CIENA CORP (CIEN) — Institutional Holders, Q2 2026

1,229 institutional investment managers reported a CIEN position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $64.5B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← CIEN stock profile

CIEN in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

250

Added to

468

Trimmed

384

Sold out

108

Biggest buyers

AMERICAN CENTURY COMPANIESAdded · +1,315,946 sh+$645.6M
JPMORGAN CHASEAdded · +979,560 sh+$480.5M
NuveenAdded · +547,236 sh+$268.5M
STATE STREETAdded · +371,528 sh+$182.3M
Pictet Asset Management Holding SAAdded · +354,864 sh+$174.1M

Biggest sellers

FMRTrimmed · -2,096,218 sh-$1.0B
Capital Research Global InvestorsTrimmed · -2,093,496 sh-$1.0B
PRICE T ROWE ASSOCIATESTrimmed · -1,171,401 sh-$574.6M
Jericho Capital Asset Management L.P.Trimmed · -1,094,659 sh-$537.0M
LONE PINE CAPITALSold out · -809,522 sh-$397.1M

CIEN 13F holders ranked 1–100 of 1,229

Institutional investors reporting a position in CIENA CORP on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	FMR#1 · 19,113,538 sh	19,113,538	$9.4B	0.41%	-9.9%
2	BlackRock#2 · 12,718,494 sh	12,718,494	$6.2B	0.09%	-4.9%
3	JPMORGAN CHASE#3 · 11,206,209 sh	11,206,209	$5.4B	0.30%	+9.6%
4	VANGUARD CAPITAL MANAGEMENT#4 · 9,233,803 sh	9,233,803	$4.5B	0.10%	+0.7%
5	VANGUARD PORTFOLIO MANAGEMENT#5 · 7,680,665 sh	7,680,665	$3.8B	0.17%	+4.2%
6	STATE STREET#6 · 6,680,578 sh	6,680,578	$3.3B	0.10%	+5.9%
7	PRICE T ROWE ASSOCIATES#7 · 4,071,401 sh	4,071,401	$2.0B	0.20%	-22.3%
8	GEODE CAPITAL MANAGEMENT#8 · 3,370,462 sh	3,370,462	$1.6B	0.09%	-17.1%
9	AMERICAN CENTURY COMPANIES#9 · 1,851,788 sh	1,851,788	$908.4M	0.40%	+245.6%
10	BANK OF AMERICA#10 · 1,788,582 sh	1,788,582	$877.4M	0.06%	-8.5%
11	Capital World Investors#11 · 1,755,602 sh	1,755,602	$861.2M	0.10%	+1.8%
12	Invesco Ltd.#12 · 1,730,210 sh	1,730,210	$848.8M	0.07%	+13.1%
13	NORGES BANK#13 · 1,703,155 sh	1,703,155	$835.5M	0.08%	—
14	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#14 · 1,677,029 sh	1,677,029	$822.7M	0.36%	+20.8%
15	MORGAN STANLEY#15 · 1,634,630 sh	1,634,630	$801.9M	0.04%	+4.7%
16	Nuveen#16 · 1,391,429 sh	1,391,429	$682.6M	0.16%	+64.8%
17	CHARLES SCHWAB INVESTMENT MANAGEMENT#17 · 1,248,995 sh	1,248,995	$612.7M	0.08%	-1.8%
18	NORTHERN#18 · 1,217,939 sh	1,217,939	$597.5M	0.07%	+2.6%
19	DIMENSIONAL FUND ADVISORS#19 · 1,153,229 sh	1,153,229	$565.6M	0.10%	+0.6%
20	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#20 · 1,145,480 sh	1,145,480	$561.9M	0.10%	+34.5%
21	BNP Paribas Asset Management Holding S.A.#21 · 1,105,383 sh	1,105,383	$542.1M	0.54%	+8.2%
22	AQR CAPITAL MANAGEMENT#22 · 1,052,165 sh	1,052,165	$507.2M	0.18%	+7.7%
23	GOLDMAN SACHS GROUP#23 · 946,611 sh	946,611	$464.4M	0.04%	+22.4%
24	Legal & General Group Plc#24 · 887,054 sh	887,054	$435.2M	0.09%	+36.8%
25	Bank of New York Mellon#25 · 825,480 sh	825,480	$404.9M	0.07%	-10.9%
26	VANGUARD FIDUCIARY#26 · 812,345 sh	812,345	$398.5M	0.09%	+2.4%
27	VOYA INVESTMENT MANAGEMENT#27 · 731,614 sh	731,614	$358.9M	0.31%	-39.3%
28	Atreides Management#28 · 688,521 sh	688,521	$337.8M	2.36%	+1.7%
29	Amundi#29 · 675,105 sh	675,105	$331.2M	0.08%	+56.6%
30	Capital Research Global Investors#30 · 656,554 sh	656,554	$322.1M	0.04%	-76.1%
31	MASSACHUSETTS FINANCIAL SERVICES#31 · 641,020 sh	641,020	$314.4M	0.10%	+10.0%
32	DEUTSCHE BANK AG\#32 · 575,041 sh	575,041	$282.1M	0.08%	+8.9%
33	Jericho Capital Asset Management L.P.#33 · 561,513 sh	561,513	$275.5M	2.28%	-66.1%
34	SG Americas Securities#34 · 470,046 sh	470,046	$230.6M	0.13%	+146.2%
35	WELLS FARGO & COMPANY#35 · 422,655 sh	422,655	$207.3M	0.03%	+19.9%
36	Pictet Asset Management Holding SA#36 · 414,698 sh	414,698	$203.3M	0.19%	+593.1%
37	Swiss National Bank#37 · 398,812 sh	398,812	$195.6M	0.10%	-3.5%
38	FIRST ADVISORS#38 · 396,531 sh	396,531	$194.5M	0.11%	-9.2%
39	AMERIPRISE FINANCIAL#39 · 391,326 sh	391,326	$192.0M	0.04%	+109.4%
40	BALYASNY ASSET MANAGEMENT L.P.#40 · 372,449 sh	372,449	$182.7M	0.23%	+15.2%
41	UBS Group AG#41 · 362,297 sh	362,297	$177.7M	0.02%	-44.1%
42	Sumitomo Mitsui#42 · 357,440 sh	357,440	$175.3M	0.10%	+11.1%
43	ACADIAN ASSET MANAGEMENT#43 · 354,846 sh	354,846	$174.0M	0.21%	+7.5%
44	WEALTH ENHANCEMENT ADVISORY SERVICES#44 · 379,977 sh	379,977	$170.1M	—	+31.0%
45	Mitsubishi UFJ Asset Management , Ltd.#45 · 342,995 sh	342,995	$168.3M	0.09%	+8.2%
46	Man Group plc#46 · 334,805 sh	334,805	$164.2M	0.26%	+1331.6%
47	ROYAL BANK OF CANADA#47 · 332,601 sh	332,601	$163.2M	0.02%	+26.2%
48	BNP PARIBAS FINANCIAL MARKETS#48 · 329,488 sh	329,488	$161.6M	0.06%	-22.3%
49	Robeco Institutional Asset Management B.V.#49 · 319,285 sh	319,285	$156.6M	—	+19.2%
50	ROYAL LONDON ASSET MANAGEMENT LTD#50 · 318,654 sh	318,654	$156.3M	0.29%	+136.3%
51	RAYMOND JAMES FINANCIAL#51 · 313,171 sh	313,171	$153.6M	0.04%	+2.8%
52	PRIMECAP MANAGEMENT#52 · 308,050 sh	308,050	$151.1M	0.09%	-29.7%
53	Vanguard Global Advisers#53 · 307,128 sh	307,128	$150.7M	0.07%	-1.1%
54	SCHRODER INVESTMENT MANAGEMENT GROUP#54 · 310,874 sh	310,874	$148.9M	0.11%	-21.1%
55	CITIGROUP#55 · 296,534 sh	296,534	$145.5M	0.05%	+48.2%
56	Neuberger Berman Group#56 · 292,278 sh	292,278	$143.1M	0.10%	+0.9%
57	Qube Research & Technologies Ltd#57 · 282,869 sh	282,869	$138.8M	0.13%	New
58	BARCLAYS PLC#58 · 278,076 sh	278,076	$136.4M	0.03%	+4.7%
59	VANGUARD ASSET MANAGEMENT, Ltd#59 · 275,711 sh	275,711	$135.3M	0.09%	+12.8%
60	National Pension Service#60 · 272,251 sh	272,251	$133.6M	0.09%	-8.8%
61	T. Rowe Price Investment Management#61 · 271,873 sh	271,873	$133.4M	0.09%	-35.0%
62	HSBC PLC#62 · 268,098 sh	268,098	$130.8M	0.05%	+20.1%
63	FRANKLIN RESOURCES#63 · 260,420 sh	260,420	$127.8M	0.03%	+235.2%
64	RHUMBLINE ADVISERS#64 · 258,789 sh	258,789	$127.0M	0.10%	+5.1%
65	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM#65 · 240,709 sh	240,709	$118.1M	0.07%	+1.2%
66	Analog Century Management#66 · 226,198 sh	226,198	$111.0M	4.06%	-8.6%
67	Alyeska Investment Group, L.P.#67 · 220,966 sh	220,966	$108.4M	0.28%	New
68	Allianz Asset Management GmbH#68 · 274,184 sh	274,184	$106.5M	0.10%	-5.3%
69	CITADEL ADVISORS#69 · 214,064 sh	214,064	$105.0M	0.01%	+52.4%
70	Assenagon Asset Management S.A.#70 · 214,002 sh	214,002	$105.0M	—	-41.3%
71	Point72 Asset Management, L.P.#71 · 210,516 sh	210,516	$103.3M	0.11%	-61.3%
72	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC#72 · 200,342 sh	200,342	$98.3M	0.14%	+210.6%
73	Amanah#73 · 200,000 sh	200,000	$98.1M	—	0.0%
74	Williams Jones Wealth Management#74 · 195,762 sh	195,762	$96.0M	1.08%	-8.8%
75	RENAISSANCE TECHNOLOGIES#75 · 184,774 sh	184,774	$90.6M	0.12%	+88.9%
76	TD ASSET MANAGEMENT#76 · 174,717 sh	174,717	$85.7M	0.07%	+2.8%
77	Russell Investments Group, Ltd.#77 · 175,002 sh	175,002	$85.3M	0.07%	-2.0%
78	BIT Capital GmbH#78 · 168,866 sh	168,866	$82.8M	2.45%	New
79	Squarepoint Ops#79 · 167,285 sh	167,285	$82.1M	0.09%	+4368.1%
80	MILLENNIUM MANAGEMENT#80 · 166,420 sh	166,420	$81.6M	0.03%	+83.5%
81	PRINCIPAL FINANCIAL GROUP#81 · 165,322 sh	165,322	$81.1M	0.04%	+5.4%
82	LPL Financial#82 · 164,458 sh	164,458	$80.7M	0.02%	+5.4%
83	Zurcher Kantonalbank (Zurich Cantonalbank)#83 · 158,882 sh	158,882	$77.9M	0.15%	-7.8%
84	PRUDENTIAL FINANCIAL#84 · 158,354 sh	158,354	$77.7M	0.08%	-51.4%
85	ENVESTNET ASSET MANAGEMENT#85 · 153,397 sh	153,397	$75.2M	0.02%	-19.8%
86	NEW YORK STATE COMMON RETIREMENT FUND#86 · 152,786 sh	152,786	$75.0M	0.09%	+81.5%
87	SEI INVESTMENTS#87 · 144,010 sh	144,010	$70.6M	0.06%	-0.5%
88	JUPITER ASSET MANAGEMENT LTD#88 · 141,910 sh	141,910	$69.6M	0.35%	+755.8%
89	BARROW HANLEY MEWHINNEY & STRAUSS#89 · 137,836 sh	137,836	$67.6M	0.20%	-54.3%
90	WILLIAM BLAIR INVESTMENT MANAGEMENT#90 · 133,801 sh	133,801	$65.6M	0.20%	-66.4%
91	D. E. Shaw#91 · 133,195 sh	133,195	$65.3M	0.03%	+1394.6%
92	Senvest Management#92 · 130,426 sh	130,426	$64.0M	1.88%	-24.6%
93	ThornTree Capital Partners#93 · 130,272 sh	130,272	$63.9M	8.74%	0.0%
94	DigitalBridge Group#94 · 129,954 sh	129,954	$63.8M	3.82%	-1.6%
95	CANADA PENSION PLAN INVESTMENT BOARD#95 · 128,320 sh	128,320	$62.9M	0.03%	+39.2%
96	Toroso Investments#96 · 127,546 sh	127,546	$62.6M	0.11%	-10.3%
97	Rokos Capital Management LLP#97 · 127,045 sh	127,045	$62.3M	0.23%	+91.2%
98	BECKER CAPITAL MANAGEMENT#98 · 127,011 sh	127,011	$62.3M	1.68%	-10.3%
99	Foundations Investment Advisors#99 · 126,114 sh	126,114	$61.9M	0.64%	-50.8%
100	ADAGE CAPITAL PARTNERS GP, L.L.C.#100 · 126,000 sh	126,000	$61.8M	0.09%	+8.4%

Funds that sold out of CIEN in Q2 2026 (108)

Held CIEN at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held CIEN in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
LONE PINE CAPITAL809,522 sh	809,522	$314.3M
Polar Capital Plc798,395 sh	798,395	$310.0M
Whale Rock Capital Management231,267 sh	231,267	$89.8M
Zurich Insurance Group Ltd165,181 sh	165,181	$64.1M
E20 Capital Ltd107,349 sh	107,349	$41.7M
Ardmore Road Asset Management91,000 sh	91,000	$35.3M
CloudAlpha Capital Management Limited/Hong Kong88,110 sh	88,110	$34.2M
STEADFAST CAPITAL MANAGEMENT81,670 sh	81,670	$31.7M
Virtus Wealth Solutions63,327 sh	63,327	$24.6M
DIAMOND HILL CAPITAL MANAGEMENT58,545 sh	58,545	$22.7M
Walleye Trading58,514 sh	58,514	$22.7M
Paralel Advisors44,268 sh	44,268	$17.2M
Liontrust Investment Partners LLP70,652 sh	70,652	$16.5M
ION Fund Management Ltd27,665 sh	27,665	$10.7M
Holocene Advisors25,550 sh	25,550	$9.9M
Broad Peak Investment Advisers Pte Ltd24,300 sh	24,300	$9.4M
CHAPIN DAVIS22,959 sh	22,959	$8.9M
VMS Asset Management Limited21,645 sh	21,645	$8.4M
KORNITZER CAPITAL MANAGEMENT17,855 sh	17,855	$6.9M
KP Management15,000 sh	15,000	$5.8M
Genus Capital Management14,000 sh	14,000	$5.4M
Dedeker Financial12,311 sh	12,311	$4.8M
Kultura Capital Management12,300 sh	12,300	$4.8M
Virtu Financial11,555 sh	11,555	$4.5M
Union Bancaire Privee, UBP SA14,605 sh	14,605	$4.3M
GILDER GAGNON HOWE10,558 sh	10,558	$4.1M
AIA Group Ltd10,319 sh	10,319	$4.0M
SANDERS MORRIS HARRIS9,329 sh	9,329	$3.6M
DYMON ASIA CAPITAL (SINGAPORE) PTE. LTD.9,258 sh	9,258	$3.6M
ARMISTICE CAPITAL8,140 sh	8,140	$3.2M
Donoghue Forlines7,515 sh	7,515	$2.9M
WIN ADVISORS7,099 sh	7,099	$2.8M
SYSTEMATIC FINANCIAL MANAGEMENT7,018 sh	7,018	$2.7M
Caitong International Asset Management , Ltd5,665 sh	5,665	$2.2M
Cornerstone Investment Partners5,239 sh	5,239	$2.0M
Jump Financial4,855 sh	4,855	$1.9M
PINKERTON WEALTH6,646 sh	6,646	$1.6M
SONA ASSET MANAGEMENT (US)4,000 sh	4,000	$1.6M
TriaGen Wealth Management3,971 sh	3,971	$1.5M
Dorsey Wright & Associates3,938 sh	3,938	$1.5M
Braeburn Wealth Management3,919 sh	3,919	$1.5M
LANDSCAPE CAPITAL MANAGEMENT, L.L.C.3,514 sh	3,514	$1.4M
Hilltop3,434 sh	3,434	$1.3M
O'Neil Global Advisors3,334 sh	3,334	$1.3M
AXA S.A.3,327 sh	3,327	$1.3M
Regal Partners Ltd3,000 sh	3,000	$1.2M
Dynamic Technology Lab Private Ltd2,970 sh	2,970	$1.2M
MILESTONE ASSET MANAGEMENT2,923 sh	2,923	$1.1M
Qsemble Capital Management2,780 sh	2,780	$1.1M
Select Equity Group, L.P.2,608 sh	2,608	$1.0M
Retireful2,107 sh	2,107	$818.0K
Maridea Wealth Management2,087 sh	2,087	$810.2K
Farringdon Capital, Ltd.1,898 sh	1,898	$736.9K
INCEPTIONR1,779 sh	1,779	$690.7K
EARNED WEALTH ADVISORS1,664 sh	1,664	$646.0K
United Capital Management of KS1,500 sh	1,500	$582.3K
Gallo Partners1,493 sh	1,493	$579.6K
waypoint wealth counsel1,308 sh	1,308	$507.8K
Aureus Asset Management1,276 sh	1,276	$495.4K
TWO SIGMA SECURITIES1,262 sh	1,262	$489.9K
TUDOR INVESTMENT ET AL1,194 sh	1,194	$463.5K
Parallax Volatility Advisers, L.P.1,187 sh	1,187	$460.8K
Aristotle Capital Boston1,317 sh	1,317	$459.4K
Lotus Technology Management1,172 sh	1,172	$455.0K
ARISTEIA CAPITAL, L.L.C.1,155 sh	1,155	$448.4K
Allegiance Financial Group Advisory Services1,148 sh	1,148	$445.7K
Absolute Gestao de Investimentos Ltda.820 sh	820	$318.3K
GenTrust811 sh	811	$314.9K
Ironwood Investment Counsel788 sh	788	$305.9K
Advisory Alpha776 sh	776	$301.3K
TBH Global Asset Management658 sh	658	$294.1K
KNIGHTSBRIDGE ASSET MANAGEMENT742 sh	742	$288.1K
CFC Planning735 sh	735	$285.3K
HBK Sorce Advisory499 sh	499	$273.5K
Quadrant Private Wealth Management686 sh	686	$266.3K
EVOKE WEALTH685 sh	685	$265.9K
C2P Capital Advisory Group, d.b.a. Prosperity Capital Ad671 sh	671	$260.5K
Neo Ivy Capital Management668 sh	668	$259.3K
ROWLANDMILLER & PARTNERS.ADV645 sh	645	$250.4K
Gordian Capital Singapore Pte Ltd600 sh	600	$232.9K
ZACKS INVESTMENT MANAGEMENT554 sh	554	$215.3K
JAG CAPITAL MANAGEMENT544 sh	544	$211.2K
Bank Julius Baer & Ltd, Zurich396 sh	396	$153.7K
THURSTON, SPRINGER, MILLER, HERD & TITAK284 sh	284	$110.3K
Wall Street Financial Group221 sh	221	$85.8K
Destiny Wealth Partners210 sh	210	$81.5K
TWIN PEAKS WEALTH ADVISORS208 sh	208	$80.8K
Golden State Equity Partners167 sh	167	$64.8K
SBI Okasan Asset Management Ltd.164 sh	164	$59.9K
SOA Wealth Advisors150 sh	150	$58.2K
Western Wealth Management125 sh	125	$48.5K
Hartree Partners100 sh	100	$38.8K
Annis Gardner Whiting Capital Advisors92 sh	92	$35.7K
Intentional Wealth Strategies74 sh	74	$28.7K
Strategic Advocates59 sh	59	$22.9K
Aster Capital Management (DIFC) Ltd357 sh	357	$21.6K
YANKCOM Partnership25 sh	25	$9.7K
Scarborough Advisors20 sh	20	$7.8K
Legacy Wealth Managment17 sh	17	$6.6K
Vermillion Wealth Management10 sh	10	$3.9K

And 8 smaller positions.

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.