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OTTR · Otter Tail Corp · Shareholders & Ownership

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$89.86 +0.99 (+1.11%) At close · Oct 20
Market Cap
$3.73B
Shares
41.99M
Volume · Oct 20 146.98K Avg daily vol (3M) 225.52K

Every disclosed holder of OTTR in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns OTTR

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions
Holder group Shares % Out
Institutional (13F) 29,600,213 70.50%
Insiders (Forms 3, 4, 5) 693,623 1.65%
13D/G-only blocks 2,973,337 7.08%
Remaining 8,718,407 20.77%
Registered funds (N-PORT, not summed) 16,330,599 38.90%

Shares outstanding: 41,985,580, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of OTTR

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
6,557,596
1.1
iShares Core S&P Small-Cap ETF
Fund S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
2,529,498
1.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
1,003,879
1.3
iShares Russell 2000 Value ETF
Fund S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
369,337
1.4
iShares S&P Small-Cap 600 Value ETF
Fund S000004316 · Registered fund · Jun 30, 2026
iShares Trust, not summed
198,808
1.5
iShares S&P Small-Cap 600 Growth ETF
Fund S000004314 · Registered fund · Jun 30, 2026
iShares Trust, not summed
169,631
2
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
2,996,322
3
Cascade Investment, L.L.C.
13D CIK 1052192 · Unknown · Oct 1, 2024
2,973,337
4
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,891,243
5
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,645,782
5.1
STATE STREET CORP
13G CIK 93751 · Bank · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
2,148,193
5.2
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
383,708
5.3
State Street(R) SPDR(R) S & P 600(TM) Small Cap Value ETF
Fund S000006974 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
119,683
5.4
State Street(R) SPDR(R) S & P 600(TM) Small Cap Growth ETF
Fund S000006990 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
105,496
5.5
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
13,676
6
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,336,455
7
LSV ASSET MANAGEMENT
13F CIK 1050470 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,186,461
7.1
LSV Small Cap Value Fund
Fund S000039922 · Registered fund · Jul 31, 2026
ADVISORS' INNER CIRCLE FUND, not summed
53,090
8
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,112,886
9
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
963,651
10
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
885,376
10.1
E*TRADE No Fee Total Market Index Fund
Fund S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
23
11
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
828,016
11.1
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
225,432
11.2
U.S. MICRO CAP PORTFOLIO
Fund S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
158,019
11.3
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
139,112
11.4
U.S. CORE EQUITY 2 PORTFOLIO
Fund S000000980 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
49,471
11.5
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
48,762
12
TWO SIGMA INVESTMENTS, LP
13F CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
725,769
13
FIRST TRUST ADVISORS LP
13F CIK 1125816 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
637,043
13.1
FT Vest SMID Rising Dividend Achievers Target Income ETF
Fund S000081275 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded Fund IV, not summed
42,594
13.2
First Trust Small Cap Core AlphaDEX Fund
Fund S000017339 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
38,779
13.3
First Trust/Dow Jones Dividend & Income Allocation Portfolio
Fund S000036417 · Registered fund · Jun 30, 2026
First Trust Variable Insurance Trust, not summed
27,783
13.4
First Trust Small Cap Value AlphaDEX Fund
Fund S000031807 · Registered fund · Jul 31, 2026
First Trust Exchange-Traded AlphaDEX Fund, not summed
10,625
13.5
First Trust SMID Capital Strength ETF
Fund S000058147 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund VI, not summed
6,638
14
VANGUARD SMALL-CAP VALUE INDEX FUND
Fund S000002847 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
609,934
15
First Trust SMID Cap Rising Dividend Achievers ETF
Fund S000059604 · Registered fund · Jun 30, 2026
First Trust Exchange-Traded Fund VI, not summed
540,392
16
Caisse de depot et placement du Quebec
13F CIK 898286 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
539,873
17
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
519,756
17.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
201,704
17.2
Schwab Fundamental U.S. Small Company ETF
Fund S000040878 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
105,048
17.3
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
94,760
17.4
Schwab Fundamental U.S. Small Company Index Fund
Fund S000016767 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
27,867
17.5
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
24,841
18
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
481,289
19
GABELLI FUNDS LLC
13F CIK 1081407 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
462,200
19.1
The Gabelli Utilities Fund
Fund S000001075 · Registered fund · Jun 30, 2026
Gabelli Utilities Fund, not summed
386,600
19.2
The Gabelli Small Cap Growth Fund
Fund S000001062 · Registered fund · Jun 30, 2026
Gabelli Equity Series Funds Inc, not summed
9,100
20
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
453,446
20.1
Small Cap Value Fund
Fund S000001246 · Registered fund · Jun 30, 2026
Northern Funds, not summed
31,940
20.2
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
19,780
20.3
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
6,404
20.4
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
2,844
21
D. E. Shaw & Co., Inc.
13F CIK 1009207 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
447,021
22
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
358,275
22.1
BNY Mellon US Small Cap Core Equity ETF
Fund S000067262 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
1,421
23
MACFARLANE CHARLES S
Insider CIK 1278053 · Feb 11, 2026
President & CEO, issuer-wide
327,056
24
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
315,978
25
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
312,589
26
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
281,486
27
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
278,778
28
VICTORY CAPITAL MANAGEMENT INC
13F CIK 1040188 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
276,060
28.1
VictoryShares US Small Mid Cap Value Momentum ETF
Fund S000065161 · Registered fund · Jun 30, 2026
Victory Portfolios II, not summed
117,513
28.2
Victory Market Neutral Income Fund
Fund S000037769 · Registered fund · Jun 30, 2026
Victory Portfolios II, not summed
98,364
28.3
VictoryShares US Small Cap High Div Volatility Wtd ETF
Fund S000049908 · Registered fund · Jun 30, 2026
Victory Portfolios II, not summed
40,510
28.4
Victory Extended Market Index Fund
Fund S000012941 · Registered fund · Jul 31, 2026
Victory Portfolios III, not summed
4,415
28.5
VictoryShares Hedged Equity Income ETF
Fund S000085473 · Registered fund · Dec 31, 2025
Victory Portfolios II, not summed
464
29
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
268,456
29.1
College Retirement Equities Fund - Total Global Stock Account
Fund S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
100,970
29.2
Nuveen Small Cap Value Fund
Fund S000005570 · Registered fund · Jul 31, 2026
Nuveen Investment Funds, Inc., not summed
50,309
29.3
Nuveen Small Cap Blend Index Fund
Fund S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
50,228
29.4
Nuveen Equity Index Fund
Fund S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
34,701
29.5
Nuveen Life Stock Index Fund
Fund S000005094 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
525
30
GAMCO INVESTORS, INC. ET AL
13F CIK 807249 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
264,798
31
VANGUARD UTILITIES INDEX FUND
Fund S000004445 · Registered fund · May 31, 2026
VANGUARD WORLD FUND, not summed
262,521
32
PRICE T ROWE ASSOCIATES INC /MD/
13F CIK 80255 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
260,050
32.1
T. Rowe Price Integrated U.S. Small-Mid Cap Core Equity Fund
Fund S000052904 · Registered fund · Jun 30, 2026
T. ROWE PRICE INTEGRATED EQUITY FUNDS, INC., not summed
59,272
32.2
T. Rowe Price Extended Equity Market Index Fund
Fund S000002090 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
6,824
32.3
T. Rowe Price Small-Cap Index Fund
Fund S000051327 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
5,899
32.4
T. Rowe Price Total Equity Market Index Fund
Fund S000002091 · Registered fund · Jun 30, 2026
T. ROWE PRICE INDEX TRUST, INC., not summed
3,345
33
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
249,295
33.1
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
7,078
33.2
Goldman Sachs Absolute Return Tracker Fund
Fund S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
2,722
34
VANGUARD DIVIDEND APPRECIATION INDEX FUND
Fund S000011322 · Registered fund · Jul 31, 2026
VANGUARD SPECIALIZED FUNDS, not summed
237,579
35
PRINCIPAL FINANCIAL GROUP INC
13F CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
233,558
35.1
SmallCap S&P 600 Index Fund
Fund S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
30,932
35.2
Principal U.S. Small-Cap ETF
Fund S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
30,371
35.3
SmallCap Value Fund II
Fund S000007169 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
14,899
36
1290 VT GAMCO Small Company Value Portfolio
Fund S000009151 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
223,500
37
ADAGE CAPITAL PARTNERS GP, L.L.C.
13F CIK 1165408 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
210,546
38
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
199,684
38.1
Invesco RAFI US 1500 Small-Mid ETF
Fund S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
29,585
38.2
Invesco S&P SmallCap Low Volatility ETF
Fund S000030965 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
23,637
38.3
Invesco S&P SmallCap 600 Revenue ETF
Fund S000064596 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
16,913
38.4
Invesco S&P SmallCap Utilities & Communication Services ETF
Fund S000028295 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
7,235
38.5
Invesco S&P SmallCap High Dividend Low Volatility ETF
Fund S000055539 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
6,615
39
VANGUARD RUSSELL 2000 INDEX FUND
Fund S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
198,040
40
Public Sector Pension Investment Board
13F CIK 1396318 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
195,071
41
ROYAL BANK OF CANADA
13F CIK 1000275 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
185,376
42
FEDERATED HERMES, INC.
13F CIK 1056288 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
174,664
43
CONGRESS ASSET MANAGEMENT CO
13F CIK 897378 · Registered investment adviser · Sep 30, 2026
165,683
44
VANGUARD HIGH DIVIDEND YIELD INDEX FUND
Fund S000014011 · Registered fund · Jul 31, 2026
VANGUARD WHITEHALL FUNDS, not summed
153,958
45
VANGUARD S&P SMALL-CAP 600 INDEX FUND
Fund S000030017 · Registered fund · May 31, 2026
VANGUARD ADMIRAL FUNDS, not summed
144,953
46
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
135,671
47
Bank & Trust Co
13F CIK 2026082 · Unknown · Sep 30, 2026
117,295
48
RHUMBLINE ADVISERS
13F CIK 1115418 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
104,092
49
US BANCORP \DE\
13F CIK 36104 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
100,662
50
Federated Hermes MDT Small Cap Core Fund
Fund S000012972 · Registered fund · Jul 31, 2026
Federated Hermes MDT Series, not summed
98,912

31 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 524 holders

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Key facts CIK 1466593 CUSIP 689648103 13F (30d) 46 filings 46 filers Visit website Investor relations