On this page, we present all of the funds holding SPOK from our database of 13F filers, detailed in the table below. The first column indicates the name of each of the funds holding SPOK, with a link to that fund's top holdings. The next columns indicate the amount of SPOK stock held by each of the funds holding SPOK, followed by the SPOK position size held by the fund, and lastly the date of the quarterly filing period the data represents. In total, we count 108 funds holding SPOK within the last two filing periods in our coverage universe of 13F filers, with the largest position size having been reported by BlackRock Inc.. For more details on the positions held by BlackRock Inc. (or by any of the other funds holding SPOK), click the fund name in the "Holder" column of the funds-holding-SPOK table below.

Holder	Amount	Position Size ($ in 1000's)	As of
BlackRock Inc.	1,409,039	$21,812	12/31/2023
SPOK	1,409,039	$21,812	12/31/2023
Vanguard Group Inc.	994,313	$15,392	12/31/2023
SPOK	994,313	$15,392	12/31/2023
Renaissance Technologies LLC	974,222	$15,081	12/31/2023
SPOK	974,222	$15,081	12/31/2023
Dimensional Fund Advisors LP	736,997	$11,409	12/31/2023
SPOK	736,997	$11,409	12/31/2023
HighTower Advisors LLC	640,170	$9,909	12/31/2023
SPOK	640,170	$9,909	12/31/2023
Foundry Partners LLC	447,290	$6,924	12/31/2023
SPOK	447,290	$6,924	12/31/2023
Geode Capital Management LLC	440,671	$6,822	12/31/2023
SPOK	440,671	$6,822	12/31/2023
State Street Corp	391,461	$6,060	12/31/2023
SPOK	391,461	$6,060	12/31/2023
Acadian Asset Management LLC	350,020	$5,416	12/31/2023
SPOK	350,020	$5,416	12/31/2023
Nuveen Asset Management LLC	346,400	$5,362	12/31/2023
SPOK	346,400	$5,362	12/31/2023
Prudential Financial Inc.	306,740	$4,748	12/31/2023
SPOK	306,740	$4,748	12/31/2023
Fuller & Thaler Asset Management Inc.	251,123	$3,887	12/31/2023
SPOK	251,123	$3,887	12/31/2023
Bank of New York Mellon Corp	229,907	$3,667	03/31/2024
SPOK	229,907	$3,667	03/31/2024
Two Sigma Advisers LP	215,400	$3,334	12/31/2023
SPOK	215,400	$3,334	12/31/2023
Northern Trust Corp	202,117	$3,129	12/31/2023
SPOK	202,117	$3,129	12/31/2023
Morgan Stanley	195,102	$3,020	12/31/2023
SPOK	195,102	$3,020	12/31/2023
Uniplan Investment Counsel Inc.	156,409	$2,421	12/31/2023
SPOK	156,409	$2,421	12/31/2023
Prelude Capital Management LLC	155,835	$2,412	12/31/2023
SPOK	155,835	$2,412	12/31/2023
Two Sigma Investments LP	143,128	$2,216	12/31/2023
SPOK	143,128	$2,216	12/31/2023
Allspring Global Investments Holdings LLC	88,773	$1,416	03/31/2024
SPOK	88,773	$1,416	03/31/2024
Invesco Ltd.	74,011	$1,146	12/31/2023
SPOK	74,011	$1,146	12/31/2023
GSA Capital Partners LLP	68,868	$1,066	12/31/2023
SPOK	68,868	$1,066	12/31/2023
Goldman Sachs Group Inc.	61,350	$950	12/31/2023
SPOK	61,350	$950	12/31/2023
Campbell & CO Investment Adviser LLC	55,951	$866	12/31/2023
SPOK	55,951	$866	12/31/2023
Advisor Group Holdings Inc.	55,807	$864	12/31/2023
SPOK	55,807	$864	12/31/2023
First Trust Advisors LP	54,908	$850	12/31/2023
SPOK	54,908	$850	12/31/2023
DZ BANK AG Deutsche Zentral Genossenschafts Bank Frankfurt am Main	54,459	$843	12/31/2023
SPOK	54,459	$843	12/31/2023
Connor Clark & Lunn Investment Management Ltd.	52,543	$813	12/31/2023
SPOK	52,543	$813	12/31/2023
Charles Schwab Investment Management Inc.	50,864	$787	12/31/2023
SPOK	50,864	$787	12/31/2023
Los Angeles Capital Management & Equity Research Inc.	48,900	$780	03/31/2024
SPOK	48,900	$780	03/31/2024
Janney Montgomery Scott LLC	43,982	$681	12/31/2023
SPOK	43,982	$681	12/31/2023
Citadel Advisors LLC		$639	12/31/2023
SPOK	40,013	$619	12/31/2023
Call	15,500	$240	12/31/2023
Put	14,200	$220	12/31/2023
Aviva PLC	38,967	$603	12/31/2023
SPOK	38,967	$603	12/31/2023
UBS Group AG	37,532	$581	12/31/2023
SPOK	37,532	$581	12/31/2023
Strs Ohio	36,500	$565	12/31/2023
SPOK	36,500	$565	12/31/2023
Hennion & Walsh Asset Management Inc.	34,738	$554	03/31/2024
SPOK	34,738	$554	03/31/2024
EAM Investors LLC	34,309	$531	12/31/2023
SPOK	34,309	$531	12/31/2023
Kennedy Capital Management Inc.	28,713	$444	12/31/2023
SPOK	28,713	$444	12/31/2023
Bank of America Corp DE	25,941	$402	12/31/2023
SPOK	25,941	$402	12/31/2023
Rhumbline Advisers	25,968	$402	12/31/2023
SPOK	25,968	$402	12/31/2023
Royal Bank of Canada	25,790	$399	12/31/2023
SPOK	25,790	$399	12/31/2023
Barclays PLC	24,413	$377	12/31/2023
SPOK	24,413	$377	12/31/2023
Significant Wealth Partners LLC	23,547	$365	12/31/2023
SPOK	23,547	$365	12/31/2023
LSV Asset Management	21,700	$336	12/31/2023
SPOK	21,700	$336	12/31/2023
WINTON GROUP Ltd	19,902	$308	12/31/2023
SPOK	19,902	$308	12/31/2023
Guggenheim Capital LLC	19,511	$302	12/31/2023
SPOK	19,511	$302	12/31/2023
Franklin Resources Inc.	18,738	$290	12/31/2023
SPOK	18,738	$290	12/31/2023
Trexquant Investment LP	18,511	$287	12/31/2023
SPOK	18,511	$287	12/31/2023
Susquehanna International Group LLP		$278	12/31/2023
Put	37,500	$580	12/31/2023
Call	33,100	$512	12/31/2023
SPOK	22,374	$346	12/31/2023
Cambridge Investment Research Advisors Inc.	17,393	$277	03/31/2024
SPOK	17,393	$277	03/31/2024
Man Group plc	17,100	$265	12/31/2023
SPOK	17,100	$265	12/31/2023
Jacobs Levy Equity Management Inc.	16,555	$256	12/31/2023
SPOK	16,555	$256	12/31/2023
Johnson Investment Counsel Inc.	16,070	$249	12/31/2023
SPOK	16,070	$249	12/31/2023
Wells Fargo & Company MN	15,512	$240	12/31/2023
SPOK	15,512	$240	12/31/2023
Group One Trading L.P.		$236	12/31/2023
Call	13,900	$215	12/31/2023
SPOK	1,488	$23	12/31/2023
Put	100	$2	12/31/2023
Martingale Asset Management L P	15,117	$234	12/31/2023
SPOK	15,117	$234	12/31/2023
State Board of Administration of Florida Retirement System	14,994	$232	12/31/2023
SPOK	14,994	$232	12/31/2023
Jane Street Group LLC	14,877	$230	12/31/2023
SPOK	14,877	$230	12/31/2023
Bank of Montreal Can	14,100	$221	12/31/2023
SPOK	14,100	$221	12/31/2023
SG Americas Securities LLC	14,288	$221	12/31/2023
SPOK	14,288	$221	12/31/2023
Mariner LLC	14,239	$220	12/31/2023
SPOK	14,239	$220	12/31/2023
Lazard Asset Management LLC	12,126	$187	12/31/2023
SPOK	12,126	$187	12/31/2023
Qube Research & Technologies Ltd	12,007	$186	12/31/2023
SPOK	12,007	$186	12/31/2023
Captrust Financial Advisors	11,934	$185	12/31/2023
SPOK	11,934	$185	12/31/2023
JPMorgan Chase & Co.	11,837	$183	12/31/2023
SPOK	11,837	$183	12/31/2023
DekaBank Deutsche Girozentrale	11,442	$180	03/31/2024
SPOK	11,442	$180	03/31/2024
Grantham Mayo Van Otterloo & Co. LLC	10,878	$168	12/31/2023
SPOK	10,878	$168	12/31/2023
Thompson Davis & CO. Inc.	10,800	$167	12/31/2023
SPOK	10,800	$167	12/31/2023
Citigroup Inc.	10,030	$155	12/31/2023
SPOK	10,030	$155	12/31/2023
BCJ Capital Management LLC	10,027	$155	12/31/2023
SPOK	10,027	$155	12/31/2023
Benchmark Investment Advisors LLC	10,027	$155	12/31/2023
SPOK	10,027	$155	12/31/2023
State of Wyoming	9,605	$149	12/31/2023
SPOK	9,605	$149	12/31/2023
FMR LLC	9,373	$145	12/31/2023
SPOK	9,373	$145	12/31/2023
MetLife Investment Management LLC	9,363	$145	12/31/2023
SPOK	9,363	$145	12/31/2023
Deutsche Bank AG	9,218	$143	12/31/2023
SPOK	9,218	$143	12/31/2023
American International Group Inc.	8,836	$137	12/31/2023
SPOK	8,836	$137	12/31/2023
Tucker Asset Management LLC	8,163	$126	12/31/2023
SPOK	8,163	$126	12/31/2023
Great West Life Assurance Co. Can	7,484	$116	12/31/2023
SPOK	7,484	$116	12/31/2023
New York State Common Retirement Fund	7,450	$115	12/31/2023
SPOK	7,450	$115	12/31/2023
Tower Research Capital LLC TRC	4,913	$76	12/31/2023
SPOK	4,913	$76	12/31/2023
BNP Paribas Arbitrage SA	4,693	$73	12/31/2023
SPOK	4,693	$73	12/31/2023
EntryPoint Capital LLC	3,335	$52	12/31/2023
SPOK	3,335	$52	12/31/2023
Northwestern Mutual Wealth Management Co.	3,170	$49	12/31/2023
SPOK	3,170	$49	12/31/2023
California State Teachers Retirement System	2,926	$45	12/31/2023
SPOK	2,926	$45	12/31/2023
Public Employees Retirement System of Ohio	1,933	$30	12/31/2023
SPOK	1,933	$30	12/31/2023
Covestor Ltd	1,870	$29	12/31/2023
SPOK	1,870	$29	12/31/2023
Ameritas Investment Partners Inc.	1,468	$23	12/31/2023
SPOK	1,468	$23	12/31/2023
Legal & General Group Plc	1,426	$22	12/31/2023
SPOK	1,426	$22	12/31/2023
US Bancorp DE	1,266	$20	12/31/2023
SPOK	1,266	$20	12/31/2023
Metropolitan Life Insurance Co NY	970	$15	12/31/2023
SPOK	970	$15	12/31/2023
Amalgamated Bank	600	$10	03/31/2024
SPOK	600	$10	03/31/2024
Bank of New Hampshire	570	$9	03/31/2024
SPOK	570	$9	03/31/2024
Russell Investments Group Ltd.	609	$9	12/31/2023
SPOK	609	$9	12/31/2023
CWM LLC	306	$5	03/31/2024
SPOK	306	$5	03/31/2024
McIlrath & Eck LLC	211	$3	12/31/2023
SPOK	211	$3	12/31/2023
WealthCollab LLC	185	$3	12/31/2023
SPOK	185	$3	12/31/2023
Parallel Advisors LLC	137	$2	12/31/2023
SPOK	137	$2	12/31/2023
Steward Partners Investment Advisory LLC	100	$2	12/31/2023
SPOK	100	$2	12/31/2023
Capital Advisors Ltd. LLC	65	$1	03/31/2024
SPOK	65	$1	03/31/2024
Signaturefd LLC	72	$1	12/31/2023
SPOK	72	$1	12/31/2023
Farther Finance Advisors LLC	95	$1	12/31/2023
SPOK	95	$1	12/31/2023
Private Wealth Management Group LLC	34	$1	12/31/2023
SPOK	34	$1	12/31/2023
Gradient Investments LLC	0	$0	03/31/2024
SPOK	0	$0	03/31/2024
Versant Capital Management Inc	17	$0	03/31/2024
SPOK	17	$0	03/31/2024
The PNC Financial Services Group Inc.	12	$0	12/31/2023
SPOK	12	$0	12/31/2023
Proequities Inc.		$0	12/31/2023
Put	0	$0	12/31/2023
Call	0	$0	12/31/2023
SPOK	0	$0	12/31/2023
Nisa Investment Advisors LLC	15	$0	12/31/2023
SPOK	15	$0	12/31/2023
Quadrant Capital Group LLC	21	$0	12/31/2023
SPOK	21	$0	12/31/2023
Simplex Trading LLC	1,879	$-11	03/31/2024
Put	5,300	$84	03/31/2024
Call	2,800	$44	03/31/2024
SPOK	1,879	$29	03/31/2024