fund
S000080690 · Registered fund · Jun 30, 2026
Victory Portfolios II, not summed
|
487,698 | ||
| 44.2 |
Victory Small Cap Stock Fund
Fund
S000012914 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
|
146,579 | ||
| 44.3 |
Victory Extended Market Index Fund
Fund
S000012941 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
|
18,297 | ||
| 44.4 |
Victory Cornerstone Aggressive Fund
Fund
S000037226 · Registered fund · May 31, 2026
Victory Portfolios III, not summed
|
6,158 | ||
| 45 |
|
658,037 | ||
| 46 |
Inspire Investing, LLC
13F
CIK 1670139 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
630,072 | ||
| 46.1 |
Inspire Fidelis Multi Factor ETF
Fund
S000076870 · Registered fund · May 31, 2026
Northern Lights Fund Trust IV, not summed
|
566,621 | ||
| 47 |
HRT FINANCIAL LP
13F
CIK 1475597 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
577,337 | ||
| 48 |
IEQ CAPITAL, LLC
13F
CIK 1779789 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
561,588 | ||
| 49 |
Vanguard Global Advisers, LLC
13F
CIK 1811242 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
561,038 | ||
| 50 |
PRUDENTIAL FINANCIAL INC
13F
CIK 1137774 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
537,199 |
37 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 327 holders
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