Otter Tail Corporation
US ˙ NasdaqGS ˙ US6896481032

SecurityOTTR / Otter Tail Corporation
InstitutionD.a. Davidson & Co.
Latest Disclosed Ownership6,767 shares
Latest Disclosed Value $ 593,940
D.a. Davidson & Co. reports 15.30% increase in ownership of OTTR / Otter Tail Corporation

On May 5, 2026 - D.a. Davidson & Co. filed a 13F-HR form disclosing ownership of 6,767 shares of Otter Tail Corporation (US:OTTR) valued at $593,940 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 5,869 shares of Otter Tail Corporation. This represents a change in shares of 15.30% during the quarter. The current value of the position is $585,142 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)
2026-05-05 2026-03-31 13F OTTER TAIL COM 689648103 6,767 898 15.30 594 25.11 0.0036
2026-01-29 2025-12-31 13F OTTER TAIL COM 689648103 5,869 0 0.00 474 -1.46 0.0029
2025-10-22 2025-09-30 13F OTTER TAIL COM 689648103 5,869 -515 -8.07 481 -2.24 0.0031
2025-07-30 2025-06-30 13F OTTER TAIL COM 689648103 6,384 223 3.62 492 -0.61 0.0035
2025-04-28 2025-03-31 13F OTTER TAIL COM 689648103 6,161 -797 -11.45 495 -3.51 0.0040
2025-01-31 2024-12-31 13F OTTER TAIL COM 689648103 6,958 253 3.77 514 -2.10 0.0042
2024-11-13 2024-09-30 13F OTTER TAIL COM 689648103 6,705 3 0.04 524 -10.73 0.0043
2024-08-01 2024-06-30 13F OTTER TAIL COM 689648103 6,702 2 0.03 587 1.56 0.0052
2024-05-13 2024-03-31 13F OTTER TAIL COM 689648103 6,700 500 8.06 579 9.89 0.0052
2024-02-09 2023-12-31 13F OTTER TAIL COM 689648103 6,200 0 0.00 527 11.91 0.0052
2023-11-08 2023-09-30 13F OTTER TAIL COM 689648103 6,200 0 0.00 471 -3.89 0.0051
2023-08-11 2023-06-30 13F OTTER TAIL COM 689648103 6,200 0 0.00 490 9.40 0.0052
2023-04-25 2023-03-31 13F OTTER TAIL COM 689648103 6,200 -1,050 -14.48 448 4.93 0.0050
2023-02-03 2022-12-31 13F OTTER TAIL COM 689648103 7,250 1,050 16.94 426 11.52 0.0050
2022-11-07 2022-09-30 13F OTTER TAIL COM 689648103 6,200 0 0.00 382 -8.17 0.0050
2022-07-28 2022-06-30 13F OTTER TAIL COM 689648103 6,200 0 0.00 416 7.22 0.0052
2022-05-12 2022-03-31 13F OTTER TAIL COM 689648103 6,200 0 0.00 388 -12.22 0.0042
2022-01-31 2021-12-31 13F OTTER TAIL COM 689648103 6,200 0 0.00 442 27.38 0.0047
2021-11-15 2021-09-30 13F OTTER TAIL COM 689648103 6,200 0 0.00 347 14.52 0.0040
2021-08-10 2021-06-30 13F OTTER TAIL COM 689648103 6,200 500 8.77 303 15.21 0.0036
2021-05-07 2021-03-31 13F OTTER TAIL COM 689648103 5,700 0 0.00 263 8.23 0.0034
2021-02-10 2020-12-31 13F OTTER TAIL COM 689648103 5,700 0 0.00 243 17.96 0.0037
2020-11-02 2020-09-30 13F OTTER TAIL COM 689648103 5,700 0 0.00 206 -6.79 0.0036
2020-08-10 2020-06-30 13F OTTER TAIL COM 689648103 5,700 0 0.00 221 -13.33 0.0041
2020-05-05 2020-03-31 13F OTTER TAIL COM 689648103 5,700 -1,000 -14.93 255 -25.66 0.0050
2020-02-14 2019-12-31 13F OTTER TAIL COM 689648103 6,700 2,200 48.89 343 41.74 0.0055
2019-11-05 2019-09-30 13F OTTER TAIL COM 689648103 4,500 500 12.50 242 14.69 0.0043
2019-08-13 2019-06-30 13F OTTER TAIL COM 689648103 4,000 4,000 211 0.0039
2017-11-08 2017-09-30 13F OTTER TAIL COM 689648103 0 -4,000 -100.00 0 -100.00
2017-08-11 2017-06-30 13F OTTER TAIL COM 689648103 4,000 0 0.00 158 4.64 0.0036
2017-05-12 2017-03-31 13F OTTER TAIL COM 689648103 4,000 0 0.00 151 -7.36 0.0037
2017-02-15 2016-12-31 13F OTTER TAIL COM 689648103 4,000 0 0.00 163 18.12 0.0037
2016-11-18 2016-09-30 13F/A-1 OTTER TAIL COM 689648103 4,000 3,850 2,566.67 138 2,660.00 0.0034
2016-11-14 2016-09-30 13F OTTER TAIL COM 689648103 4,000 138
2016-08-13 2016-06-30 13F OTTER TAIL COM 689648103 150 -75 -33.33 5 -16.67 0.0001
2016-05-13 2016-03-31 13F OTTER TAIL COM 689648103 225 225 0.00 6 0.0002
2016-02-12 2015-12-31 13F OTTER TAIL COM 689648103 0 0 0 0.0000
2015-05-06 2015-03-31 13F OTTER TAIL COM 689648103 0 -200 -100.00 0 -100.00
2015-02-12 2014-12-31 13F OTTER TAIL COM 689648103 200 0 0.00 6 20.00 0.0002
2014-11-12 2014-09-30 13F OTTER TAIL COM 689648103 200 0 0.00 5 -16.67 0.0002
2014-07-29 2014-06-30 13F OTTER TAIL COM 689648103 200 -100 -33.33 6 -33.33 0.0002
2014-05-05 2014-03-31 13F OTTER TAIL COM 689648103 300 0 0.00 9 12.50 0.0003
2014-02-13 2013-12-31 13F/A-1 OTTER TAIL COM 689648103 300 0 0.00 8 0.00 0.0003
2014-02-12 2013-12-31 13F OTTER TAIL COM 689648103 300 8
2013-11-14 2013-09-30 13F OTTER TAIL COM 689648103 300 0 0.00 8 0.00 0.0004
2013-08-16 2013-06-30 13F OTTER TAIL COM 689648103 300 300 8 0.0004
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.