ADAGE CAPITAL PARTNERS GP, L.L.C.

Position in OTTR — Otter Tail Corp

CIK 1165408 Boston, MA

Position in OTTR

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$18,944,929

-$11,072,411 QoQ

Shares Held

210,546

-38.4% QoQ

Ownership

0.501%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#26

of 362 holders

Holding Since

Mar 2021

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Industrials · as of Jun 30, 2026

ADAGE CAPITAL PARTNERS GP, L.L.C. holds $202,856,501 across 4 Conglomerates names. OTTR ranks #3 (9.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MMM	3M Co	863,485	$139,806,856
2	HON	Honeywell International Inc	130,576	$29,235,966
3	OTTR	Otter Tail Corp This page	210,546	$18,944,929
4	TUSK	Mammoth Energy Services, Inc.	4,575,000	$14,868,750

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$18,944,929	210,546	-38.4%	Shares	Sole	2026-08-14
2026-03-31	$30,017,340	342,000	-0.6%	Shares	Sole	2026-05-15
2025-12-31	$27,810,680	344,149	+108.6%	Shares	Sole	2026-02-17
2025-09-30	$13,525,050	165,000	-10.8%	Shares	Sole	2025-11-14
2025-06-30	$14,261,650	185,000	-15.9%	Shares	Sole	2025-08-14
2025-03-31	$17,681,400	220,000	+214.3%	Shares	Sole	2025-05-15
2024-09-30	$5,471,200	70,000	-54.8%	Shares	Sole	2024-11-14
2022-03-31	$9,687,500	155,000	-6.1%	Shares	Sole	2022-05-16
2021-12-31	$11,784,300	165,000	-48.5%	Shares	Sole	2022-02-14
2021-09-30	$17,923,385	320,232	-3.0%	Shares	Sole	2021-11-15
2021-06-30	$16,118,623	330,232	+60.9%	Shares	Sole	2021-08-16
2021-03-31	$9,475,561	205,232	—	Shares	Sole	2021-05-17
No filing history on record for this holder in this stock.