Starboard Value LP: ALGONQUIN POWER & UTILITIES (AQN): Quarterly 13F Position History
As of Q1 2026, Starboard Value LP reported 57,189,420 shares of ALGONQUIN POWER & UTILITIES (AQN), worth $351.1M and representing 7.7% of its 13F equity book. Quarter-over-quarter share count change: 6,300,000 (-9.9%) . The position first appeared in Q2 2023 and has been disclosed across 12 13F-HR filings in Pactolio's tracked window.
- 57,189,420Shares Held (Latest Filing)
- $351.1MReported Market Value (Latest Filing)
- 7.7%Portfolio Weight (% of 13F Equity Book)
- 6,300,000Quarter-over-Quarter Share Change
- -$39.3MQuarter-over-Quarter Value Change
- 66,433,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 12 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 57,189,420 | 6,300,000 | -9.9% | $351.1M | 7.7% | $6.1 |
| Q4 2025 | 63,489,420 | 0 | — | $390.5M | 7.4% | $6.2 |
| Q3 2025 | 63,489,420 | 0 | — | $340.9M | 6.4% | $5.4 |
| Q2 2025 | 63,489,420 | 2,943,580 | -4.4% | $363.8M | 6.3% | $5.7 |
| Q1 2025 | 66,433,000 | +1,117,000 | +1.7% | $341.5M | 6.2% | $5.1 |
| Q4 2024 | 65,316,000 | +3,175,000 | +5.1% | $290.7M | 5.3% | $4.5 |
| Q3 2024 | 62,141,000 | 0 | — | $338.7M | 7.2% | $5.5 |
| Q2 2024 | 62,141,000 | 0 | — | $364.1M | 8.5% | $5.9 |
| Q1 2024 | 62,141,000 | +150,000 | +0.2% | $392.7M | 8.1% | $6.3 |
| Q4 2023 | 61,991,000 | +3,591,000 | +6.1% | $391.8M | 8.2% | $6.3 |
| Q3 2023 | 58,400,000 | +24,261,350 | +71.1% | $345.7M | 8.9% | $5.9 |
| Q2 2023 | 34,138,650 | — | — | $282.0M | 6.1% | $8.3 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Starboard Value LP first disclose a AQN position in 13F-HR filings?
Starboard Value LP first reported ALGONQUIN POWER & UTILITIES (AQN) on its 13F-HR filing for the period ending 2023-06-30 (Q2 2023). The position has appeared on 12 reported quarters within Pactolio's tracked window.
What was Starboard Value LP's most recent quarter-over-quarter share-count change in AQN?
Between Q4 2025 and Q1 2026, Starboard Value LP reduced its AQN position by 6,300,000 shares (-9.9%), leaving 57,189,420 shares at a market value of $351.1M.
Does the implied price-per-share represent Starboard Value LP's cost basis in AQN?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.