Ironwood Pharmaceuticals, Inc.
US ˙ NasdaqGS ˙ US46333X1081

SecurityIRWD / Ironwood Pharmaceuticals, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership540,864 shares
Latest Disclosed Value $ 1,898,433
Man Group plc reports 1,034.86% increase in ownership of IRWD / Ironwood Pharmaceuticals, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 540,864 shares of Ironwood Pharmaceuticals, Inc. (US:IRWD) valued at $1,898,433 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 47,659 shares of Ironwood Pharmaceuticals, Inc.. This represents a change in shares of 1,034.86% during the quarter. The current value of the position is $1,752,399 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)
2026-05-15 2026-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 540,864 493,205 1,034.86 1,898 1,086.25 0.0021
2026-02-17 2025-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 47,659 47,659 161 0.0003
2025-11-14 2025-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 0 -234,257 -100.00 0 -100.00
2025-08-14 2025-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 234,257 -99,461 -29.80 168 -65.71 0.0003
2025-05-15 2025-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 333,718 -21,106 -5.95 491 -68.81 0.0012
2025-02-14 2024-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 354,824 -539,902 -60.34 1,572 -57.38 0.0041
2024-11-14 2024-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 894,726 -2,089,725 -70.02 3,686 -81.06 0.0096
2024-08-14 2024-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 2,984,451 -862 -0.03 19,459 -25.17 0.0491
2024-05-15 2024-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 2,985,313 1,559,924 109.44 26,002 59.46 0.0656
2024-02-14 2023-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 1,425,389 16,306 -37.13 0.0454
2023-11-14 2023-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 25,939 -18.09 0.0804
2023-08-14 2023-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 2,976,050 31,665 116.76 0.0977
2023-05-15 2023-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 14,608 -14.84 0.0520
2023-02-14 2022-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 1,384,470 546,193 65.16 17,154 97.52 0.0615
2022-11-14 2022-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 838,277 8,684 265.80 0.0403
2022-08-15 2022-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 2,374 -12.72 0.0101
2022-05-16 2022-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 216,309 -66,685 -23.56 2,720 -17.58 0.0095
2022-02-14 2021-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 282,994 -16,489 -5.51 3,300 -15.60 0.0106
2021-11-15 2021-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 299,483 -95,551 -24.19 3,910 -23.09 0.0137
2021-08-16 2021-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 395,034 208,808 112.13 5,084 144.19 0.0179
2021-05-17 2021-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 186,226 -1,531,745 -89.16 2,082 -89.36 0.0092
2021-02-16 2020-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 1,717,971 -307,697 -15.19 19,567 7.39 0.0859
2020-11-16 2020-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 2,025,668 1,154,168 132.43 18,221 102.59 0.0717
2020-08-14 2020-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 871,500 79,637 10.06 8,994 12.57 0.0454
2020-05-15 2020-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 791,863 621,395 364.52 7,990 252.14 0.0518
2020-02-18 2019-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 170,468 170,468 2,269 0.0075
2019-08-14 2019-06-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 0 -89,627 -100.00 0 -100.00
2019-05-15 2019-03-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 89,627 53,654 149.15 1,212 224.93 0.0046
2019-02-14 2018-12-31 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 35,973 -91,529 -71.79 373 -84.15 0.0017
2018-11-14 2018-09-30 13F IRONWOOD PHARMACEUTICALS COM CL A 46333X108 127,502 127,502 2,354 0.0086
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.