Spruce Street Capital LP: LB PHARMACEUTICALS INC (LBRX): Quarterly 13F Position History
As of Q1 2026, Spruce Street Capital LP reported 1,376,159 shares of LB PHARMACEUTICALS INC (LBRX), worth $33.6M and representing 8.1% of its 13F equity book. Quarter-over-quarter share count change: + 370,566 (+36.9%) . The position first appeared in Q4 2025 and has been disclosed across 2 13F-HR filings in Pactolio's tracked window.
- 1,376,159Shares Held (Latest Filing)
- $33.6MReported Market Value (Latest Filing)
- 8.1%Portfolio Weight (% of 13F Equity Book)
- +370,566Quarter-over-Quarter Share Change
- +$11.3MQuarter-over-Quarter Value Change
- 1,376,159Peak Reported Shares (Historical)
Recent initiation: Spruce Street Capital LP first reported LBRX 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 | 1,376,159 | +370,566 | +36.9% | $33.6M | 8.1% | $24.4 |
| Q4 2025 | 1,005,593 | — | — | $22.4M | 7.4% | $22.3 |
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 Spruce Street Capital LP first disclose a LBRX position in 13F-HR filings?
Spruce Street Capital LP first reported LB PHARMACEUTICALS INC (LBRX) 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 LBRX?
Between Q4 2025 and Q1 2026, Spruce Street Capital LP added 370,566 shares of LBRX (+36.9%), bringing the total reported position to 1,376,159 shares at a market value of $33.6M.
Does the implied price-per-share represent Spruce Street Capital LP's cost basis in LBRX?
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.