On this page, we present all of the funds holding ZI from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding ZI, with a link to that fund's top holdings. The next columns indicate the amount of ZI stock held by each of the funds holding ZI, followed by the ZI position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 336 funds holding ZI within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by Carlyle Group Inc.. For more details on the positions held by Carlyle Group Inc. (or by any of the other funds holding ZI), click the fund name in the "Holder" column of the funds-holding-ZI table below.

Holder	Amount	Position Size ($ in 1000's)	As of
Carlyle Group Inc.	35,244,474	$651,670	12/31/2023
ZI	35,244,474	$651,670	12/31/2023
Vanguard Group Inc.	33,287,433	$615,485	12/31/2023
ZI	33,287,433	$615,485	12/31/2023
BlackRock Inc.	27,182,630	$502,607	12/31/2023
ZI	27,182,630	$502,607	12/31/2023
Wellington Management Group LLP	25,097,536	$464,053	12/31/2023
ZI	25,097,536	$464,053	12/31/2023
Dragoneer Investment Group LLC	22,120,065	$409,000	12/31/2023
ZI	22,120,065	$409,000	12/31/2023
FMR LLC	15,778,319	$291,741	12/31/2023
ZI	15,778,319	$291,741	12/31/2023
Morgan Stanley	14,663,290	$271,124	12/31/2023
ZI	14,663,290	$271,124	12/31/2023
HMI Capital LLC	13,481,070	$249,265	12/31/2023
ZI	13,481,070	$249,265	12/31/2023
Ameriprise Financial Inc.	11,453,235	$211,770	12/31/2023
ZI	11,453,235	$211,770	12/31/2023
Voya Investment Management LLC	10,425,619	$192,770	12/31/2023
ZI	10,425,619	$192,770	12/31/2023
State Street Corp	8,574,724	$158,547	12/31/2023
ZI	8,574,724	$158,547	12/31/2023
Tiger Global Management LLC	7,150,728	$132,217	12/31/2023
ZI	7,150,728	$132,217	12/31/2023
Coatue Management LLC	6,523,489	$120,619	12/31/2023
ZI	6,523,489	$120,619	12/31/2023
Franklin Resources Inc.	6,055,152	$111,960	12/31/2023
ZI	6,055,152	$111,960	12/31/2023
Geode Capital Management LLC	4,960,204	$91,760	12/31/2023
ZI	4,960,204	$91,760	12/31/2023
Sachem Head Capital Management LP	4,060,000	$75,069	12/31/2023
ZI	4,060,000	$75,069	12/31/2023
JPMorgan Chase & Co.		$70,971	12/31/2023
ZI	3,798,640	$70,237	12/31/2023
Call	39,700	$734	12/31/2023
First Trust Advisors LP	3,517,996	$65,048	12/31/2023
ZI	3,517,996	$65,048	12/31/2023
Voloridge Investment Management LLC	3,283,806	$60,718	12/31/2023
ZI	3,283,806	$60,718	12/31/2023
Two Sigma Investments LP	3,088,647	$57,109	12/31/2023
ZI	3,088,647	$57,109	12/31/2023
Bank of New York Mellon Corp	3,080,951	$56,967	12/31/2023
ZI	3,080,951	$56,967	12/31/2023
Norges Bank	2,998,825	$55,448	12/31/2023
ZI	2,998,825	$55,448	12/31/2023
Point72 Asset Management L.P.	2,607,400	$48,211	12/31/2023
ZI	2,607,400	$48,211	12/31/2023
Northern Trust Corp	2,360,488	$43,645	12/31/2023
ZI	2,360,488	$43,645	12/31/2023
Price T Rowe Associates Inc. MD	2,311,034	$42,732	12/31/2023
ZI	2,311,034	$42,732	12/31/2023
Dimensional Fund Advisors LP	2,267,298	$41,926	12/31/2023
ZI	2,267,298	$41,926	12/31/2023
Amundi	2,186,946	$40,437	12/31/2023
ZI	2,186,946	$40,437	12/31/2023
Nuveen Asset Management LLC	2,144,002	$39,643	12/31/2023
ZI	2,144,002	$39,643	12/31/2023
Charles Schwab Investment Management Inc.	2,062,141	$38,129	12/31/2023
ZI	2,062,141	$38,129	12/31/2023
Two Sigma Advisers LP	1,891,600	$34,976	12/31/2023
ZI	1,891,600	$34,976	12/31/2023
Millennium Management LLC	1,792,742	$33,148	12/31/2023
ZI	1,792,742	$33,148	12/31/2023
Balyasny Asset Management LLC		$30,417	12/31/2023
ZI	1,195,066	$22,097	12/31/2023
Call	450,000	$8,320	12/31/2023
Greenhouse Funds LLLP	1,601,989	$29,621	12/31/2023
ZI	1,601,989	$29,621	12/31/2023
Assenagon Asset Management S.A.	1,696,019	$27,187	03/31/2024
ZI	1,696,019	$27,187	03/31/2024
Riverbridge Partners LLC	1,411,014	$26,090	12/31/2023
ZI	1,411,014	$26,090	12/31/2023
Kinetic Partners Management LP	1,390,000	$25,701	12/31/2023
ZI	1,390,000	$25,701	12/31/2023
Citadel Advisors LLC		$24,682	12/31/2023
ZI	824,084	$15,237	12/31/2023
Call	808,000	$14,940	12/31/2023
Put	297,200	$5,495	12/31/2023
Susquehanna International Group LLP		$24,346	12/31/2023
Call	1,061,500	$19,627	12/31/2023
ZI	647,446	$11,971	12/31/2023
Put	392,200	$7,252	12/31/2023
Frontier Capital Management Co. LLC	1,314,649	$24,308	12/31/2023
ZI	1,314,649	$24,308	12/31/2023
LA Financiere DE L Echiquier	1,180,602	$21,829	12/31/2023
ZI	1,180,602	$21,829	12/31/2023
Goldman Sachs Group Inc.	1,156,530	$21,384	12/31/2023
ZI	1,156,530	$21,384	12/31/2023
HighTower Advisors LLC	1,149,853	$21,237	12/31/2023
ZI	1,149,853	$21,237	12/31/2023
Renaissance Technologies LLC	1,142,416	$21,123	12/31/2023
ZI	1,142,416	$21,123	12/31/2023
Principal Street Partners LLC	1,115,486	$20,625	12/31/2023
ZI	1,115,486	$20,625	12/31/2023
Principal Financial Group Inc.	1,094,512	$20,238	12/31/2023
ZI	1,094,512	$20,238	12/31/2023
Legal & General Group Plc	1,013,572	$18,741	12/31/2023
ZI	1,013,572	$18,741	12/31/2023
Federated Hermes Inc.	1,004,508	$18,573	12/31/2023
ZI	1,004,508	$18,573	12/31/2023
AlpInvest Partners B.V.	979,618	$18,113	12/31/2023
ZI	979,618	$18,113	12/31/2023
Jane Street Group LLC		$17,806	12/31/2023
ZI	838,001	$15,495	12/31/2023
Call	202,700	$3,748	12/31/2023
Put	77,700	$1,437	12/31/2023
Duquesne Family Office LLC	924,100	$17,087	12/31/2023
ZI	924,100	$17,087	12/31/2023
Rhumbline Advisers	898,466	$16,613	12/31/2023
ZI	898,466	$16,613	12/31/2023
Marshall Wace LLP	785,927	$14,532	12/31/2023
ZI	785,927	$14,532	12/31/2023
Barclays PLC	753,260	$13,928	12/31/2023
ZI	753,260	$13,928	12/31/2023
Group One Trading L.P.		$13,065	12/31/2023
Call	820,600	$15,173	12/31/2023
Put	114,000	$2,108	12/31/2023
UBS Asset Management Americas Inc.	692,428	$12,803	12/31/2023
ZI	692,428	$12,803	12/31/2023
Delta Global Management LP	682,397	$12,618	12/31/2023
ZI	682,397	$12,618	12/31/2023
Lazard Asset Management LLC	675,702	$12,493	12/31/2023
ZI	675,702	$12,493	12/31/2023
Readystate Asset Management LP		$12,328	12/31/2023
ZI	604,668	$11,180	12/31/2023
Call	62,100	$1,148	12/31/2023
Man Group plc	647,922	$11,980	12/31/2023
ZI	647,922	$11,980	12/31/2023
CIBC Private Wealth Group LLC	575,791	$10,646	12/31/2023
ZI	575,791	$10,646	12/31/2023
Swiss National Bank	554,400	$10,251	12/31/2023
ZI	554,400	$10,251	12/31/2023
Makena Capital Management LLC	532,873	$9,853	12/31/2023
ZI	532,873	$9,853	12/31/2023
Neuberger Berman Group LLC	492,388	$9,104	12/31/2023
ZI	492,388	$9,104	12/31/2023
Invesco Ltd.	476,771	$8,815	12/31/2023
ZI	476,771	$8,815	12/31/2023
IvyRock Asset Management HK Ltd	468,697	$8,666	12/31/2023
ZI	468,697	$8,666	12/31/2023
Primecap Management Co. CA	451,619	$8,350	12/31/2023
ZI	451,619	$8,350	12/31/2023
Great West Life Assurance Co. Can	449,175	$8,303	12/31/2023
ZI	449,175	$8,303	12/31/2023
Advantage Alpha Capital Partners LP	431,685	$7,982	12/31/2023
ZI	431,685	$7,982	12/31/2023
California Public Employees Retirement System	429,452	$7,941	12/31/2023
ZI	429,452	$7,941	12/31/2023
Bank of America Corp DE	424,575	$7,850	12/31/2023
ZI	424,575	$7,850	12/31/2023
Royal Bank of Canada	422,119	$7,806	12/31/2023
ZI	422,119	$7,806	12/31/2023
Alliancebernstein L.P.	418,087	$7,730	12/31/2023
ZI	418,087	$7,730	12/31/2023
American International Group Inc.	401,536	$7,424	12/31/2023
ZI	401,536	$7,424	12/31/2023
Telemark Asset Management LLC	400,000	$7,396	12/31/2023
ZI	400,000	$7,396	12/31/2023
Jacobs Levy Equity Management Inc.	395,788	$7,318	12/31/2023
ZI	395,788	$7,318	12/31/2023
Prospect Capital Advisors LLC	390,000	$7,211	12/31/2023
ZI	390,000	$7,211	12/31/2023
Capital Fund Management S.A.		$6,996	12/31/2023
Call	748,700	$13,843	12/31/2023
Put	370,300	$6,847	12/31/2023
Retirement Systems of Alabama	371,019	$6,860	12/31/2023
ZI	371,019	$6,860	12/31/2023
Stanley Laman Group Ltd.	405,999	$6,508	03/31/2024
ZI	405,999	$6,508	03/31/2024
Credit Suisse AG	351,498	$6,499	12/31/2023
ZI	351,498	$6,499	12/31/2023
Holocene Advisors LP	345,738	$6,393	12/31/2023
ZI	345,738	$6,393	12/31/2023
Teachers Retirement System of The State of Kentucky	321,761	$5,949	12/31/2023
ZI	321,761	$5,949	12/31/2023
California State Teachers Retirement System	300,289	$5,552	12/31/2023
ZI	300,289	$5,552	12/31/2023
Envestnet Asset Management Inc.	294,909	$5,453	12/31/2023
ZI	294,909	$5,453	12/31/2023
Twin Tree Management LP	276,878	$5,119	12/31/2023
ZI	276,878	$5,119	12/31/2023
HRT Financial LP	267,768	$4,951	12/31/2023
ZI	267,768	$4,951	12/31/2023
GTS Securities LLC		$4,923	12/31/2023
ZI	224,118	$4,144	12/31/2023
Call	78,400	$1,450	12/31/2023
Put	36,300	$671	12/31/2023
The Manufacturers Life Insurance Company	263,631	$4,875	12/31/2023
ZI	263,631	$4,875	12/31/2023
Sixth Street Partners Management Company L.P.	260,000	$4,807	12/31/2023
ZI	260,000	$4,807	12/31/2023
Texas Permanent School Fund	255,871	$4,731	12/31/2023
ZI	255,871	$4,731	12/31/2023
New York State Teachers Retirement System	248,164	$4,589	12/31/2023
ZI	248,164	$4,589	12/31/2023
State Board of Administration of Florida Retirement System	242,789	$4,489	12/31/2023
ZI	242,789	$4,489	12/31/2023
Janus Henderson Group PLC	241,029	$4,457	12/31/2023
ZI	241,029	$4,457	12/31/2023
Utah Retirement Systems	240,453	$4,446	12/31/2023
ZI	240,453	$4,446	12/31/2023
Mackenzie Financial Corp	236,948	$4,381	12/31/2023
ZI	236,948	$4,381	12/31/2023
Allianz Asset Management GmbH	235,679	$4,358	12/31/2023
ZI	235,679	$4,358	12/31/2023
Washington Harbour Partners LP	215,400	$3,983	12/31/2023
ZI	215,400	$3,983	12/31/2023
Aquila Investment Management LLC	243,000	$3,895	03/31/2024
ZI	243,000	$3,895	03/31/2024
Stifel Financial Corp	207,637	$3,839	12/31/2023
ZI	207,637	$3,839	12/31/2023
New York State Common Retirement Fund	205,800	$3,805	12/31/2023
ZI	205,800	$3,805	12/31/2023
Walleye Capital LLC		$3,701	12/31/2023
ZI	204,269	$3,777	12/31/2023
Put	61,000	$1,128	12/31/2023
Call	56,900	$1,052	12/31/2023
Ilmarinen Mutual Pension Insurance Co	200,000	$3,698	12/31/2023
ZI	200,000	$3,698	12/31/2023
Cynosure Management LLC	197,759	$3,657	12/31/2023
ZI	197,759	$3,657	12/31/2023
Adage Capital Partners GP L.L.C.	190,000	$3,513	12/31/2023
ZI	190,000	$3,513	12/31/2023
Squarepoint Ops LLC		$3,433	12/31/2023
Call	565,900	$10,463	12/31/2023
Put	380,200	$7,030	12/31/2023
Mutual of America Capital Management LLC	182,649	$3,377	12/31/2023
ZI	182,649	$3,377	12/31/2023
Hsbc Holdings PLC	175,350	$3,249	12/31/2023
ZI	175,350	$3,249	12/31/2023
MetLife Investment Management LLC	173,533	$3,209	12/31/2023
ZI	173,533	$3,209	12/31/2023
State of New Jersey Common Pension Fund D	170,019	$3,144	12/31/2023
ZI	170,019	$3,144	12/31/2023
Kodai Capital Management LP	166,158	$3,072	12/31/2023
ZI	166,158	$3,072	12/31/2023
Octahedron Capital Management L.P.		$2,958	12/31/2023
Call	160,000	$2,958	12/31/2023
Wolverine Trading LLC		$2,737	12/31/2023
Call	157,200	$2,907	12/31/2023
Put	20,700	$383	12/31/2023
ZI	11,533	$213	12/31/2023
Sei Investments Co.	147,513	$2,728	12/31/2023
ZI	147,513	$2,728	12/31/2023
Achmea Investment Management B.V.	147,380	$2,725	12/31/2023
ZI	147,380	$2,725	12/31/2023
Amalgamated Bank	166,676	$2,672	03/31/2024
ZI	166,676	$2,672	03/31/2024
Royal London Asset Management Ltd.	141,452	$2,615	12/31/2023
ZI	141,452	$2,615	12/31/2023
Bayesian Capital Management LP	140,600	$2,600	12/31/2023
ZI	140,600	$2,600	12/31/2023
Oberndorf William E	140,485	$2,598	12/31/2023
ZI	140,485	$2,598	12/31/2023
CAPROCK Group Inc.	139,503	$2,579	12/31/2023
ZI	139,503	$2,579	12/31/2023
Yousif Capital Management LLC	137,754	$2,547	12/31/2023
ZI	137,754	$2,547	12/31/2023
Comerica Bank	137,283	$2,538	12/31/2023
ZI	137,283	$2,538	12/31/2023
Treasurer of the State of North Carolina	133,464	$2,468	12/31/2023
ZI	133,464	$2,468	12/31/2023
Amica Mutual Insurance Co.	131,037	$2,423	12/31/2023
ZI	131,037	$2,423	12/31/2023
RBF Capital LLC	130,000	$2,404	12/31/2023
ZI	130,000	$2,404	12/31/2023
Bailard Inc.	129,595	$2,396	12/31/2023
ZI	129,595	$2,396	12/31/2023
Stephens Investment Management Group LLC	128,416	$2,374	12/31/2023
ZI	128,416	$2,374	12/31/2023
Public Employees Retirement System of Ohio	126,816	$2,345	12/31/2023
ZI	126,816	$2,345	12/31/2023
UBS Group AG		$2,326	12/31/2023
Call	117,300	$2,169	12/31/2023
ZI	8,471	$157	12/31/2023
G2 Investment Partners Management LLC	118,350	$2,188	12/31/2023
ZI	118,350	$2,188	12/31/2023
Victory Capital Management Inc.	116,874	$2,161	12/31/2023
ZI	116,874	$2,161	12/31/2023
Cerity Partners LLC	114,930	$2,125	12/31/2023
ZI	114,930	$2,125	12/31/2023
Seven Eight Capital LP	112,904	$2,088	12/31/2023
ZI	112,904	$2,088	12/31/2023
Cubist Systematic Strategies LLC		$2,016	12/31/2023
Call	63,400	$1,172	12/31/2023
ZI	45,640	$844	12/31/2023
Vontobel Holding Ltd.	107,043	$1,979	12/31/2023
ZI	107,043	$1,979	12/31/2023
Parkwood LLC	101,370	$1,874	12/31/2023
ZI	101,370	$1,874	12/31/2023
Standard Life Aberdeen plc	100,875	$1,865	12/31/2023
ZI	100,875	$1,865	12/31/2023
Oppenheimer Asset Management Inc.	99,796	$1,845	12/31/2023
ZI	99,796	$1,845	12/31/2023
Wells Fargo & Company MN	98,810	$1,827	12/31/2023
ZI	98,810	$1,827	12/31/2023
Walleye Trading LLC		$1,807	12/31/2023
Call	57,100	$1,056	12/31/2023
ZI	41,694	$771	12/31/2023
Put	1,100	$20	12/31/2023
Ensign Peak Advisors Inc	97,640	$1,805	12/31/2023
ZI	97,640	$1,805	12/31/2023
Canada Pension Plan Investment Board	95,700	$1,769	12/31/2023
ZI	95,700	$1,769	12/31/2023
State of Tennessee Treasury Department	95,000	$1,757	12/31/2023
ZI	95,000	$1,757	12/31/2023
Numerai GP LLC	91,513	$1,692	12/31/2023
ZI	91,513	$1,692	12/31/2023
PEAK6 Investments LLC		$1,655	12/31/2023
Call	236,400	$4,371	12/31/2023
Put	178,200	$3,295	12/31/2023
ZI	31,312	$579	12/31/2023
Citigroup Inc.		$1,622	12/31/2023
ZI	84,773	$1,567	12/31/2023
Call	3,000	$55	12/31/2023
Oregon Public Employees Retirement Fund	83,400	$1,542	12/31/2023
ZI	83,400	$1,542	12/31/2023
AXA S.A.	81,285	$1,503	12/31/2023
ZI	81,285	$1,503	12/31/2023
SG Americas Securities LLC	80,873	$1,495	12/31/2023
ZI	80,873	$1,495	12/31/2023
Arizona State Retirement System	78,560	$1,453	12/31/2023
ZI	78,560	$1,453	12/31/2023
Rafferty Asset Management LLC	75,514	$1,396	12/31/2023
ZI	75,514	$1,396	12/31/2023
Quantinno Capital Management LP	75,402	$1,394	12/31/2023
ZI	75,402	$1,394	12/31/2023
Thrivent Financial for Lutherans	74,523	$1,378	12/31/2023
ZI	74,523	$1,378	12/31/2023
Louisiana State Employees Retirement System	85,300	$1,367	03/31/2024
ZI	85,300	$1,367	03/31/2024
LPL Financial LLC	70,043	$1,295	12/31/2023
ZI	70,043	$1,295	12/31/2023
Northwestern Mutual Investment Management Company LLC	65,903	$1,219	12/31/2023
ZI	65,903	$1,219	12/31/2023
Ameritas Investment Partners Inc.	65,408	$1,209	12/31/2023
ZI	65,408	$1,209	12/31/2023
Commonwealth of Pennsylvania Public School Empls Retrmt SYS	65,367	$1,209	12/31/2023
ZI	65,367	$1,209	12/31/2023
KBC Group NV	63,767	$1,179	12/31/2023
ZI	63,767	$1,179	12/31/2023
State of Michigan Retirement System	72,700	$1,165	03/31/2024
ZI	72,700	$1,165	03/31/2024
State of Wisconsin Investment Board	62,558	$1,157	12/31/2023
ZI	62,558	$1,157	12/31/2023
Deutsche Bank AG	61,518	$1,137	12/31/2023
ZI	61,518	$1,137	12/31/2023
Zurcher Kantonalbank Zurich Cantonalbank	60,071	$1,111	12/31/2023
ZI	60,071	$1,111	12/31/2023
Pacer Advisors Inc.	56,974	$1,053	12/31/2023
ZI	56,974	$1,053	12/31/2023
Profund Advisors LLC	56,461	$1,044	12/31/2023
ZI	56,461	$1,044	12/31/2023
New Mexico Educational Retirement Board	62,400	$1,000	03/31/2024
ZI	62,400	$1,000	03/31/2024
Xponance Inc.	51,220	$947	12/31/2023
ZI	51,220	$947	12/31/2023
Handelsbanken Fonder AB	50,300	$930	12/31/2023
ZI	50,300	$930	12/31/2023
Guggenheim Capital LLC	50,233	$929	12/31/2023
ZI	50,233	$929	12/31/2023
Brant Point Investment Management LLC		$924	12/31/2023
Call	500	$924	12/31/2023
Scge Management L.P.	50,000	$924	12/31/2023
ZI	50,000	$924	12/31/2023
Eisler Capital UK Ltd.	49,565	$916	12/31/2023
ZI	49,565	$916	12/31/2023
Edgestream Partners L.P.	49,314	$912	12/31/2023
ZI	49,314	$912	12/31/2023
Texas Treasury Safekeeping Trust Co.	48,956	$905	12/31/2023
ZI	48,956	$905	12/31/2023
Tower Research Capital LLC TRC	47,947	$887	12/31/2023
ZI	47,947	$887	12/31/2023
Entropy Technologies LP	47,539	$879	12/31/2023
ZI	47,539	$879	12/31/2023
Accretive Wealth Partners LLC	47,299	$875	12/31/2023
ZI	47,299	$875	12/31/2023
Point72 Europe London LLP	46,681	$863	12/31/2023
ZI	46,681	$863	12/31/2023
JustInvest LLC	41,814	$773	12/31/2023
ZI	41,814	$773	12/31/2023
HarbourVest Partners LLC	38,693	$715	12/31/2023
ZI	38,693	$715	12/31/2023
Kinneret Advisory LLC	38,209	$706	12/31/2023
ZI	38,209	$706	12/31/2023
Quantbot Technologies LP	37,033	$685	12/31/2023
ZI	37,033	$685	12/31/2023
Bank of Montreal Can	35,830	$683	12/31/2023
ZI	35,830	$683	12/31/2023
D. E. Shaw & Co. Inc.		$649	12/31/2023
ZI	175,122	$3,238	12/31/2023
Put	140,000	$2,589	12/31/2023
Alberta Investment Management Corp	34,675	$641	12/31/2023
ZI	34,675	$641	12/31/2023
Pictet Asset Management Holding SA	34,006	$629	12/31/2023
ZI	34,006	$629	12/31/2023
Boothbay Fund Management LLC	33,710	$623	12/31/2023
ZI	33,710	$623	12/31/2023
Cetera Advisor Networks LLC	33,167	$613	12/31/2023
ZI	33,167	$613	12/31/2023
Sowell Financial Services LLC	32,691	$604	12/31/2023
ZI	32,691	$604	12/31/2023
Public Employees Retirement Association of Colorado	32,452	$600	12/31/2023
ZI	32,452	$600	12/31/2023
New York Life Investment Management LLC	32,296	$597	12/31/2023
ZI	32,296	$597	12/31/2023
Gotham Asset Management LLC	31,409	$581	12/31/2023
ZI	31,409	$581	12/31/2023
Korea Investment CORP	31,203	$577	12/31/2023
ZI	31,203	$577	12/31/2023
Collaborative Holdings Management LP	30,000	$555	12/31/2023
ZI	30,000	$555	12/31/2023
US Bancorp DE	28,617	$529	12/31/2023
ZI	28,617	$529	12/31/2023
Brevan Howard Capital Management LP	28,584	$529	12/31/2023
ZI	28,584	$529	12/31/2023
Ossiam	28,201	$521	12/31/2023
ZI	28,201	$521	12/31/2023
State of Alaska Department of Revenue	31,990	$512	03/31/2024
ZI	31,990	$512	03/31/2024
Kerrisdale Advisers LLC	27,390	$506	12/31/2023
ZI	27,390	$506	12/31/2023
Washington Capital Management Inc.	29,000	$465	03/31/2024
ZI	29,000	$465	03/31/2024
Securian Asset Management Inc	24,999	$462	12/31/2023
ZI	24,999	$462	12/31/2023
Cornerstone Investment Partners LLC	24,918	$461	12/31/2023
ZI	24,918	$461	12/31/2023
Janney Montgomery Scott LLC	24,648	$456	12/31/2023
ZI	24,648	$456	12/31/2023
Nomura Holdings Inc.	23,853	$441	12/31/2023
ZI	23,853	$441	12/31/2023
Jasper Ridge Partners L.P.	23,858	$441	12/31/2023
ZI	23,858	$441	12/31/2023
Prudential Financial Inc.	23,533	$435	12/31/2023
ZI	23,533	$435	12/31/2023
United Services Automobile Association	23,177	$429	12/31/2023
ZI	23,177	$429	12/31/2023
Mission Wealth Management LP	22,977	$425	12/31/2023
ZI	22,977	$425	12/31/2023
Hamilton Lane Advisors LLC	22,370	$414	12/31/2023
ZI	22,370	$414	12/31/2023
Crossmark Global Holdings Inc.	20,466	$379	12/31/2023
ZI	20,466	$379	12/31/2023
Maryland State Retirement & Pension System	24,653	$377	03/31/2024
ZI	24,653	$377	03/31/2024
Systematic Portfolios LLC	18,811	$348	12/31/2023
ZI	18,811	$348	12/31/2023
The PNC Financial Services Group Inc.	18,456	$341	12/31/2023
ZI	18,456	$341	12/31/2023
Advisor Group Holdings Inc.	18,227	$337	12/31/2023
ZI	18,227	$337	12/31/2023
American Century Companies Inc.	18,098	$335	12/31/2023
ZI	18,098	$335	12/31/2023
Ophir Asset Management Pty Ltd	17,830	$330	12/31/2023
ZI	17,830	$330	12/31/2023
Crawford Fund Management LLC		$324	12/31/2023
Call	17,500	$324	12/31/2023
Intech Investment Management LLC	17,137	$317	12/31/2023
ZI	17,137	$317	12/31/2023
Teacher Retirement System of Texas	16,044	$297	12/31/2023
ZI	16,044	$297	12/31/2023
Institute for Wealth Management LLC.	16,039	$297	12/31/2023
ZI	16,039	$297	12/31/2023
ProShare Advisors LLC	15,582	$288	12/31/2023
ZI	15,582	$288	12/31/2023
Cresset Asset Management LLC	15,581	$288	12/31/2023
ZI	15,581	$288	12/31/2023
Rakuten Securities Inc.	15,340	$284	12/31/2023
ZI	15,340	$284	12/31/2023
Envestnet Portfolio Solutions Inc.	15,172	$281	12/31/2023
ZI	15,172	$281	12/31/2023
Harbor Capital Advisors Inc.	14,895	$275	12/31/2023
ZI	14,895	$275	12/31/2023
Captrust Financial Advisors	14,849	$275	12/31/2023
ZI	14,849	$275	12/31/2023
Triumph Capital Management	13,145	$243	12/31/2023
ZI	13,145	$243	12/31/2023
Shelton Capital Management	12,976	$240	12/31/2023
ZI	12,976	$240	12/31/2023
Oak Thistle LLC	14,723	$236	03/31/2024
ZI	14,723	$236	03/31/2024
M&T Bank Corp	12,367	$229	12/31/2023
ZI	12,367	$229	12/31/2023
Verition Fund Management LLC	12,411	$229	12/31/2023
ZI	12,411	$229	12/31/2023
Natixis Advisors L.P.	12,298	$227	12/31/2023
ZI	12,298	$227	12/31/2023
Bell Bank	13,981	$224	03/31/2024
ZI	13,981	$224	03/31/2024
Daiwa Securities Group Inc.	11,926	$221	12/31/2023
ZI	11,926	$221	12/31/2023
Raymond James & Associates	13,192	$211	03/31/2024
ZI	13,192	$211	03/31/2024
MML Investors Services LLC	11,433	$211	12/31/2023
ZI	11,433	$211	12/31/2023
Rathbone Brothers plc	11,430	$211	12/31/2023
ZI	11,430	$211	12/31/2023
American Trust	11,326	$209	12/31/2023
ZI	11,326	$209	12/31/2023
KCM Investment Advisors LLC	11,204	$207	12/31/2023
ZI	11,204	$207	12/31/2023
Crestwood Advisors Group LLC	10,921	$202	12/31/2023
ZI	10,921	$202	12/31/2023
Aviva PLC	10,891	$201	12/31/2023
ZI	10,891	$201	12/31/2023
Pathstone Holdings LLC	10,604	$196	12/31/2023
ZI	10,604	$196	12/31/2023
Fjarde AP Fonden Fourth Swedish National Pension Fund	10,486	$194	12/31/2023
ZI	10,486	$194	12/31/2023
Ieq Capital LLC	10,341	$191	12/31/2023
ZI	10,341	$191	12/31/2023
AQR Capital Management LLC	10,056	$186	12/31/2023
ZI	10,056	$186	12/31/2023
Handelsinvest Investeringsforvaltning	9,854	$158	03/31/2024
ZI	9,854	$158	03/31/2024
Russell Investments Group Ltd.	7,900	$149	12/31/2023
ZI	7,900	$149	12/31/2023
Bessemer Group Inc.	7,180	$132	12/31/2023
ZI	7,180	$132	12/31/2023
Icon Wealth Advisors LLC	6,612	$122	12/31/2023
ZI	6,612	$122	12/31/2023
Wahed Invest LLC	5,130	$95	12/31/2023
ZI	5,130	$95	12/31/2023
Truvestments Capital LLC	4,966	$92	12/31/2023
ZI	4,966	$92	12/31/2023
DekaBank Deutsche Girozentrale	5,493	$85	03/31/2024
ZI	5,493	$85	03/31/2024
Benjamin F. Edwards & Company Inc.	3,946	$73	12/31/2023
ZI	3,946	$73	12/31/2023
Quadrant Capital Group LLC	3,885	$72	12/31/2023
ZI	3,885	$72	12/31/2023
Advisors Asset Management Inc.	3,417	$63	12/31/2023
ZI	3,417	$63	12/31/2023
Quest Partners LLC	3,328	$62	12/31/2023
ZI	3,328	$62	12/31/2023
Parkside Financial Bank & Trust	2,743	$51	12/31/2023
ZI	2,743	$51	12/31/2023
EntryPoint Capital LLC	2,595	$48	12/31/2023
ZI	2,595	$48	12/31/2023
Cutler Group LP		$42	03/31/2024
ZI	3,803	$60	03/31/2024
Put	9,400	$18	03/31/2024
Call	300	$0	03/31/2024
CWM LLC	2,644	$42	03/31/2024
ZI	2,644	$42	03/31/2024
Fifth Third Bancorp	2,381	$38	03/31/2024
ZI	2,381	$38	03/31/2024
Acadian Asset Management LLC	2,120	$38	12/31/2023
ZI	2,120	$38	12/31/2023
Allworth Financial LP	1,972	$36	12/31/2023
ZI	1,972	$36	12/31/2023
GAMMA Investing LLC	2,149	$34	03/31/2024
ZI	2,149	$34	03/31/2024
Benjamin Edwards Inc.	1,805	$33	12/31/2023
ZI	1,805	$33	12/31/2023
Skandinaviska Enskilda Banken AB publ	1,754	$32	12/31/2023
ZI	1,754	$32	12/31/2023
Edmond DE Rothschild Holding S.A.	1,504	$28	12/31/2023
ZI	1,504	$28	12/31/2023
Quarry LP	1,527	$28	12/31/2023
ZI	1,527	$28	12/31/2023
Steward Partners Investment Advisory LLC	1,460	$27	12/31/2023
ZI	1,460	$27	12/31/2023
Smartleaf Asset Management LLC	1,450	$27	12/31/2023
ZI	1,450	$27	12/31/2023
Guinness Atkinson Asset Management Inc	1,542	$25	03/31/2024
ZI	1,542	$25	03/31/2024
Signaturefd LLC	1,221	$23	12/31/2023
ZI	1,221	$23	12/31/2023
Advisory Services Network LLC	1,200	$22	12/31/2023
ZI	1,200	$22	12/31/2023
Washington Trust Advisors Inc.	1,167	$22	12/31/2023
ZI	1,167	$22	12/31/2023
Venturi Wealth Management LLC	1,161	$19	03/31/2024
ZI	1,161	$19	03/31/2024
Ancora Advisors LLC	1,000	$18	12/31/2023
ZI	1,000	$18	12/31/2023
EverSource Wealth Advisors LLC	947	$18	12/31/2023
ZI	947	$18	12/31/2023
Rise Advisors LLC	1,070	$17	03/31/2024
ZI	1,070	$17	03/31/2024
Turtle Creek Wealth Advisors LLC	900	$17	12/31/2023
ZI	900	$17	12/31/2023
Stephens Inc. AR	799	$15	12/31/2023
ZI	799	$15	12/31/2023
Lindbrook Capital LLC	823	$15	12/31/2023
ZI	823	$15	12/31/2023
Huntington National Bank	524	$10	12/31/2023
ZI	524	$10	12/31/2023
SYSTM Wealth Solutions LLC	518	$10	12/31/2023
ZI	518	$10	12/31/2023
Covestor Ltd	478	$9	12/31/2023
ZI	478	$9	12/31/2023
Capital Advisors Ltd. LLC	471	$8	03/31/2024
ZI	471	$8	03/31/2024
Park Place Capital Corp	519	$8	03/31/2024
ZI	519	$8	03/31/2024
CI Investments Inc.	435	$8	12/31/2023
ZI	435	$8	12/31/2023
Manchester Capital Management LLC	409	$8	12/31/2023
ZI	409	$8	12/31/2023
Two Sigma Securities LLC		$8	12/31/2023
ZI	41,222	$762	12/31/2023
Put	40,800	$754	12/31/2023
Performa Ltd US LLC	450	$8	12/31/2023
ZI	450	$8	12/31/2023
Glassman Wealth Services	357	$7	12/31/2023
ZI	357	$7	12/31/2023
Parallel Advisors LLC	397	$7	12/31/2023
ZI	397	$7	12/31/2023
Colonial Trust Co SC	298	$6	12/31/2023
ZI	298	$6	12/31/2023
West Oak Capital LLC	300	$5	03/31/2024
ZI	300	$5	03/31/2024
Principal Securities Inc.	258	$5	12/31/2023
ZI	258	$5	12/31/2023
First Horizon Advisors Inc.	295	$5	12/31/2023
ZI	295	$5	12/31/2023
Cornerstone Planning Group LLC	290	$5	12/31/2023
ZI	290	$5	12/31/2023
Ronald Blue Trust Inc.	285	$5	12/31/2023
ZI	285	$5	12/31/2023
Arcadia Investment Management Corp MI	250	$4	03/31/2024
ZI	250	$4	03/31/2024
Sunbelt Securities Inc.	222	$4	03/31/2024
ZI	222	$4	03/31/2024
Nisa Investment Advisors LLC	220	$4	12/31/2023
ZI	220	$4	12/31/2023
Operose Advisors LLC	217	$4	12/31/2023
ZI	217	$4	12/31/2023
Private Wealth Management Group LLC	230	$4	12/31/2023
ZI	230	$4	12/31/2023
Global Retirement Partners LLC	215	$3	03/31/2024
ZI	215	$3	03/31/2024
Proequities Inc.		$3	12/31/2023
ZI	168	$3	12/31/2023
Put	0	$0	12/31/2023
Call	0	$0	12/31/2023
Mitsubishi UFJ Kokusai Asset Management Co. Ltd.	188	$3	12/31/2023
ZI	188	$3	12/31/2023
Bellevue Asset Management LLC	154	$3	12/31/2023
ZI	154	$3	12/31/2023
Quent Capital LLC	157	$3	12/31/2023
ZI	157	$3	12/31/2023
Massmutual Trust Co. FSB ADV	141	$2	03/31/2024
ZI	141	$2	03/31/2024
Farmers & Merchants Investments Inc.	110	$2	03/31/2024
ZI	110	$2	03/31/2024
Moisand Fitzgerald Tamayo LLC	100	$2	03/31/2024
ZI	100	$2	03/31/2024
West Branch Capital LLC	150	$2	03/31/2024
ZI	150	$2	03/31/2024
Cedar Mountain Advisors LLC	147	$2	03/31/2024
ZI	147	$2	03/31/2024
SJS Investment Consulting Inc.	110	$2	03/31/2024
ZI	110	$2	03/31/2024
Register Financial Advisors LLC	100	$2	03/31/2024
ZI	100	$2	03/31/2024
Plante Moran Financial Advisors LLC	132	$2	12/31/2023
ZI	132	$2	12/31/2023
Grove Bank & Trust	85	$2	12/31/2023
ZI	85	$2	12/31/2023
Bell Investment Advisors Inc	119	$2	12/31/2023
ZI	119	$2	12/31/2023
Tidemark LLC	130	$2	12/31/2023
ZI	130	$2	12/31/2023
Spire Wealth Management	56	$1	03/31/2024
ZI	56	$1	03/31/2024
Bruce G. Allen Investments LLC	73	$1	03/31/2024
ZI	73	$1	03/31/2024
Avion Wealth	79	$1	12/31/2023
ZI	79	$1	12/31/2023
TFC Financial Management	50	$1	12/31/2023
ZI	50	$1	12/31/2023
RFP Financial Group LLC	65	$1	12/31/2023
ZI	65	$1	12/31/2023
Cherry Tree Wealth Management LLC	52	$1	12/31/2023
ZI	52	$1	12/31/2023
Financial Management Professionals Inc.	20	$0	03/31/2024
ZI	20	$0	03/31/2024
MV Capital Management Inc.	28	$0	03/31/2024
ZI	28	$0	03/31/2024
Tudor Investment Corp Et Al		$0	12/31/2023
Put	18,300	$338	12/31/2023
Call	18,300	$338	12/31/2023
TA Associates L.P.	0	$0	12/31/2023
ZI	0	$0	12/31/2023
Nomura Asset Management Co. Ltd.	0	$0	12/31/2023
ZI	0	$0	12/31/2023
Bluefin Capital Management LLC		$0	12/31/2023
Call	12,800	$0	12/31/2023
JFS Wealth Advisors LLC	24	$0	12/31/2023
ZI	24	$0	12/31/2023
SRS Capital Advisors Inc.	12	$0	12/31/2023
ZI	12	$0	12/31/2023
GWM Advisors LLC	22	$0	12/31/2023
ZI	22	$0	12/31/2023
IFP Advisors Inc	0	$0	12/31/2023
ZI	0	$0	12/31/2023
DiNuzzo Private Wealth Inc.	4	$0	12/31/2023
ZI	4	$0	12/31/2023
IMC Chicago LLC		$-1,377	03/31/2024
Put	282,400	$4,527	03/31/2024
Call	100,300	$1,608	03/31/2024
ZI	96,193	$1,542	03/31/2024
Simplex Trading LLC	103,248	$-1,870	12/31/2023
Put	636,000	$11,759	12/31/2023
Call	431,600	$7,980	12/31/2023
ZI	103,248	$1,909	12/31/2023

See Summary: Institutional Holders of ZI
See Details: Top 10 Hedge Funds Holding ZI
Also See: ZI Holdings Changes

ZI — Current Quote

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ZI — Performance