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Of the 13 tracked institutions holding OTTR, 7 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +3.6pt. It's a gauge of who owns the name, not just how many.
Among the 13 tracked institutional investors we monitor, OTTR (OTTER TAIL CORP) is held with a combined value of $1.22B across 14,075,100 shares. The largest holder is BlackRock, Inc. with a position worth $590.05M. 7 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$1.22B
Total Shares Held
14,075,100
Institutional Holders
13
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $590.05M | 0.01% | +2.1% |
| 2 | VANGUARD GROUP INC | $408.86M | 0.01% | -0.7% |
| 3 | STATE STREET CORP | $148.09M | 0.00% | +4.9% |
| 4 | PRICE T ROWE ASSOCIATES INC /MD/ | $23.40M | 0.00% | +96.3% |
| 5 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $18.94M | 0.03% | -38.4% |
| 6 | TWO SIGMA ADVISERS, LP | $13.02M | 0.03% | +334.2% |
| 7 | MILLENNIUM MANAGEMENT LLC | $6.40M | 0.00% | -45.4% |
| 8 | CITADEL ADVISORS LLC | $3.24M | 0.00% | -29.6% |
| 9 | AQR CAPITAL MANAGEMENT LLC | $2.63M | 0.00% | +32.4% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $2.10M | 0.00% | +252.6% |
SEC Schedule 13D (activist) and 13G (passive) filings for OTTR. Filed when an investor acquires 5%+ ownership.
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of OTTR with a position worth $590.05M, representing 0.01% of their portfolio. In total, 13 institutional investors hold OTTR with a combined value of $1.22B.
Institutional investors hold $1.22B worth of OTTR stock across 13 positions. The largest institutional holder is BlackRock, Inc. with $590.05M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For OTTR, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their OTTR positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$89.78
2026-10-21
YTD
+10.2%
74% of 52-week range
