ThornTree Capital Partners LP: CIENA CORP (CIEN): Quarterly 13F Position History
As of Q2 2026, ThornTree Capital Partners LP reported 130,272 shares of CIENA CORP (CIEN), worth $63.9M and representing 8.7% of its 13F equity book. The position first appeared in Q3 2024 and has been disclosed across 8 13F-HR filings in Pactolio's tracked window.
- 130,272Shares Held (Latest Filing)
- $63.9MReported Market Value (Latest Filing)
- 8.7%Portfolio Weight (% of 13F Equity Book)
- 0Quarter-over-Quarter Share Change
- +$13.3MQuarter-over-Quarter Value Change
- 611,992Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 8 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q2 2026 | 130,272 | 0 | – | $63.9M | 8.7% | $490.6 |
| Q1 2026 | 130,272 | 48,385 | -27.1% | $50.6M | 9.0% | $388.2 |
| Q4 2025 | 178,657 | 160,484 | -47.3% | $41.8M | 7.0% | $233.9 |
| Q3 2025 | 339,141 | 39,821 | -10.5% | $49.4M | 7.6% | $145.7 |
| Q2 2025 | 378,962 | 54,527 | -12.6% | $30.8M | 5.1% | $81.3 |
| Q1 2025 | 433,489 | 178,503 | -29.2% | $26.2M | 5.8% | $60.4 |
| Q4 2024 | 611,992 | +11,683 | +1.9% | $51.9M | 8.7% | $84.8 |
| Q3 2024 | 600,309 | – | – | $37.0M | 7.7% | $61.6 |
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 rather than the manager's cost basis. See the full methodology document for the normalization rules.
When did ThornTree Capital Partners LP first disclose a CIEN position in 13F-HR filings?
ThornTree Capital Partners LP first reported CIENA CORP (CIEN) on its 13F-HR filing for the period ending 2024-09-30 (Q3 2024). The position has appeared on 8 reported quarters within Pactolio's tracked window.
What was ThornTree Capital Partners LP's most recent quarter-over-quarter share-count change in CIEN?
ThornTree Capital Partners LP held the same 130,272 shares of CIEN between Q1 2026 and Q2 2026, so the reported share count was unchanged quarter-over-quarter.
Does the implied price-per-share represent ThornTree Capital Partners LP's cost basis in CIEN?
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.