CIEN
Ciena Corp
Ciena Corp historical holders
total: 2
Lone Pine Capital Ciena Corp transactions over time
- Total transactions:
- 4
- New positions:
- 2
- Sold out:
- 2
- Held since:
- 2026 Q1
- Held for:
- 1 quarter
- Latest activity:
- 2026 Q2
Stephen Mandel has been an institutional investor in Ciena Corp (CIEN) since 2025 Q3. According to 2026 Q2 report, Stephen Mandel doesn't hold any shares. The fund/company first acquired CIEN in 2025 Q3, initially purchasing about 2.01M shares. Stephen Mandel later completely sold out the position and reinvested in CIEN again in 2026 Q1. Since the initial investment, Lone Pine Capital has made 3 more transactions in this position.
When did Stephen Mandel exit their CIEN position?
Stephen Mandel no longer holds Ciena Corp (CIEN). They sold off their entire position in 2026 Q2, closing out an investment that began in 2025 Q3.
When did Stephen Mandel first invest in CIEN?
Stephen Mandel first invested in Ciena Corp (CIEN) in 2025 Q3 at the reported quarter-end price of $145.67 per share, acquiring 2,006,662 shares in their initial purchase.
What is Stephen Mandel's average cost basis for CIEN?
Based on historical transaction data, Stephen Mandel's estimated cost basis for Ciena Corp (CIEN) is approximately $388.23 per share. This represents their average reported price* across all buy transactions.
Has Stephen Mandel reinvested in CIEN after selling?
Yes, Stephen Mandel has shown renewed interest in Ciena Corp (CIEN). After completely selling their position, they reinitiated an investment in 2026 Q1, demonstrating continued conviction in this ticker.
Estimated cost basis*
- Weighted AVG buy price:
- $388.23
- Weighted AVG sell price:
- $388.23
CIEN transactions history by Lone Pine Capital
4 results
| Period |
% of portfolio |
Shares held after* |
Reported price* |
Value* |
% (shares) of activity |
% change to portfolio |
|---|---|---|---|---|---|---|
|
2026 Q2
|
0.00%
|
0
|
$388.23
|
|
-100% (-809,522)
|
-2.51%
|
|
2026 Q1
|
2.51%
|
809,522
|
$388.23
|
$314,280,726
|
new
|
+2.51%
|
|
2025 Q4
|
0.00%
|
0
|
$145.67
|
|
-100% (-2,006,662)
|
-2.13%
|
|
2025 Q3
|
2.13%
|
2,006,662
|
$145.67
|
$292,310,454
|
new
|
+2.13%
|
* Shares, change to shares, sold shares, shares held after: split-adjusted.
* Reported price: this doesn't represent the actual buy or sell price. It is the split-adjusted price of the security as of the last day of the reported period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
If the security is completely sold out, we show the reported split-adjusted price prior to the actual period.
* Estimated cost basis: based on "Reported price*" (not earlier than 2013 Q2). Calculation starts from the latest "new buy" activity to the latest "close out" activity (if any).
* Value or Price: If the security is completely sold out, we show the reported value (or price) prior to the actual period.
* New buy or own: this means there is no earlier reporting (for us or in general). So we can't know if the actual purchase of the security happened at the reported period or earlier.