Millennium Management’s Ciena CIEN Stock Holding History

Millennium Management’s Portfolio CIEN Stock Details CIEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$11.6M	Sell	23,600 -66,400	-74%	-$33.9M	﹤0.01%	2135
2026 Q1	$34.9M	Buy	90,000 +18,500	+26%	+$5.66M	0.01%	1104
2025 Q4	$16.7M	Sell	71,500 -38,400	-35%	-$7.45M	0.01%	1740
2025 Q3	$16M	Buy	109,900 +18,000	+20%	+$1.83M	0.01%	1918
2025 Q2	$7.47M	Sell	91,900 -5,700	-6%	-$409K	﹤0.01%	2569
2025 Q1	$5.9M	Sell	97,600 -20,400	-17%	-$1.61M	﹤0.01%	2700
2024 Q4	$10M	Buy	+118,000	New	+$8.47M	﹤0.01%	2179
2016 Q1	–	Sell	-40,000	Closed	-$828K	–	3296
2015 Q4	$828K	Buy	+40,000	New	+$919K	﹤0.01%	2393
2015 Q1	–	Sell	-110,900	Closed	-$2.15M	–	3623
2014 Q4	$2.15M	Buy	110,900 +46,200	+71%	+$771K	﹤0.01%	1920
2014 Q3	$1.08M	Buy	64,700 +41,400	+178%	+$811K	﹤0.01%	2248
2014 Q2	$505K	Sell	23,300 -87,500	-79%	-$1.8M	﹤0.01%	2587
2014 Q1	$2.52M	Buy	110,800 +86,500	+356%	+$2.03M	0.01%	1612
2013 Q4	$581K	Sell	24,300 -103,200	-81%	-$2.46M	﹤0.01%	2620
2013 Q3	$3.19M	Buy	+127,500	New	+$2.87M	0.01%	1396

Other funds holding CIEN

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Millennium Management's CIEN Position: Q2 2026 in Review

Millennium Management increased its Ciena (CIEN) stake by 83% in Q2 2026, buying an estimated $38.6M and bringing the position to 166,420 shares worth $81.6M. The position accounts for 0.03% of the portfolio, ranked #614.

Millennium Management first reported a position in CIEN in Q2 2013 and has held it in 49 quarters since. The position peaked at $98.8M in Q4 2025. 1,224 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

Millennium Management held 166,420 shares of Ciena worth $81.6M as of Q2 2026.
Millennium Management bought 75,704 Ciena shares in Q2 2026, an estimated $38.6M.
Ciena made up 0.03% of Millennium Management's portfolio in Q2 2026, its #614 holding.
Millennium Management first reported a position in Ciena in Q2 2013 and has held it in 49 quarters since.
Millennium Management's Ciena position peaked at $98.8M in Q4 2025.
1,224 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.