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Ticker · held by 3 filers

OTTR

OTTER TAIL CORP

All tracked filers currently holding OTTR, ranked by position size. Each row links through to the filer's full portfolio.

Total value held
$579.3M
Total shares
6,624,083
Filers holding
3
Caveat
long only · 13F-eligible managers only
Filers holding OTTR
# Filer Class Shares Value (USD) % of port
1 BlackRock · Larry Fink COM 6,495,576 $568.9M 0.01%
2 Citadel Advisors · Ken Griffin COM 115,209 $9.3M 0.00%
3 Renaissance Technologies · Jim Simons (founder) COM 13,298 $1.1M 0.00%

What this is

This page reverses the usual 13F view: instead of "what does Buffett hold," it answers "who holds NVDA?" Across the dozen tracked filers, all current 13F-disclosed holders of OTTR are listed, with the position size and what fraction of each filer's overall portfolio it represents.

Caveats: only the filers tracked here are included (~12 names) — not the whole 13F universe (~6,000 filers). Position values are at the most recent quarter-end, not current market price. Only long positions are visible; shorts and synthetics aren't.

v0.2 · 2026 · data via SEC EDGAR · CUSIP→ticker via OpenFIGI