$IRWD

$3.51 +$0.01 (0.29%) Close

$IRWD Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 165.2M shares outstanding

Who owns IRWD?

By type of holder

Institutions 97.1% Insiders 0.7% Everyone else 2.2%

Concentration Top 10 holders own 55.0%

BlackRock, Inc. 10.8% · Armistice Capital, LLC 8.4%

Institutional ownership

97.1%

-0.5 pts vs last qtr

Institutional holders

211

-15 vs last qtr

Net shares bought

−918.5K

by institutions in Q2 2026

New / sold out

24 / 39

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +4.4M
Mackenzie Financial Corp +1.8M

Biggest sellers in Q2 2026

Susquehanna International Group, LLP SOLD OUT −1.5M
Charles Schwab Investment Management Inc −1.4M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.51M

10 notices from 7 people

Shares covered

560.1K

0.34% of the company

Arranged in advance

32%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

MCCOURT Thomas A Officer $840K
Ronald Silver Officer 10b5-1 $711K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2010–FY2025

+81.8%

+6.87% a year

Each share's claim on the business

−45.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$151M vs $251M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years61% 3–5 years6% 1–3 years24% Under 1 year9%

Quarterly turnover

10.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting IRWD on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	17.8M	10.77%	+4.4M (+33.1%)	≤2021	0.0%
Shares held by quarter Peak holding23.1M (Q4'24) Change over 8 quarters−5.2M Share of the company10.770% BlackRock, Inc.'s full portfolio →
AC Armistice Capital, LLC	13.9M	8.43%	−1.1M (−7.3%)	2023	0.7%
Shares held by quarter Peak holding16.2M (Q2'25) Change over 8 quarters+5.7M Share of the company8.430% Armistice Capital, LLC's full portfolio →

BlackRock, Inc.

17.8M

% of company

10.77%

Change vs last qtr

+4.4M (+33.1%)

Held since

≤2021

Armistice Capital, LLC

13.9M

% of company

8.43%

Change vs last qtr

−1.1M (−7.3%)

Held since

2023

28 more super investors behind a free account

See every manager holding Ironwood Pharmaceuticals, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting IRWD on Form N-PORT; together they hold 32.1% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$23.2M	5.5M	3.33%	0.22%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$20.1M	4.8M	2.89%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$23.2M

% of company

3.33%

% of the fund

0.22%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$20.1M

% of company

2.89%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Ironwood Pharmaceuticals, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SM Shetzline Michael Insider	521.4K	0.32%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.320% Shetzline Michael's insider activity →
SR Silver Ronald Insider	441.6K	0.27%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.270% Silver Ronald's insider activity →

Shetzline Michael

Insider

521.4K

% of company

0.32%

Change vs last qtr

—

Held since

—

Silver Ronald

Insider

441.6K

% of company

0.27%

Change vs last qtr

—

Held since

—

1 more holders behind a free account

See every insider and 5%+ holder of Ironwood Pharmaceuticals, Inc..

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