Ironwood Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US46333X1081

SecurityIRWD / Ironwood Pharmaceuticals, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership560,034 shares
Latest Disclosed Value $ 1,965,719
Mackenzie Financial Corp reports 4,751.30% increase in ownership of IRWD / Ironwood Pharmaceuticals, Inc.

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 560,034 shares of Ironwood Pharmaceuticals, Inc. (US:IRWD) valued at $1,965,719 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 11,544 shares of Ironwood Pharmaceuticals, Inc.. This represents a change in shares of 4,751.30% during the quarter. The current value of the position is $1,853,713 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 560,034 548,490 4,751.30 1,966 5,071.05 0.0024
2026-02-18 2025-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 11,544 1,084 10.36 38 192.31 0.0000
2025-11-13 2025-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 14 85.71 0.0000
2025-08-13 2025-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 8 -53.33 0.0000
2025-05-07 2025-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 15 -67.39 0.0000
2025-05-02 2024-12-31 13F/A-2 IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 46 6.98 0.0001
2025-02-20 2024-12-31 13F/A-1 IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 46 0.0001
2025-02-14 2024-12-31 13F Ironwood Pharmaceuticals Common Stock 46333X108 10,460 0 44 0.0001
2024-11-13 2024-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 43 -36.76 0.0001
2024-08-14 2024-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 68 -25.27 0.0001
2024-05-10 2024-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 91 -23.53 0.0001
2024-01-30 2023-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 -2,253 -17.72 120 -3.25 0.0002
2023-10-25 2023-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 12,713 2,253 21.54 123 13.89 0.0002
2023-08-03 2023-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 109 -1.82 0.0002
2023-04-24 2023-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 0 0.00 110 -14.73 0.0002
2023-02-14 2022-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 10,460 10,460 130 0.0002
2021-05-14 2021-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 0 -45,622 -100.00 0 -100.00
2021-02-10 2020-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 45,622 -48,694 -51.63 520 -38.68 0.0011
2020-11-13 2020-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 94,316 21,550 29.62 848 12.92 0.0021
2020-08-13 2020-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 72,766 -344 -0.47 751 1.76 0.0020
2020-05-14 2020-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 73,110 18,570 34.05 738 1.65 0.0024
2020-02-13 2019-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 54,540 -36,782 -40.28 726 -35.47 0.0018
2014-05-14 2014-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 91,322 47,637 109.05 1,125 121.89 0.0055
2014-02-11 2013-12-31 13F/A-1 IRONWOOD PHARMACEUTICALS COM CL A 46333X108 43,685 0 0.00 507 -1.93 0.0026
2014-02-03 2013-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 43,685 507
2013-11-12 2013-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 43,685 199 0.46 517 19.68 0.0026
2013-08-20 2013-06-30 13F/A-1 IRONWOOD PHARMACEUTICALS COM CL A 46333X108 43,486 43,486 432 0.0021
2013-08-09 2013-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 43,486 432
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.