Comparable stake leader
Magnetar Financial LLC
SEC ownership of COMTECH TELECOMMUNICATIONS CORP /DE/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000023197.
Disclosed value leader
Magnetar Financial LLC
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- CMTL on Nasdaq
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- Magnetar Financial LLC
- Latest 13D/G holder
- Magnetar Financial LLC
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0000023197
- Issuer location
- Chandler, AZ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of COMTECH TELECOMMUNICATIONS CORP /DE/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Magnetar Financial LLC
Disclosed value leader
Magnetar Financial LLC
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 42%
13D/G row: Magnetar Financial LLC
Showing 1-8 of 50 holder rows.
Quick read
Magnetar Financial LLC leads the comparable SEC ownership view at 42%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Magnetar Financial LLC's linked filing trail.
Comparable ownership
Top 5
Magnetar Financial LLC
42%
White Hat Capital Partners LP
10%
QVT Financial LP
5.7%
ROYCE & ASSOCIATES LP
5.4%
NEEDHAM INVESTMENT MANAGEMENT LLC
4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Magnetar Financial LLC |
13D/G
|
42%
|
$51,367,322
20,955,990 shares
|
+$1,479,463 | 21 Jul 2025 |
| White Hat Capital Partners LP |
13D/G
Mark R. Quinlan
|
10%
|
$11,783,186
4,807,109 shares
|
+$310,991 | 21 Jul 2025 |
| QVT Financial LP |
13D/G
13F
Company
|
5.7%
|
$5,625,630
1,694,467 shares
|
$0 | 31 Mar 2026 |
| ROYCE & ASSOCIATES LP |
13F
13D/G
Company
|
5.4%
from 13D/G
|
$5,697,445
1,716,098 shares
|
— | 31 Mar 2026 |
| NEEDHAM INVESTMENT MANAGEMENT LLC |
13D/G
13F
NEEDHAM INVESTMENT MANAGEMENT L.L.C. · Company
|
4%
|
$6,212,047
1,174,300 shares
|
-$3,204,153 | 31 Dec 2025 |
| Michael Hildebrandt |
3/4/5
Director
|
0.25%
|
$390,592
73,836 shares
|
— | 24 Mar 2026 |
| Lloyd A. Sprung |
3/4/5
Director
|
0.12%
|
$193,719
36,620 shares
|
— | 24 Mar 2026 |
| Mary Jane Raymond |
3/4/5
Director
|
0.12%
|
$193,719
36,620 shares
|
— | 24 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 07 Jun 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to COMTECH TELECOMMUNICATIONS CORP /DE/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
Fred Kornberg
Net 12M change
$0
Latest report
03 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Fred Kornberg | Director | $4,528,242 | Mixed | 03 Dec 2022 | ||
| Michael D. Porcelain | Former President & CEO | $1,822,839 | Mixed | 09 Aug 2022 | ||
| Ken A. Peterman | Chairman, President and CEO, Director | $1,615,502 | Mixed | 12 Sep 2023 | ||
| Kenneth Traub | Chairman, President and CEO, Director | $679,109 | Mixed | 23 Jan 2026 | ||
| John Ratigan | President and CEO, Director | $619,451 | Mixed | 28 Oct 2024 | ||
| Michael Bondi | Chief Financial Officer | $610,722 | Mixed | 07 Nov 2025 | ||
| Nancy M. Stallone | Exec VP Treasurer & Asst Sec. | $534,902 | Mixed | 12 Aug 2024 | ||
| Jeffery Paul Robertson | President, Allerium Segment | $513,273 | Mixed | 03 Jun 2026 | ||
| Donald E. Walther | Chief Legal Officer | $396,568 | Mixed | 28 Apr 2026 | ||
| Michael Hildebrandt | Director | $390,592 | Mixed | 24 Mar 2026 | ||
| Lisa /adv Lesavoy | Director | $355,128 | Mixed | 11 Aug 2023 | ||
| Maria Hedden | Chief Operating Officer | $296,877 | Mixed | 12 Aug 2024 | ||
| Crawford Bruce T. | Director | $282,410 | Mixed | 24 Mar 2026 | ||
| Daniel Gizinski | President, S&S Comm. Segment | $252,671 | Mixed | 04 Feb 2026 | ||
| Mary Jane Raymond | Director | $193,719 | Mixed | 24 Mar 2026 | ||
| Lloyd A. Sprung | Director | $193,719 | Mixed | 24 Mar 2026 | ||
| Lawrence Waldman | Director | $138,076 | Mixed | 24 Mar 2026 | ||
| Yacov A. Shamash | Director | $137,526 | Mixed | 30 Sep 2024 | ||
| Ellen M. Lord | Director | $133,785 | Mixed | 11 Aug 2023 | ||
| Judy Chambers | Director | $115,112 | Mixed | 30 Sep 2024 |
Recent insider transactions for COMTECH TELECOMMUNICATIONS CORP /DE/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -23.1% | -19,798 | 65,957 | 03 Jun 2026 | Direct | ||
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 83.1% | 38,910 | 85,755 | 03 Jun 2026 | Direct | ||
| Jeffery Paul Robertson | CMTL | Restricted Stock Units | Options Exercise | -19.2% | -38,910 | 163,703 | 03 Jun 2026 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -19.4% | -10,475 | 43,555 | 28 Apr 2026 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Options Exercise | 73.2% | 30,671 | 72,541 | 28 Apr 2026 | Direct | ||
| Donald E. Walther | CMTL | Restricted Stock Units | Options Exercise | -17.5% | -30,671 | 144,683 | 28 Apr 2026 | Direct | ||
| Bruce T. Crawford | CMTL | Common Stock Par Value $0.10 Per Share | Award | 36,620 | 36,620 | 24 Mar 2026 | Direct | |||
| Michael Hildebrandt | CMTL | Common Stock Par Value $0.10 Per Share | Award | 98.4% | 36,620 | 73,836 | 24 Mar 2026 | Direct | ||
| Mary J. Raymond | CMTL | Common Stock Par Value $0.10 Per Share | Award | 36,620 | 36,620 | 24 Mar 2026 | Direct | |||
| Lloyd A. Sprung | CMTL | Common Stock Par Value $0.10 Per Share | Award | 36,620 | 36,620 | 24 Mar 2026 | Direct | |||
| Lawrence Waldman | CMTL | Restricted Stock Units | Award | 54.4% | 36,620 | 103,974 | 24 Mar 2026 | Direct | ||
| Mark R. Quinlan | CMTL | Restricted Stock Units | Award | 67% | 36,620 | 91,275 | 24 Mar 2026 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -1.45% | -460 | 31,240 | 04 Feb 2026 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 3.32% | 1,019 | 31,700 | 04 Feb 2026 | Direct | ||
| Daniel Gizinski | CMTL | Restricted Stock Units | Options Exercise | -0.7% | -1,019 | 145,435 | 04 Feb 2026 | Direct | ||
| Kenneth Traub | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -27.7% | -22,439 | 58,440 | 23 Jan 2026 | Direct | ||
| Kenneth Traub | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 208.3% | 54,645 | 80,879 | 23 Jan 2026 | Direct | ||
| Kenneth Traub | CMTL | Restricted Stock Units | Options Exercise | -11.6% | -54,645 | 416,308 | 23 Jan 2026 | Direct | ||
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -4.62% | -2,268 | 46,845 | 10 Jan 2026 | Direct | ||
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 8.95% | 4,036 | 49,113 | 10 Jan 2026 | Direct | ||
| Jeffery Paul Robertson | CMTL | Restricted Stock Units | Options Exercise | -1.95% | -4,036 | 202,613 | 10 Jan 2026 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -1.73% | -539 | 30,681 | 07 Nov 2025 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Award | 3.97% | 1,193 | 31,220 | 07 Nov 2025 | Direct | ||
| Daniel Gizinski | CMTL | Restricted Stock Units | Award | 438.2% | 119,243 | 146,454 | 07 Nov 2025 | Direct | ||
| Jeffery Paul Robertson | CMTL | Restricted Stock Units | Award | 107.2% | 106,908 | 206,649 | 07 Nov 2025 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -2% | -868 | 42,446 | 07 Nov 2025 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Award | 6.4% | 2,605 | 43,314 | 07 Nov 2025 | Direct | ||
| Donald E. Walther | CMTL | Restricted Stock Units | Award | 156.2% | 106,908 | 175,354 | 07 Nov 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -1.74% | -2,561 | 144,958 | 07 Nov 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Award | 3.52% | 5,015 | 147,519 | 07 Nov 2025 | Direct | ||
| Michael Bondi | CMTL | Restricted Stock Units | Award | 314.8% | 148,026 | 195,054 | 07 Nov 2025 | Direct | ||
| Kenneth Traub | CMTL | Restricted Stock Units | Award | 187.3% | 307,018 | 470,953 | 07 Nov 2025 | Direct | ||
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -5.24% | -2,492 | 45,077 | 30 Sep 2025 | Direct | ||
| Jeffery Paul Robertson | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 11.5% | 4,907 | 47,569 | 30 Sep 2025 | Direct | ||
| Jeffery Paul Robertson | CMTL | Restricted Stock Units | Options Exercise | -4.69% | -4,907 | 99,741 | 30 Sep 2025 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -11.5% | -5,311 | 40,709 | 30 Sep 2025 | Direct | ||
| Donald E. Walther | CMTL | Common Stock Par Value $.10 Per Share | Options Exercise | 53% | 15,946 | 46,020 | 30 Sep 2025 | Direct | ||
| Donald E. Walther | CMTL | Restricted Stock Units | Options Exercise | -18.9% | -15,946 | 68,446 | 30 Sep 2025 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -11.8% | -4,011 | 30,027 | 30 Sep 2025 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 35.4% | 8,893 | 34,038 | 30 Sep 2025 | Direct | ||
| Daniel Gizinski | CMTL | Restricted Stock Units | Options Exercise | -24.6% | -8,893 | 27,211 | 30 Sep 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -5.98% | -9,064 | 142,504 | 30 Sep 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Options Exercise | 13.3% | 17,755 | 151,568 | 30 Sep 2025 | Direct | ||
| Michael Bondi | CMTL | Restricted Stock Units | Options Exercise | -27.4% | -17,755 | 47,028 | 30 Sep 2025 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Tax liability | -2.41% | -620 | 25,145 | 12 Aug 2025 | Direct | ||
| Daniel Gizinski | CMTL | Common Stock Par Value $0.10 Per Share | Options Exercise | 5.63% | 1,374 | 25,765 | 12 Aug 2025 | Direct | ||
| Daniel Gizinski | CMTL | Restricted Stock Units | Options Exercise | -3.67% | -1,374 | 36,104 | 12 Aug 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Tax liability | -1.81% | -2,472 | 133,813 | 12 Aug 2025 | Direct | ||
| Michael Bondi | CMTL | Common Stock Par Value $.10 Per Share | Options Exercise | 3.68% | 4,842 | 136,285 | 12 Aug 2025 | Direct | ||
| Michael Bondi | CMTL | Restricted Stock Units | Options Exercise | -6.95% | -4,842 | 64,783 | 12 Aug 2025 | Direct |
* marks a reported price that did not pass the local price check.