XOOMAR

Spok Holdings, Inc (SPOK)

Every FINRA and SEC series the site collects for Spok Holdings, Inc: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as radiotelephone communications.

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587K

Short interest

settlement 2026-08-14

3.4

Days to cover

+1.6% vs prior

52.6%

Short share of volume

2026-09-11

463

Fails to deliver

settlement 2026-08-11

-$320K

Insider flow, 90 days

0 buys, 2 sells

As of 2026-09-11.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 14 August 2026, short interest in SPOK is 586,769 shares, up 26,567 shares over the last month. Over the last 48 readings it ranged from 131,206 shares (13 June 2025) to 586,769 shares (14 August 2026). The latest reading sits at the top of that range. At the reported average volume of 175K shares a day that is 3.4 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-14586,769+1.6%175,3513.35
2026-07-31577,280+3.0%141,1314.09
2026-07-15560,202+15.7%146,6683.82
2026-06-30484,020+5.5%241,8642.00
2026-06-15458,730-14.2%137,2593.34
2026-05-29534,481-3.3%172,6883.10
2026-05-15552,947+13.3%197,8182.80
2026-04-30487,949+7.2%150,3073.25
2026-04-15455,214-12.5%155,0962.94
2026-03-31520,296-2.4%175,6662.96
2026-03-13532,995-7.7%184,3742.89
2026-02-27577,687+26.3%266,3822.17
2026-02-13457,339+6.8%149,3653.06
2026-01-30428,096+30.4%166,9392.56
2026-01-15328,368+22.6%159,4492.06
2025-12-31267,833-15.4%167,1841.60
2025-12-15316,567-8.3%161,3051.96
2025-11-28345,238+37.3%189,0221.83
2025-11-14251,484-14.6%166,8621.51
2025-10-31294,487-6.0%166,3661.77
2025-10-15313,346-0.8%122,3322.56
2025-09-30315,728-2.2%83,6303.78
2025-09-15322,802-1.1%112,0062.88
2025-08-29326,572+22.6%141,6182.31

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 11 September 2026, the short share of SPOK volume is 52.6%, down 9.9 points over the last five sessions. Over the last 52 readings it ranged from 30.1% (13 July 2026) to 81.9% (17 August 2026). The latest reading is in line with the 30-session average of 52.4%, on 37K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-1119K37K52.6%0
2026-09-1043K62K68.4%0
2026-09-0941K53K78.3%0
2026-09-0821K41K52.3%0
2026-09-0425K31K80.0%0
2026-09-0322K35K62.6%0
2026-09-0221K32K67.4%0
2026-09-0127K46K58.4%0
2026-08-3117K52K32.6%12
2026-08-2820K45K45.1%0
2026-08-2731K55K56.7%3
2026-08-2615K35K43.2%0
2026-08-2524K69K34.4%0
2026-08-2429K59K49.0%0
2026-08-2133K87K37.7%10
2026-08-2032K87K36.6%0
2026-08-1936K84K43.4%197
2026-08-1864K91K70.2%7
2026-08-1795K116K81.9%105
2026-08-1424K80K30.3%0
2026-08-1327K51K51.6%50
2026-08-1240K62K64.2%0
2026-08-1127K59K45.5%0
2026-08-1022K65K33.4%56
2026-08-0715K38K40.0%49
2026-08-0635K67K52.4%0
2026-08-0565K115K56.5%0
2026-08-0432K85K37.5%2
2026-08-0330K80K37.3%200
2026-07-3134K46K72.7%0

Fails to deliver

SEC, by settlement date. JSON

As of 11 August 2026, the fails-to-deliver balance in SPOK is 463 shares, up 236 shares over the last settlement date. Over the last 26 readings it ranged from 4 shares (30 September 2025) to 2,514 shares (17 June 2026).

SettlementShares failedPriceValue
2026-08-11463$11.33$5K
2026-07-28227$10.81$2K
2026-06-172,514$10.48$26K
2026-04-30156$11.05$2K
2026-04-23244$11.32$3K
2026-04-22837$11.24$9K
2026-04-204$11.50$46
2026-04-10168$11.29$2K
2026-04-07175$11.10$2K
2026-04-01322$10.90$4K
2026-03-252,503$11.27$28K
2026-03-09117$12.54$1K
2026-03-06235$12.41$3K
2026-03-03563$12.11$7K
2026-03-02324$12.14$4K
2026-02-0529$13.50$392
2026-01-057$13.00$91
2025-12-10407$13.18$5K
2025-11-282,323$13.30$31K
2025-11-20796$12.56$10K
2025-11-18856$13.37$11K
2025-11-061,097$13.68$15K
2025-11-03743$14.29$11K
2025-10-09358$15.91$6K
2025-10-0733$15.82$522
2025-09-304$17.37$69

Insider trades

SEC Form 4, newest first, 50 of 86 shown. JSON

Insiders at SPOK reported 2 open-market sells worth $320K in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Woods-Keisling Sharon (Corporate Secretary, Treasurer) on 2026-08-10.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-08-10Woods-Keisling SharonCorporate Secretary, TreasurerSell20K$11.30$226K6K
2026-08-10COURNOYER CHRISTINEn/aSell8K$11.28$94K16K
2026-05-12KELLY VINCENT DPresident &amp; CEOBuy5K$10.70$53K168K
2026-05-11KELLY VINCENT DPresident &amp; CEOBuy5K$10.67$53K163K
2026-05-05Woods-Keisling SharonCorporate Secretary, TreasurerSell10K$11.00$110K26K
2026-04-14Rice CalvinChief Financial Officer &amp; CAOGrant0$0.00$021K
2026-04-01Stein Todd Jn/aGrant0$0.00$0498K
2026-04-01Stein Todd Jn/aGrant2K$10.90$25K48K
2026-04-01SHOCKLEY BRETT An/aGrant2K$10.90$25K38K
2026-04-01Hyun Randyn/aGrant2K$10.90$25K37K
2026-04-01COURNOYER CHRISTINEn/aGrant2K$10.90$25K22K
2026-04-01Byrne Barbara Petersonn/aGrant2K$10.90$25K44K
2026-03-04Woods-Keisling SharonCorporate Secretary, TreasurerTax withholding4K$12.14$54K36K
2026-03-04Woods-Keisling SharonCorporate Secretary, TreasurerGrant3K$12.14$42K41K
2026-03-04Woods-Keisling SharonCorporate Secretary, TreasurerOption exercise11K$12.14$139K37K
2026-03-04WALLACE MICHAEL WChief Operating OfficerTax withholding18K$12.14$217K74K
2026-03-04WALLACE MICHAEL WChief Operating OfficerGrant9K$12.14$111K92K
2026-03-04WALLACE MICHAEL WChief Operating OfficerOption exercise31K$12.14$371K83K
2026-03-04Rice CalvinChief Financial Officer &amp; CAOTax withholding9K$12.14$106K21K
2026-03-04Rice CalvinChief Financial Officer &amp; CAOGrant4K$12.14$50K30K
2026-03-04Rice CalvinChief Financial Officer &amp; CAOOption exercise14K$12.14$167K26K
2026-03-04KELLY VINCENT DPresident &amp; CEOTax withholding29K$12.14$348K158K
2026-03-04KELLY VINCENT DPresident &amp; CEOGrant15K$12.14$178K186K
2026-03-04KELLY VINCENT DPresident &amp; CEOOption exercise49K$12.14$593K172K
2026-01-05Woods-Keisling SharonCorporate Secretary, TreasurerTax withholding3K$13.19$41K26K
2026-01-05Woods-Keisling SharonCorporate Secretary, TreasurerOption exercise9K$13.19$115K29K
2026-01-05WALLACE MICHAEL WChief Operating OfficerTax withholding11K$13.19$145K52K
2026-01-05WALLACE MICHAEL WChief Operating OfficerOption exercise23K$13.19$302K63K
2026-01-05Rice CalvinChief Financial Officer &amp; CAOTax withholding6K$13.19$82K12K
2026-01-05Rice CalvinChief Financial Officer &amp; CAOOption exercise11K$13.19$151K18K
2026-01-05KELLY VINCENT DPresident &amp; CEOTax withholding18K$13.19$231K123K
2026-01-05KELLY VINCENT DPresident &amp; CEOOption exercise37K$13.19$494K140K
2026-01-02Stein Todd Jn/aGrant0$0.00$0498K
2026-01-02Stein Todd Jn/aGrant2K$13.19$25K46K
2026-01-02SHOCKLEY BRETT An/aGrant2K$13.19$25K36K
2026-01-02Hyun Randyn/aGrant2K$13.19$25K34K
2026-01-02COURNOYER CHRISTINEn/aGrant2K$13.19$25K20K
2026-01-02Byrne Barbara Petersonn/aGrant2K$13.19$25K42K
2025-10-01Stein Todd Jn/aGrant0$0.00$0498K
2025-10-01Stein Todd Jn/aGrant1K$17.25$25K44K
2025-10-01SHOCKLEY BRETT An/aGrant1K$17.25$25K34K
2025-10-01Hyun Randyn/aGrant1K$17.25$25K32K
2025-10-01COURNOYER CHRISTINEn/aGrant1K$17.25$25K18K
2025-10-01Byrne Barbara Petersonn/aGrant1K$17.25$25K40K
2025-09-04Stein Todd Jn/aSell0$0.00$043K
2025-09-04Stein Todd Jn/aSell21K$18.08$371K567K
2025-09-04Stein Todd Jn/aSell17K$18.08$316K498K
2025-09-03Stein Todd Jn/aSell0$0.00$043K
2025-09-03Stein Todd Jn/aSell25K$18.02$459K587K
2025-09-03Stein Todd Jn/aSell18K$18.02$322K515K

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 the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

1 Form 144 notice on file for SPOK worth $226K 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.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-08-10Woods-Keisling SharonOfficer20K$226K0.096%2026-08-10Charles Schwab Co., Inc.

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.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-301.1M$11.8M0.02%-113K
Citadel Advisors2026-06-30183K$1.9M0.00%+166K
D. E. Shaw & Co.2026-06-30130K$1.3M0.00%+41K
AQR Capital Management2026-06-3045K$461K0.00%+2K
Two Sigma Investments2026-06-3023K$237K0.00%+3K
Millennium Management2026-06-3022K$229K0.00%-103K
Point72 Asset Management2026-06-3019K$196K0.00%-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 2026 (quarter ended 2026-06-30) Spok Holdings, Inc 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

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$35.0M$4.1M11.8%0.20
Q1 20262026-03-31$33.2M$2.0M6.0%0.09
Q4 2025derived2025-12-31$33.9Mn/an/an/a
Q3 20252025-09-30$33.9M$3.2M9.5%0.15
Q2 20252025-06-30$35.7M$4.6M12.8%0.22
Q1 20252025-03-31$36.3M$5.2M14.3%0.25
Q4 2024derived2024-12-31$33.9Mn/an/an/a
Q3 20242024-09-30$34.9M$3.7M10.5%0.18

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$139.7Mn/a$28.9M$3.8Mn/a$27.3M
FY 20242024-12-31$137.7Mn/a$28.9M$3.2Mn/a$26.4M
FY 20232023-12-31$139.0Mn/a$26.2M$3.4Mn/a$25.6M
FY 20222022-12-31$134.5Mn/a$6.5M$3.8Mn/a$25.0M
FY 20212021-12-31$142.2Mn/a$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 cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. 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, Inc 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 pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, 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 summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows Spok Holdings, Inc (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 method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-14.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-11.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-11.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-08-10.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-08-10.JSON and CSV
Company record
EDGAR filing index for CIK 1289945Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 13 Sep 05:40 UTC.

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 crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short 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

Datasets

Frequently Asked Questions

How much of SPOK is sold short?
586,769 shares were held short at the 2026-08-14 settlement, 3.4 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 2026-09-11, 19,485 of the 37,011 SPOK shares reported to FINRA were sold short, 52.6% 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 463 SPOK shares failed to deliver at settlement 2026-08-11. 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. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Woods-Keisling Sharon (Corporate Secretary, Treasurer) on 2026-08-10.
Have SPOK insiders filed to sell?
1 Form 144 notice on file for SPOK worth $226K 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.
What did SPOK report last quarter?
In Q2 2026 (quarter ended 2026-06-30) Spok Holdings, Inc 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.
Which funds hold SPOK?
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.

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