Otter Tail Corporation
US ˙ NasdaqGS ˙ US6896481032

SecurityOTTR / Otter Tail Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership15,542 shares
Latest Disclosed Value $ 1,364,277
Janus Henderson Group Plc ownership in OTTR / Otter Tail Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 15,542 shares of Otter Tail Corporation (US:OTTR) valued at $1,364,121 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,542 shares of Otter Tail Corporation. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,343,917 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)
2026-05-18 2026-03-31 13F/A-1 OTTER TAIL COM 689648103 15,542 0 0.00 1,364 8.60 0.0002
2026-05-15 2026-03-31 13F OTTER TAIL COM 689648103 15,542 0 1,364 0.0003
2026-02-17 2025-12-31 13F OTTER TAIL COM 689648103 15,542 0 0.00 1,256 -1.41 0.0006
2025-11-14 2025-09-30 13F OTTER TAIL COM 689648103 15,542 856 5.83 1,275 12.64 0.0006
2025-08-14 2025-06-30 13F OTTER TAIL COM 689648103 14,686 -11,498 -43.91 1,132 -46.47 0.0006
2025-05-15 2025-03-31 13F OTTER TAIL COM 689648103 26,184 1,011 4.02 2,114 13.72 0.0012
2025-02-14 2024-12-31 13F OTTER TAIL COM 689648103 25,173 1,695 7.22 1,859 1.31 0.0009
2024-11-14 2024-09-30 13F OTTER TAIL COM 689648103 23,478 966 4.29 1,835 -6.95 0.0009
2024-08-14 2024-06-30 13F OTTER TAIL COM 689648103 22,512 -7,253 -24.37 1,972 -23.37 0.0011
2024-05-15 2024-03-31 13F OTTER TAIL COM 689648103 29,765 9,270 45.23 2,572 47.65 0.0014
2024-02-14 2023-12-31 13F OTTER TAIL COM 689648103 20,495 -955 -4.45 1,742 7.07 0.0010
2023-11-14 2023-09-30 13F OTTER TAIL COM 689648103 21,450 730 3.52 1,628 -0.49 0.0011
2023-08-14 2023-06-30 13F OTTER TAIL COM 689648103 20,720 442 2.18 1,635 11.60 0.0010
2023-05-15 2023-03-31 13F OTTER TAIL COM 689648103 20,278 11,310 126.12 1,465 178.52 0.0010
2023-02-14 2022-12-31 13F OTTER TAIL COM 689648103 8,968 393 4.58 526 -0.19 0.0004
2022-11-14 2022-09-30 13F OTTER TAIL COM 689648103 8,575 326 3.95 527 -5.05 0.0004
2022-08-15 2022-06-30 13F OTTER TAIL COM 689648103 8,249 201 2.50 555 10.34 0.0004
2022-05-16 2022-03-31 13F OTTER TAIL COM 689648103 8,048 960 13.54 503 -0.59 0.0002
2022-02-14 2021-12-31 13F OTTER TAIL COM 689648103 7,088 7,088 506 0.0002
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.