Spok Holdings (SPOK)

Spok Holdings on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as radiotelephone communications.

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656K

Short interest

settlement 2026-10-15

5.3

Days to cover

+0.1 days vs prior

63.3%

Short share of volume

2026-10-28

136

Fails to deliver

settlement 2026-09-18

Wed 24 Feb

Next earnings

estimated date

-$320K

Insider flow, 90 days

0 buys, 2 sells

As of 2026-10-28.

Short interest

FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSON

As of 15 October 2026, short interest in SPOK is 655,518 shares, down 24,143 shares over the last month. Over the last 48 readings it ranged from 131,206 shares (13 June 2025) to 691,441 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 123K shares a day that is 5.3 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	655,518	-5.2%	122,864	5.34
2026-09-30	691,441	+1.7%	132,798	5.21
2026-09-15	679,661	+14.4%	118,184	5.75
2026-08-31	593,895	+1.2%	179,840	3.30
2026-08-14	586,769	+1.6%	175,351	3.35
2026-07-31	577,280	+3.0%	141,131	4.09
2026-07-15	560,202	+15.7%	146,668	3.82
2026-06-30	484,020	+5.5%	241,864	2.00
2026-06-15	458,730	-14.2%	137,259	3.34
2026-05-29	534,481	-3.3%	172,688	3.10
2026-05-15	552,947	+13.3%	197,818	2.80
2026-04-30	487,949	+7.2%	150,307	3.25
2026-04-15	455,214	-12.5%	155,096	2.94
2026-03-31	520,296	-2.4%	175,666	2.96
2026-03-13	532,995	-7.7%	184,374	2.89
2026-02-27	577,687	+26.3%	266,382	2.17
2026-02-13	457,339	+6.8%	149,365	3.06
2026-01-30	428,096	+30.4%	166,939	2.56
2026-01-15	328,368	+22.6%	159,449	2.06
2025-12-31	267,833	-15.4%	167,184	1.60
2025-12-15	316,567	-8.3%	161,305	1.96
2025-11-28	345,238	+37.3%	189,022	1.83
2025-11-14	251,484	-14.6%	166,862	1.51
2025-10-31	294,487	-6.0%	166,366	1.77
2025-10-15	313,346	-0.8%	122,332	2.56
2025-09-30	315,728	-2.2%	83,630	3.78
2025-09-15	322,802	-1.1%	112,006	2.88
2025-08-29	326,572	+22.6%	141,618	2.31
2025-08-15	266,369	+66.7%	193,998	1.37
2025-07-31	159,761	-3.6%	98,331	1.62
2025-07-15	165,768	+2.3%	112,393	1.47
2025-06-30	162,126	+23.6%	132,239	1.23
2025-06-13	131,206	-2.9%	80,931	1.62
2025-05-30	135,078	-4.6%	121,120	1.12
2025-05-15	141,544	-49.0%	170,045	1.00
2025-04-30	277,643	-5.3%	186,700	1.49
2025-04-15	293,159	+4.5%	161,393	1.82
2025-03-31	280,439	+7.3%	102,368	2.74
2025-03-14	261,429	-10.4%	185,265	1.41
2025-02-28	291,837	-8.0%	133,074	2.19
2025-02-14	317,211	-1.9%	76,422	4.15
2025-01-31	323,302	-6.6%	90,577	3.57
2025-01-15	345,983	-1.6%	77,696	4.45
2024-12-31	351,722	+18.7%	112,274	3.13
2024-12-13	296,348	+17.1%	90,467	3.28
2024-11-29	253,106	-30.8%	96,813	2.61
2024-11-15	365,949	+28.3%	145,058	2.52
2024-10-31	285,330	-3.3%	91,112	3.13

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 28 October 2026, the short share of SPOK volume is 63.3%, up 4.9 points over the last five sessions. Over the last 30 readings it ranged from 32.4% (18 September 2026) to 71.1% (1 October 2026). The latest reading is 8.3 points above the 30-session average of 55.0%, on 77K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-28	49K	77K	63.3%	0
2026-10-27	59K	98K	60.7%	30
2026-10-26	58K	103K	56.1%	0
2026-10-23	29K	50K	58.2%	56
2026-10-22	34K	60K	57.4%	0
2026-10-21	24K	40K	58.5%	1
2026-10-20	18K	37K	47.8%	0
2026-10-19	23K	56K	41.4%	0
2026-10-16	34K	74K	45.6%	613
2026-10-15	25K	44K	56.5%	0
2026-10-14	20K	34K	59.0%	5,700
2026-10-13	26K	40K	65.3%	0
2026-10-12	26K	54K	48.4%	0
2026-10-09	25K	40K	63.3%	0
2026-10-08	14K	35K	41.0%	0
2026-10-07	22K	51K	44.0%	1,224
2026-10-06	28K	64K	43.8%	1
2026-10-05	54K	88K	60.9%	162
2026-10-02	29K	48K	59.9%	0
2026-10-01	32K	45K	71.1%	0
2026-09-30	24K	49K	48.1%	0
2026-09-29	22K	44K	51.3%	0
2026-09-28	26K	45K	58.0%	1
2026-09-25	34K	56K	60.1%	0
2026-09-24	26K	59K	43.4%	0
2026-09-23	22K	35K	62.4%	1
2026-09-22	53K	75K	70.4%	0
2026-09-21	26K	50K	53.2%	0
2026-09-18	14K	44K	32.4%	205
2026-09-17	35K	50K	69.9%	30

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 18 September 2026, the fails-to-deliver balance in SPOK is 136 shares, down 744 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (10 September 2026) to 2,514 shares (17 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-18	136	$10.40	$1K
2026-09-14	880	$10.65	$9K
2026-09-10	1	$10.57	$11
2026-09-02	11	$10.56	$116
2026-09-01	3	$10.51	$32
2026-08-11	463	$11.33	$5K
2026-07-28	227	$10.81	$2K
2026-06-17	2,514	$10.48	$26K
2026-05-26	1,087	$10.96	$12K
2026-05-12	431	$10.66	$5K
2026-04-30	156	$11.05	$2K
2026-04-23	244	$11.32	$3K
2026-04-22	837	$11.24	$9K
2026-04-20	4	$11.50	$46
2026-04-10	168	$11.29	$2K
2026-04-07	175	$11.10	$2K
2026-04-01	322	$10.90	$4K
2026-03-25	2,503	$11.27	$28K
2026-03-09	117	$12.54	$1K
2026-03-06	235	$12.41	$3K
2026-03-03	563	$12.11	$7K
2026-03-02	324	$12.14	$4K
2026-02-05	29	$13.50	$392
2026-01-05	7	$13.00	$91
2025-12-10	407	$13.18	$5K
2025-11-28	2,323	$13.30	$31K
2025-11-20	796	$12.56	$10K
2025-11-18	856	$13.37	$11K
2025-11-06	1,097	$13.68	$15K
2025-11-03	743	$14.29	$11K

Insider trades

SEC Form 4, newest first. JSON

Insiders at SPOK reported 2 open-market sells worth $320K in the last 90 days and no open-market buys. Latest filing: Stein Todd J (Director) on 2026-10-01.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-10-01	Stein Todd J	Director	Grant	0	$0.00	$0	567K
2026-10-01	Stein Todd J	Director	Grant	0	$0.00	$0	533K
2026-10-01	Stein Todd J	Director	Grant	2K	$10.49	$25K	53K
2026-10-01	SHOCKLEY BRETT A	Director	Grant	2K	$10.49	$25K	43K
2026-10-01	Hyun Randy	Director	Grant	2K	$10.49	$25K	41K
2026-10-01	COURNOYER CHRISTINE	Director	Grant	2K	$10.49	$25K	19K
2026-10-01	Byrne Barbara Peterson	Director	Grant	2K	$10.49	$25K	49K
2026-08-10	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Sell	20K	$11.30	$226K	6K
2026-08-10	COURNOYER CHRISTINE	Director	Sell	8K	$11.28	$94K	16K
2026-07-01	Stein Todd J	Director	Grant	0	$0.00	$0	567K
2026-07-01	Stein Todd J	Director	Grant	0	$0.00	$0	533K
2026-07-01	Stein Todd J	Director	Grant	2K	$10.24	$25K	51K
2026-07-01	SHOCKLEY BRETT A	Director	Grant	2K	$10.24	$25K	41K
2026-07-01	Hyun Randy	Director	Grant	2K	$10.24	$25K	39K
2026-07-01	COURNOYER CHRISTINE	Director	Grant	2K	$10.24	$25K	25K
2026-07-01	Byrne Barbara Peterson	Director	Grant	2K	$10.24	$25K	46K
2026-06-16	Stein Todd J	Director	Buy	0	$0.00	$0	567K
2026-06-16	Stein Todd J	Director	Buy	35K	$10.41	$367K	533K
2026-06-16	Stein Todd J	Director	Buy	0	$0.00	$0	48K
2026-05-12	KELLY VINCENT D	President & CEO	Buy	5K	$10.70	$53K	168K
2026-05-11	KELLY VINCENT D	President & CEO	Buy	5K	$10.67	$53K	163K
2026-05-05	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Sell	10K	$11.00	$110K	26K
2026-04-14	Rice Calvin	Chief Financial Officer & CAO	Grant	0	$0.00	$0	21K
2026-04-01	Stein Todd J	Director	Grant	0	$0.00	$0	567K
2026-04-01	Stein Todd J	Director	Grant	0	$0.00	$0	498K
2026-04-01	Stein Todd J	Director	Grant	2K	$10.90	$25K	48K
2026-04-01	SHOCKLEY BRETT A	Director	Grant	2K	$10.90	$25K	38K
2026-04-01	Hyun Randy	Director	Grant	2K	$10.90	$25K	37K
2026-04-01	COURNOYER CHRISTINE	Director	Grant	2K	$10.90	$25K	22K
2026-04-01	Byrne Barbara Peterson	Director	Grant	2K	$10.90	$25K	44K
2026-03-04	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Tax withholding	4K	$12.14	$54K	36K
2026-03-04	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Grant	3K	$12.14	$42K	41K
2026-03-04	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Exercise or conversion	11K	$12.14	$139K	37K
2026-03-04	WALLACE MICHAEL W	Chief Operating Officer	Tax withholding	18K	$12.14	$217K	74K
2026-03-04	WALLACE MICHAEL W	Chief Operating Officer	Grant	9K	$12.14	$111K	92K
2026-03-04	WALLACE MICHAEL W	Chief Operating Officer	Exercise or conversion	31K	$12.14	$371K	83K
2026-03-04	Rice Calvin	Chief Financial Officer & CAO	Tax withholding	9K	$12.14	$106K	21K
2026-03-04	Rice Calvin	Chief Financial Officer & CAO	Grant	4K	$12.14	$50K	30K
2026-03-04	Rice Calvin	Chief Financial Officer & CAO	Exercise or conversion	14K	$12.14	$167K	26K
2026-03-04	KELLY VINCENT D	President & CEO	Tax withholding	29K	$12.14	$348K	158K
2026-03-04	KELLY VINCENT D	President & CEO	Grant	15K	$12.14	$178K	186K
2026-03-04	KELLY VINCENT D	President & CEO	Exercise or conversion	49K	$12.14	$593K	172K
2026-01-05	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Tax withholding	3K	$13.19	$41K	26K
2026-01-05	Woods-Keisling Sharon	Corporate Secretary, Treasurer	Exercise or conversion	9K	$13.19	$115K	29K
2026-01-05	WALLACE MICHAEL W	Chief Operating Officer	Tax withholding	11K	$13.19	$145K	52K
2026-01-05	WALLACE MICHAEL W	Chief Operating Officer	Exercise or conversion	23K	$13.19	$302K	63K
2026-01-05	Rice Calvin	Chief Financial Officer & CAO	Tax withholding	6K	$13.19	$82K	12K
2026-01-05	Rice Calvin	Chief Financial Officer & CAO	Exercise or conversion	11K	$13.19	$151K	18K
2026-01-05	KELLY VINCENT D	President & CEO	Tax withholding	18K	$13.19	$231K	123K
2026-01-05	KELLY VINCENT D	President & CEO	Exercise or conversion	37K	$13.19	$494K	140K
2026-01-02	Stein Todd J	Director	Grant	0	$0.00	$0	567K
2026-01-02	Stein Todd J	Director	Grant	0	$0.00	$0	498K
2026-01-02	Stein Todd J	Director	Grant	2K	$13.19	$25K	46K
2026-01-02	SHOCKLEY BRETT A	Director	Grant	2K	$13.19	$25K	36K
2026-01-02	Hyun Randy	Director	Grant	2K	$13.19	$25K	34K
2026-01-02	COURNOYER CHRISTINE	Director	Grant	2K	$13.19	$25K	20K
2026-01-02	Byrne Barbara Peterson	Director	Grant	2K	$13.19	$25K	42K
2025-10-01	Stein Todd J	Director	Grant	0	$0.00	$0	567K
2025-10-01	Stein Todd J	Director	Grant	0	$0.00	$0	498K
2025-10-01	Stein Todd J	Director	Grant	1K	$17.25	$25K	44K
2025-10-01	SHOCKLEY BRETT A	Director	Grant	1K	$17.25	$25K	34K
2025-10-01	Hyun Randy	Director	Grant	1K	$17.25	$25K	32K
2025-10-01	COURNOYER CHRISTINE	Director	Grant	1K	$17.25	$25K	18K
2025-10-01	Byrne Barbara Peterson	Director	Grant	1K	$17.25	$25K	40K
2025-09-04	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-09-04	Stein Todd J	Director	Sell	21K	$18.08	$371K	567K
2025-09-04	Stein Todd J	Director	Sell	17K	$18.08	$316K	498K
2025-09-03	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-09-03	Stein Todd J	Director	Sell	25K	$18.02	$459K	587K
2025-09-03	Stein Todd J	Director	Sell	18K	$18.02	$322K	515K
2025-09-02	Stein Todd J	Director	Sell	12K	$18.05	$221K	613K
2025-09-02	Stein Todd J	Director	Sell	10K	$18.05	$189K	533K
2025-08-25	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-25	Stein Todd J	Director	Sell	6K	$17.95	$114K	625K
2025-08-25	Stein Todd J	Director	Sell	5K	$17.95	$97K	543K
2025-08-25	WALLACE MICHAEL W	Chief Operating Officer	Sell	11K	$17.87	$193K	40K
2025-08-22	Stein Todd J	Director	Sell	5K	$18.01	$86K	632K
2025-08-22	Stein Todd J	Director	Sell	4K	$18.01	$74K	549K
2025-08-21	KELLY VINCENT D	President & CEO	Sell	25K	$17.69	$442K	103K
2025-08-20	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-20	Stein Todd J	Director	Sell	7K	$18.10	$129K	636K
2025-08-20	Stein Todd J	Director	Sell	6K	$18.10	$110K	553K
2025-08-18	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-18	Stein Todd J	Director	Sell	15K	$18.37	$281K	643K
2025-08-18	Stein Todd J	Director	Sell	13K	$18.37	$240K	559K
2025-08-15	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-15	Stein Todd J	Director	Sell	18K	$18.44	$333K	659K
2025-08-15	Stein Todd J	Director	Sell	15K	$18.44	$283K	572K
2025-08-14	Stein Todd J	Director	Sell	44K	$18.50	$818K	677K
2025-08-14	Stein Todd J	Director	Sell	19K	$18.50	$351K	587K
2025-08-13	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-13	Stein Todd J	Director	Sell	0	$0.00	$0	721K
2025-08-13	Stein Todd J	Director	Sell	0	$0.00	$0	606K
2025-08-13	Stein Todd J	Director	Sell	32K	$18.48	$590K	0
2025-08-12	Stein Todd J	Director	Sell	41K	$18.45	$764K	32K
2025-08-05	Stein Todd J	Director	Sell	0	$0.00	$0	43K
2025-08-05	Stein Todd J	Director	Sell	0	$0.00	$0	721K
2025-08-05	Stein Todd J	Director	Sell	0	$0.00	$0	606K
2025-08-05	Stein Todd J	Director	Sell	5K	$18.61	$84K	73K
2025-08-05	Rice Calvin	Chief Financial Officer & CAO	Sell	15K	$18.28	$269K	7K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

2 Form 144 notices on file for SPOK worth $334K at the prices reported; 1 in the last 90 days worth $226K. Latest: Woods-Keisling Sharon filed on 2026-08-10 to sell 20,000 shares ($226K) from 2026-08-10.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-08-10	Woods-Keisling SharonOfficer	20K	$226K	0.096%	2026-08-10	Charles Schwab Co., Inc.
2026-05-05	Woods-Keisling SharonOfficer	10K	$109K	0.048%	2026-05-05	Charles Schwab Corp.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

No holder on file reports 5% or more of SPOK in its latest filing.

Filed	Form	Holder	Shares	Of class	Event
2026-03-27	13G/Ano. 3	The Vanguard Groupinvestment adviser	0	0.0%	2026-03-13

13F holders

Tracked managers holding SPOK at their latest 13F. JSON

7 of the 30 tracked managers held SPOK at their latest 13F, $16.1M in total at quarter-end prices. Renaissance Technologies is the largest at $11.8M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 4 added shares and 3 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Renaissance Technologies	2026-06-30	1.1M	$11.8M	0.02%	-113K
Citadel Advisors	2026-06-30	183K	$1.9M	0.00%	+166K
D. E. Shaw & Co.	2026-06-30	130K	$1.3M	0.00%	+41K
AQR Capital Management	2026-06-30	45K	$461K	0.00%	+2K
Two Sigma Investments	2026-06-30	23K	$237K	0.00%	+3K
Millennium Management	2026-06-30	22K	$229K	0.00%	-15K
Point72 Asset Management	2026-06-30	19K	$196K	0.00%	-71K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) Spok Holdings reported revenue of $35.0M, down 1.9% from the same quarter a year earlier, and net income of $4.1M (0.20 diluted EPS). In FY 2025 it generated $28.9M of operating cash flow and spent $27.3M on dividends.

Cash: $16.6M
Equity: $139.9M
Total assets: $195.6M
Shares outstanding: 20,918,137

Quarterly, last 8 quarters

Quarter	Period end	Revenue	Net income	Margin	Diluted EPS
Q2 FY 2026	2026-06-30	$35.0M	$4.1M	11.8%	0.20
Q1 FY 2026	2026-03-31	$33.2M	$2.0M	6.0%	0.09
Q4 FY 2025derived	2025-12-31	$33.9M	$2.9M	8.7%	n/a
Q3 FY 2025	2025-09-30	$33.9M	$3.2M	9.5%	0.15
Q2 FY 2025	2025-06-30	$35.7M	$4.6M	12.8%	0.22
Q1 FY 2025	2025-03-31	$36.3M	$5.2M	14.3%	0.25
Q4 FY 2024derived	2024-12-31	$33.9M	$3.6M	10.8%	n/a
Q3 FY 2024	2024-09-30	$34.9M	$3.7M	10.5%	0.18

Fiscal years, with buybacks and dividends

Fiscal year	Ends	Revenue	Net income	Operating cash flow	Capex	Buybacks	Dividends
FY 2025	2025-12-31	$139.7M	$15.9M	$28.9M	$3.8M	n/a	$27.3M
FY 2024	2024-12-31	$137.7M	$15.0M	$28.9M	$3.2M	n/a	$26.4M
FY 2023	2023-12-31	$139.0M	$15.7M	$26.2M	$3.4M	n/a	$25.6M
FY 2022	2022-12-31	$134.5M	$21.9M	$6.5M	$3.8M	n/a	$25.0M
FY 2021	2021-12-31	$142.2M	-$22.2M	$8.0M	$4.4M	$0	$10.0M

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-24 from the cover page.

What this page is

Spok Holdings in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Spok Holdings (SPOK), SEC CIK 1289945, listed on Nasdaq, classified by the SEC as radiotelephone communications. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-28.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-18.JSON and CSV
Planned sales: SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-10.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-03-27.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials: SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-10-28.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-01.JSON and CSV
Company record: EDGAR filing index for CIK 1289945Ticker, name and exchange from the SEC's company list, refreshed weekly.
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How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as radiotelephone communications

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Datasets

Frequently Asked Questions

How much of SPOK is sold short?

655,518 shares were held short at the 2026-10-15 settlement, 5.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is SPOK's daily short volume?

On 2026-10-28, 49,023 of the 77,393 SPOK shares reported to FINRA were sold short, 63.3% of the day's reported volume. Short volume is a flow for one day, not a position.

Does SPOK have fails to deliver?

The SEC's latest file shows 136 SPOK shares failed to deliver at settlement 2026-09-18. Fails are reported per settlement date and published twice a month with a lag.

Are SPOK insiders buying or selling?

Insiders at SPOK reported 2 open-market sells worth $320K in the last 90 days and no open-market buys. Latest filing: Stein Todd J (Director) on 2026-10-01.

Have SPOK insiders filed to sell?

Who owns 5% or more of SPOK?

No holder on file reports 5% or more of SPOK in its latest filing.

What did SPOK report last quarter?

Which tracked 13F managers own SPOK?

7 of the 30 tracked 13F managers held SPOK shares at their latest filing, $16.1M in all. The largest: Renaissance Technologies (1.1M shares, $11.8M), Ken Griffin's Citadel Advisors (183K shares, $1.9M), D. E. Shaw & Co. (130K shares, $1.3M), Cliff Asness's AQR Capital Management (45K shares, $461K), Two Sigma Investments (23K shares, $237K), Izzy Englander's Millennium Management (22K shares, $229K). The table above lists all 7.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.