Stock Ownership/OTTR

OTTER TAIL CORP (OTTR): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in OTTR · Utilities. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
21
13F filers
Aggregate Value
$187.7M
Across holders
Last Price
$92.05
2026-08-24
Sector
Utilities
GICS
Quarterly fund activity8 increased12 reduced3 exited
Full exits: Verition Fund Management LLC, MARSHALL WACE, LLP, Brevan Howard Capital Management LP
Institutional Holders of OTTR
↗
21 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund726K$65.3M34.8%0.0%Added+$5.7MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund447K$40.2M21.4%0.0%Added+$31.7MQ2 2026
GAMCO INVESTORS, INC. ET AL
CIK 0000807249
Institutional Manager265K$23.8M12.7%0.2%Reduced$-180Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 0001165408
Hedge Fund211K$18.9M10.1%0.0%Reduced$-11.8MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund72K$6.5M3.5%0.0%Reduced$-17.6MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund71K$6.4M3.4%0.0%Reduced$-5.3MQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund56K$5.0M2.7%0.0%Reduced$-517KQ2 2026
TUDOR INVESTMENT CORP ET AL
CIK 0000923093
Hedge Fund53K$4.7M2.5%0.0%Reduced$-3.0MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund36K$3.2M1.7%0.0%Reduced+$2.8MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund29K$2.6M1.4%0.0%Added+$2.5MQ2 2026
TWO SIGMA INVESTMENTS, LPAdded
Hedge Fund
$65.3M· 34.8% of total· 0.0% port· 726K sh· +$5.7M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$40.2M· 21.4% of total· 0.0% port· 447K sh· +$31.7M QoQ· Q2 2026
GAMCO INVESTORS, INC. ET ALReduced
Institutional Manager
$23.8M· 12.7% of total· 0.2% port· 265K sh· $-180 QoQ· Q2 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.Reduced
Hedge Fund
$18.9M· 10.1% of total· 0.0% port· 211K sh· $-11.8M QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$6.5M· 3.5% of total· 0.0% port· 72K sh· $-17.6M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$6.4M· 3.4% of total· 0.0% port· 71K sh· $-5.3M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$5.0M· 2.7% of total· 0.0% port· 56K sh· $-517K QoQ· Q2 2026
TUDOR INVESTMENT CORP ET ALReduced
Hedge Fund
$4.7M· 2.5% of total· 0.0% port· 53K sh· $-3.0M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$3.2M· 1.7% of total· 0.0% port· 36K sh· +$2.8M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$2.6M· 1.4% of total· 0.0% port· 29K sh· +$2.5M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$2.1M· 1.1% of total· 0.0% port· 23K sh· +$1.5M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$2.1M· 1.1% of total· 0.0% port· 23K sh· $-6.1M QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$1.5M· 0.8% of total· 0.0% port· 17K sh· +$510K QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$1.4M· 0.7% of total· 0.0% port· 16K sh· +$959K QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$1.3M· 0.7% of total· 0.0% port· 14K sh· $-2.8M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$1.2M· 0.7% of total· 0.0% port· 14K sh· — QoQ· Q2 2026
Bridgewater Associates, LPReduced
Hedge Fund
$769K· 0.4% of total· 0.0% port· 9K sh· $-599K QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$361K· 0.2% of total· 0.0% port· 4K sh· $-82K QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$73K· 0.0% of total· 0.0% port· 811 sh· $-14K QoQ· Q2 2026
Ancora Advisors, LLCUnchanged
Hedge Fund
$3K· 0.0% of total· 0.0% port· 38 sh· +$0 QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$533· 0.0% of total· 0.0% port· 6 sh· — QoQ· Q2 2026
1–10 of 21
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