XOOMAR

Comtech Telecommunications (CMTL)

Comtech Telecommunications on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as radio & tv broadcasting & communications equipment.

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334K

Short interest

settlement 2026-09-30

1.6

Days to cover

+0.4 days vs prior

45.1%

Short share of volume

2026-10-09

865

Fails to deliver

settlement 2026-09-04

Thu 10 Dec

Next earnings

estimated date

$0

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in CMTL is 333,833 shares, down 70,033 shares over the last month. Over the last 48 readings it ranged from 224,681 shares (15 June 2026) to 1,914,334 shares (31 March 2025). The latest reading sits at the bottom of that range. At the reported average volume of 204K shares a day that is 1.6 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-30333,833-21.8%203,6051.64
2026-09-15426,623+5.6%332,0841.28
2026-08-31403,866-28.6%307,6321.31
2026-08-14565,640+5.5%358,1731.58
2026-07-31536,377+44.2%348,1191.54
2026-07-15372,019-12.0%523,8591.00
2026-06-30422,928+88.2%1,396,5581.00
2026-06-15224,681-35.1%780,9681.00
2026-05-29346,164+13.3%420,1101.00
2026-05-15305,497-36.5%177,0051.73
2026-04-30480,769-20.7%187,3242.57
2026-04-15606,152-2.5%211,6352.86
2026-03-31621,365+17.4%436,5361.42
2026-03-13529,403-25.9%189,5552.79
2026-02-27714,179-4.5%235,4693.03
2026-02-13747,992-10.0%308,2202.43
2026-01-30831,289+8.0%308,5072.69
2026-01-15769,583-13.4%451,9201.70
2025-12-31888,914+5.0%511,0581.74
2025-12-15846,353-12.5%246,5823.43
2025-11-28967,138-3.8%140,3496.89
2025-11-141,005,571-4.7%420,7392.39
2025-10-311,055,513-6.2%209,8455.03
2025-10-151,124,830-5.1%183,4706.13

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of CMTL volume is 45.1%, down 23.5 points over the last five sessions. Over the last 30 readings it ranged from 36.8% (10 September 2026) to 73.3% (25 September 2026). The latest reading is 6.4 points below the 30-session average of 51.6%, on 73K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-0933K73K45.1%0
2026-10-08111K234K47.5%7,500
2026-10-07128K190K67.5%541
2026-10-0666K139K47.5%0
2026-10-05144K273K52.6%1,702
2026-10-0263K91K68.6%200
2026-10-01119K207K57.3%6,209
2026-09-3016K29K55.7%0
2026-09-2927K44K61.9%0
2026-09-2838K62K61.9%0
2026-09-2537K50K73.3%0
2026-09-24150K246K61.1%106
2026-09-2348K72K66.7%120
2026-09-2256K119K46.9%0
2026-09-2196K216K44.4%0
2026-09-1855K94K58.0%2,277
2026-09-1727K69K39.4%0
2026-09-1669K128K53.5%1,243
2026-09-1559K120K48.8%0
2026-09-1478K178K44.1%1,307
2026-09-1174K188K39.6%0
2026-09-1079K214K36.8%457
2026-09-0972K168K43.0%0
2026-09-0871K131K53.8%1,100
2026-09-0472K194K37.3%1
2026-09-03108K265K40.6%1,055
2026-09-02155K292K53.1%800
2026-09-0194K193K48.4%600
2026-08-3161K116K52.9%0
2026-08-28132K333K39.6%2,800

Fails to deliver

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

As of 4 September 2026, the fails-to-deliver balance in CMTL is 865 shares, up 858 shares over the last settlement date. Over the last 30 readings it ranged from 5 shares (14 August 2026) to 90,162 shares (4 February 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-04865$1.53$1K
2026-08-317$1.70$12
2026-08-216,128$1.74$11K
2026-08-145$1.76$9
2026-08-112,774$1.72$5K
2026-08-054,734$1.69$8K
2026-08-031,517$1.68$3K
2026-07-17202$1.66$335
2026-07-0223,678$2.11$50K
2026-06-26147$2.05$301
2026-06-25722$2.35$2K
2026-06-17609$2.99$2K
2026-06-16419$2.76$1K
2026-06-1553$4.83$256
2026-06-011,409$5.62$8K
2026-05-28310$5.18$2K
2026-03-31683$3.01$2K
2026-03-2627$3.62$98
2026-02-0490,162$5.98$539K
2025-12-2236,115$3.35$121K
2025-12-052,832$3.29$9K
2025-10-142,710$3.09$8K
2025-09-1710,786$2.44$26K
2025-09-15200$2.35$470
2025-07-164,250$2.46$10K
2025-07-107,192$2.83$20K
2025-07-092,537$2.52$6K
2025-07-02170$2.34$398
2025-06-27879$2.40$2K
2025-06-252,950$2.61$8K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for CMTL in the last 90 days. The most recent filings are listed below. Latest filing: Robertson Jeffery Paul (President, Allerium Segment) on 2026-09-30.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-30Robertson Jeffery PaulPresident, Allerium SegmentTax withholding2K$1.37$3K68K
2026-09-30Robertson Jeffery PaulPresident, Allerium SegmentOption exercise5Kprice not stated in the filingnot stated71K
2026-09-30Walther Donald E.Chief Legal OfficerTax withholding5K$1.37$7K77K
2026-09-30Walther Donald E.Chief Legal OfficerOption exercise16Kprice not stated in the filingnot stated82K
2026-09-30BONDI MICHAELChief Financial OfficerTax withholding9K$1.37$12K159K
2026-09-30BONDI MICHAELChief Financial OfficerOption exercise18Kprice not stated in the filingnot stated168K
2026-09-30Gizinski DanielPresident, S&S Comm. SegmentTax withholding4K$1.37$5K39K
2026-09-30Gizinski DanielPresident, S&S Comm. SegmentOption exercise9Kprice not stated in the filingnot stated43K
2026-08-11Walther Donald E.Chief Legal OfficerTax withholding2K$1.73$3K67K
2026-08-11Walther Donald E.Chief Legal OfficerOption exercise6Kprice not stated in the filingnot stated69K
2026-08-11BONDI MICHAELChief Financial OfficerTax withholding5K$1.73$9K151K
2026-08-11BONDI MICHAELChief Financial OfficerOption exercise10Kprice not stated in the filingnot stated156K
2026-08-11Gizinski DanielPresident, S&S Comm. SegmentTax withholding885$1.73$2K34K
2026-08-11Gizinski DanielPresident, S&S Comm. SegmentOption exercise2Kprice not stated in the filingnot stated35K
2026-08-10BONDI MICHAELChief Financial OfficerTax withholding611$1.72$1K146K
2026-08-10BONDI MICHAELChief Financial OfficerOption exercise1Kprice not stated in the filingnot stated146K
2026-08-10Gizinski DanielPresident, S&S Comm. SegmentTax withholding127$1.72$21833K
2026-08-10Gizinski DanielPresident, S&S Comm. SegmentOption exercise280price not stated in the filingnot stated33K
2026-07-31Gizinski DanielPresident, S&S Comm. SegmentTax withholding1K$1.68$2K32K
2026-07-31Gizinski DanielPresident, S&S Comm. SegmentOption exercise3Kprice not stated in the filingnot stated34K
2026-06-18Gizinski DanielPresident, S&S Comm. SegmentSell200$2.60$52031K
2026-06-03Robertson Jeffery PaulPresident, Allerium SegmentTax withholding20K$5.64$112K66K
2026-06-03Robertson Jeffery PaulPresident, Allerium SegmentOption exercise39Kprice not stated in the filingnot stated86K
2026-04-28Walther Donald E.Chief Legal OfficerOption exercise29Kprice not stated in the filingnot stated73K
2026-04-28Walther Donald E.Chief Legal OfficerTax withholding10K$3.52$35K63K
2026-04-28Walther Donald E.Chief Legal OfficerTax withholding576$3.52$2K44K
2026-04-28Walther Donald E.Chief Legal OfficerOption exercise2Kprice not stated in the filingnot stated44K
2026-03-24Sprung Lloyd A.DirectorGrant37K$0.00$037K
2026-03-24Hildebrandt MichaelDirectorGrant37K$0.00$074K
2026-03-24Crawford Bruce TDirectorGrant37K$0.00$037K
2026-03-24RAYMOND MARY JANEDirectorGrant37K$0.00$037K
2026-02-04Gizinski DanielPresident, S&S Comm. SegmentOption exercise1Kprice not stated in the filingnot stated32K
2026-02-04Gizinski DanielPresident, S&S Comm. SegmentTax withholding460$5.29$2K31K
2026-01-23Traub KennethChairman, President and CEOOption exercise55Kprice not stated in the filingnot stated81K
2026-01-23Traub KennethChairman, President and CEOTax withholding22K$5.87$132K58K
2026-01-10Robertson Jeffery PaulPresident, Allerium SegmentTax withholding2K$5.47$12K47K
2026-01-10Robertson Jeffery PaulPresident, Allerium SegmentOption exercise4Kprice not stated in the filingnot stated49K
2025-11-07Gizinski DanielPresident, S&S Comm. SegmentTax withholding539$3.04$2K31K
2025-11-07Gizinski DanielPresident, S&S Comm. SegmentGrant1Kprice not stated in the filingnot stated31K
2025-11-07Walther Donald E.Chief Legal OfficerTax withholding868$3.04$3K42K
2025-11-07Walther Donald E.Chief Legal OfficerGrant3Kprice not stated in the filingnot stated43K
2025-11-07BONDI MICHAELChief Financial OfficerGrant5Kprice not stated in the filingnot stated148K
2025-11-07BONDI MICHAELChief Financial OfficerTax withholding3K$3.04$8K145K
2025-09-30BONDI MICHAELChief Financial OfficerTax withholding9K$2.58$23K143K
2025-09-30BONDI MICHAELChief Financial OfficerOption exercise18Kprice not stated in the filingnot stated152K
2025-09-30Gizinski DanielPresident, S&S Comm. SegmentTax withholding4K$2.58$10K30K
2025-09-30Gizinski DanielPresident, S&S Comm. SegmentOption exercise9Kprice not stated in the filingnot stated34K
2025-09-30Walther Donald E.Chief Legal OfficerOption exercise16Kprice not stated in the filingnot stated46K
2025-09-30Walther Donald E.Chief Legal OfficerTax withholding5K$2.58$14K41K
2025-09-30Robertson Jeffery PaulPresident, T&W SegmentTax withholding2K$2.58$6K45K

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.

Large holders (13D and 13G)

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

11 holders report 5% or more of CMTL in their latest filing, 9 on Schedule 13D (active intent). The largest reported stake is Supernova Management LLC at 42.8% of the class (22,402,628 shares), filed 2026-06-17 for an event on 2026-06-14.

FiledFormHolderSharesOf classEvent
2026-07-3113GVanguard Capital Managementinvestment adviser1.5M5.0%2026-06-30
2026-07-2813G/Ano. 1ROYCE & ASSOCIATES LPinvestment adviser163K0.5%2026-06-30
2026-06-1713D/Ano. 9Supernova Management LLCparent holding company, other entity22.4M42.8%2026-06-14
2026-06-1713D/Ano. 9Magnetar Capital Partners LPparent holding company, other entity22.4M42.8%2026-06-14
2026-06-1713D/Ano. 9Magnetar Financial LLCinvestment adviser, other entity22.4M42.8%2026-06-14
2026-06-1713D/Ano. 9David J. Snydermanindividual, parent holding company22.4M42.8%2026-06-14
2026-06-1613D/Ano. 5Mark R. Quinlanindividual5.1M10.0%2026-06-14
2026-06-1613D/Ano. 5David J. Chanleyindividual5.1M10.0%2026-06-14
2026-06-1613D/Ano. 5White Hat Capital Partners LPpartnership5.1M10.0%2026-06-14
2026-06-1613D/Ano. 5White Hat SP GP LLCother entity4.0M10.0%2026-06-14
2026-06-1613D/Ano. 5White Hat Strategic Partners LPpartnership4.0M10.0%2026-06-14
2026-06-1613D/Ano. 5White Hat SP GP II LLCother entity1.1M3.5%2026-06-14
2026-06-1613D/Ano. 5White Hat Strategic Partners II LPpartnership1.1M3.5%2026-06-14
2026-05-1513GQVT Financial LPpartnership1.7M5.7%2026-03-31
2026-02-1313G/Ano. 2NEEDHAM INVESTMENT MANAGEMENT L.L.C.investment adviser, other entity1.2M4.0%2025-12-31
2026-02-1313G/Ano. 2NEEDHAM ASSET MANAGEMENT, LLCparent holding company, other entity1.2M4.0%2025-12-31
2026-02-1313G/Ano. 2GEORGE A. NEEDHAMparent holding company, individual1.2M4.0%2025-12-31
2026-02-1313G/Ano. 2NEEDHAM AGGRESSIVE GROWTH FUNDinvestment company, other entity1.0M3.4%2025-12-31

13F holders

Tracked managers holding CMTL at their latest 13F. JSON

5 of the 30 tracked managers held CMTL at their latest 13F, $1.4M in total at quarter-end prices. Renaissance Technologies is the largest at $698K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 4 cut.

FundQuarterSharesValueOf portfolioChange in shares
Renaissance Technologies2026-06-30333K$698K0.00%+97K
Two Sigma Investments2026-06-30156K$328K0.00%-220K
Millennium Management2026-06-30102K$214K0.00%-107K
Citadel Advisors2026-06-3052K$109K0.00%-221K
Point72 Asset Management2026-06-3018K$38K0.00%-15K

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 Q3 FY 2026 (quarter ended 2026-04-30) Comtech Telecommunications reported revenue of $106.0M, down 16.4% from the same quarter a year earlier, and net loss of $3.5M (-0.47 diluted EPS). In FY 2025 it generated -$8.3M of operating cash flow and spent $158K on dividends. As of 2026-04-30, cash was $28.5M against $104.2M of debt.

Cash
$28.5M
Debt
$104.2M
Equity
$52.5M
Total assets
$693.5M
Shares outstanding
29,961,431

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q3 FY 20262026-04-30$106.0M-$3.5M-3.3%-0.47
Q2 FY 20262026-01-31$106.8M-$13.6M-12.8%-0.68
Q1 FY 20262025-10-31$111.0M-$15.9M-14.3%-0.67
Q4 FY 2025derived2025-07-31$130.4M$7.9M6.1%n/a
Q3 FY 20252025-04-30$126.8M$33.9M26.8%-0.49
Q2 FY 20252025-01-31$126.6M-$48.7M-38.5%-0.76
Q1 FY 20252024-10-31$115.8M-$148.4M-128.2%-5.29
Q4 FY 2024derived2024-07-31$126.2M-$90.8M-71.9%n/a

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-07-31$499.5M-$155.3M-$8.3M$8.6Mn/a$158K
FY 20242024-07-31$540.4M-$100.0M-$54.5M$13.1Mn/a$268K
FY 20232023-07-31$550.0M-$26.9M-$4.4M$18.3Mn/a$8.7M
FY 20222022-07-31$486.2M-$33.1Mn/a$19.6Mn/a$11.0M
FY 20212021-07-31$581.7M-$73.5Mn/a$16.0Mn/a$10.3M

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 2026-04-30; shares outstanding as of 2026-06-11 from the cover page.

What this page is

Comtech Telecommunications 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 Comtech Telecommunications (CMTL), SEC CIK 23197, listed on Nasdaq, classified by the SEC as radio & tv broadcasting & communications equipment. 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 2026-09-30.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-04.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 2026-07-31.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 2026-04-30.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 2026-06-15.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 2026-09-30.JSON and CSV
Company record
EDGAR filing index for CIK 23197Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
10 requests a minute without a key, 30 with a free key from a free account.

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.

Datasets

Frequently Asked Questions

How much of CMTL is sold short?
333,833 shares were held short at the 2026-09-30 settlement, 1.6 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 CMTL's daily short volume?
On 2026-10-09, 32,988 of the 73,115 CMTL shares reported to FINRA were sold short, 45.1% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CMTL have fails to deliver?
The SEC's latest file shows 865 CMTL shares failed to deliver at settlement 2026-09-04. Fails are reported per settlement date and published twice a month with a lag.
Are CMTL insiders buying or selling?
No open-market insider trades were reported for CMTL in the last 90 days. The most recent filings are listed below. Latest filing: Robertson Jeffery Paul (President, Allerium Segment) on 2026-09-30.
Who owns 5% or more of CMTL?
11 holders report 5% or more of CMTL in their latest filing, 9 on Schedule 13D (active intent). The largest reported stake is Supernova Management LLC at 42.8% of the class (22,402,628 shares), filed 2026-06-17 for an event on 2026-06-14.
What did CMTL report last quarter?
In Q3 FY 2026 (quarter ended 2026-04-30) Comtech Telecommunications reported revenue of $106.0M, down 16.4% from the same quarter a year earlier, and net loss of $3.5M (-0.47 diluted EPS). In FY 2025 it generated -$8.3M of operating cash flow and spent $158K on dividends. As of 2026-04-30, cash was $28.5M against $104.2M of debt.
Which tracked 13F managers own CMTL?
5 of the 30 tracked 13F managers held CMTL shares at their latest filing, $1.4M in all. The largest: Renaissance Technologies (333K shares, $698K), Two Sigma Investments (156K shares, $328K), Izzy Englander's Millennium Management (102K shares, $214K), Ken Griffin's Citadel Advisors (52K shares, $109K), Steve Cohen's Point72 Asset Management (18K shares, $38K).

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