Spruce Street Capital LP: ALTO NEUROSCIENCE INC (ANRO): Quarterly 13F Position History
As of Q1 2026, Spruce Street Capital LP reported 1,325,210 shares of ALTO NEUROSCIENCE INC (ANRO), worth $29.1M and representing 7.0% of its 13F equity book. Quarter-over-quarter share count change: + 1,102,366 (+494.7%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 1,325,210Shares Held (Latest Filing)
- $29.1MReported Market Value (Latest Filing)
- 7.0%Portfolio Weight (% of 13F Equity Book)
- +1,102,366Quarter-over-Quarter Share Change
- +$25.1MQuarter-over-Quarter Value Change
- 1,325,210Peak Reported Shares (Historical)
Recent initiation: Spruce Street Capital LP first reported ANRO on the Q4 2025 filing — fewer than three quarters of history are available.
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 2 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,325,210 | +1,102,366 | +494.7% | $29.1M | 7.0% | $22.0 |
| Q4 2025 | 222,844 | — | — | $4.0M | 1.3% | $17.8 |
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 Spruce Street Capital LP first disclose a ANRO position in 13F-HR filings?
Spruce Street Capital LP first reported ALTO NEUROSCIENCE INC (ANRO) on its 13F-HR filing for the period ending 2025-12-31 (Q4 2025). The position has appeared on 2 reported quarters within Pactolio's tracked window.
What was Spruce Street Capital LP's most recent quarter-over-quarter share-count change in ANRO?
Between Q4 2025 and Q1 2026, Spruce Street Capital LP added 1,102,366 shares of ANRO (+494.7%), bringing the total reported position to 1,325,210 shares at a market value of $29.1M.
Does the implied price-per-share represent Spruce Street Capital LP's cost basis in ANRO?
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.