Company · Ownership research

Otter Tail Corp OTTR

CIK 0001466593 · CUSIP 689648103

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

This page lists the top 20 of 354 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$516.49M 6,391,447 shares	0.01%	+29.95K(+0.50%)Added	SEC filing ↗ Feb 12, 2026	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$408.86M 5,059,480 shares	0.01%	-36.60K(-0.70%)Reduced	SEC filing ↗ Jan 29, 2026	▾
03	STATE STREET CORP CIK 93751 · View history	$126.18M 1,561,440 shares	0.00%	-3.93K(-0.30%)Reduced	SEC filing ↗ Feb 13, 2026	▾
04	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$82.38M 1,019,262 shares	0.01%	+4.16K(+0.40%)Added	SEC filing ↗ Feb 9, 2026	▾
05	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$68.75M 850,729 shares	0.01%	-8.29K(-1.00%)Reduced	SEC filing ↗ Feb 12, 2026	▾
06	FIRST TRUST ADVISORS LP CIK 1125816 · View history	$65.51M 810,638 shares	0.05%	-653.98K(-44.70%)Reduced	SEC filing ↗ Feb 13, 2026	▾
07	MORGAN STANLEY CIK 895421 · Amended · View history	$45.44M 562,289 shares	0.00%	+30.60K(+5.80%)Added	SEC filing ↗ May 27, 2026	▾
08	Caisse de depot et placement du Quebec CIK 898286 · View history	$44.83M 554,733 shares	0.08%	-1.13K(-0.20%)Reduced	SEC filing ↗ Feb 17, 2026	▾
09	LSV ASSET MANAGEMENT CIK 1050470 · View history	$43.39M 536,941 shares	0.09%	+367.87K(+217.60%)Added	SEC filing ↗ Feb 6, 2026	▾
10	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$43.05M 532,691 shares	0.01%	-8.77K(-1.60%)Reduced	SEC filing ↗ Feb 13, 2026	▾
11	GABELLI FUNDS LLC CIK 1081407 · View history	$37.91M 469,100 shares	0.26%	0(0.00%)Unchanged	SEC filing ↗ Feb 5, 2026	▾
12	JPMORGAN CHASE & CO CIK 19617 · View history	$33.85M 418,928 shares	0.00%	-186.58K(-30.80%)Reduced	SEC filing ↗ Feb 11, 2026	▾
13	NORTHERN TRUST CORP CIK 73124 · View history	$33.52M 414,778 shares	0.00%	-28.09K(-6.30%)Reduced	SEC filing ↗ Feb 17, 2026	▾
14	Bank of New York Mellon Corp CIK 1390777 · View history	$28.98M 358,577 shares	0.01%	-12.71K(-3.40%)Reduced	SEC filing ↗ Feb 10, 2026	▾
15	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$27.81M 344,149 shares	0.04%	+179.15K(+108.60%)Added	SEC filing ↗ Feb 17, 2026	▾
16	GOLDMAN SACHS GROUP INC CIK 886982 · Amended · View history	$26.60M 329,157 shares	0.00%	+6.41K(+2.00%)Added	SEC filing ↗ Mar 25, 2026	▾
17	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$26.27M 325,120 shares	0.00%	-52.11K(-13.80%)Reduced	SEC filing ↗ Feb 17, 2026	▾
18	GAMCO INVESTORS, INC. ET AL CIK 807249 · View history	$22.01M 272,350 shares	0.21%	0(0.00%)Unchanged	SEC filing ↗ Feb 5, 2026	▾
19	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$21.95M 271,653 shares	0.03%	+134.03K(+97.40%)Added	SEC filing ↗ Feb 17, 2026	▾
20	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$20.06M 248,239 shares	0.02%	-11.77K(-4.50%)Reduced	SEC filing ↗ Feb 17, 2026	▾

Showing 20 / 354 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

354

Cancelled or null records excluded

Disclosed shares

28,329,159

Not deduplicated across managers

Disclosed value

$2.29B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Otter Tail Corp · Q4 2025

Explore all 354 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.