Question 1

Which hedge funds and institutional investors hold CIEN?

Accepted Answer

StonkWhisper tracks 13F filings submitted to the SEC by institutional investment managers with over $100 million in assets. The whale tracker for CIEN shows which major funds hold positions, their portfolio weight, share counts, and how those positions changed quarter over quarter.

Question 2

What does conviction level mean for CIEN whale holdings?

Accepted Answer

Conviction level reflects how significant CIEN is within a fund's overall portfolio. A high-conviction position means the manager has allocated a large percentage of their portfolio to CIEN, suggesting strong directional confidence in the stock.

Question 3

How current is the whale data for CIEN?

Accepted Answer

Institutional 13F filings are required within 45 days of each calendar quarter end (March 31, June 30, September 30, December 31). StonkWhisper processes filings as they are published on SEC EDGAR, so data reflects the most recently reported quarter.

Question 4

What do quarter-over-quarter changes tell me about CIEN?

Accepted Answer

QoQ changes for CIEN show whether institutional managers are increasing, decreasing, initiating, or exiting their positions. New positions and significant increases can signal growing institutional conviction, while exits or decreases may indicate waning confidence.

Manager	Shares	Value	% of Portfolio	Manager AUM
State Street	6.3M	$2.4B	0.1%	$2896.4B
Capital Research	2.8M	$1.1B	0.2%	$644.6B
Capital World	1.7M	$669.6M	0.1%	$732.9B
Arrowstreet	1.4M	$539.0M	0.3%	$184.8B
Lone Pine	809.5K	$314.3M	2.5%	$12.5B
Point72	544.7K	$211.5M	0.3%	$78.1B
American Century	535.8K	$208.0M	0.1%	$194.3B
Geode Capital	459.5K	$178.4M	0.0%	$1607.5B
PRIMECAP	438.1K	$170.1M	0.1%	$127.0B
Citadel	435.8K	$169.2M	0.0%	$618.5B
William Blair	398.6K	$154.7M	0.5%	$30.3B
Balyasny	323.4K	$125.6M	0.2%	$77.1B
Citadel	259.2K	$100.6M	0.0%	$618.5B
Whale Rock	231.3K	$89.8M	1.2%	$7.7B
Fidelity (FMR)	156.6K	$60.8M	0.0%	$1898.4B
Bridgewater	143.8K	$55.8M	0.2%	$22.4B
Gotham Asset	121.3K	$47.1M	0.1%	$32.7B
Adage Capital	116.2K	$45.1M	0.1%	$64.8B
Point72	109.0K	$42.3M	0.1%	$78.1B
Renaissance Tech	97.8K	$38.0M	0.1%	$63.9B
Millennium	90.7K	$35.2M	0.0%	$240.3B
DFA	90.6K	$35.2M	0.0%	$481.4B
Millennium	90.0K	$34.9M	0.0%	$240.3B
Point72	83.2K	$32.3M	0.0%	$78.1B
Steadfast	81.7K	$31.7M	1.1%	$2.9B
Millennium	55.4K	$21.5M	0.0%	$240.3B
Citadel	44.2K	$17.1M	0.0%	$618.5B
Tudor	28.5K	$11.1M	0.0%	$53.9B
Marshall Wace	27.6K	$10.7M	0.0%	$100.4B
Tudor	27.3K	$10.6M	0.0%	$53.9B
Neuberger Berman (Eisman)	12.2K	$4.7M	0.0%	$131.4B
DE Shaw	12.1K	$4.7M	0.0%	$166.3B
GGH	10.6K	$4.1M	0.0%	$8.3B
Wellington	8.9K	$3.4M	0.0%	$535.5B
DE Shaw	4.5K	$1.7M	0.0%	$166.3B
Two Sigma	3.5K	$1.4M	0.0%	$123.9B
Select Equity	2.6K	$1.0M	0.0%	$19.5B
First Eagle	2.6K	$1.0M	0.0%	$59.0B
Brevan Howard	2.4K	$946K	0.0%	$11.3B
Two Sigma	1.9K	$738K	0.0%	$123.9B
Tudor	1.2K	$464K	0.0%	$53.9B
Aristeia	1.2K	$448K	0.0%	$4.8B
Franklin Templeton	1.1K	$429K	0.0%	$408.3B
Two Sigma	1.0K	$388K	0.0%	$123.9B
Fisher Investments	610	$237K	0.0%	$294.9B
Man Group	344	$134K	0.0%	$55.1B
Acadian	330.1K	$128K	0.2%	$70.5M
BlackRock	318	$123K	—	$5723.5B
Northern Trust	125	$49K	—	$756.6B
AQR Capital	9	$3K	—	$218.4B
Kayne Anderson	3	$1K	—	$34.0B

CIEN

Who Holds CIEN

Changes This Quarter