Comparable stake leader
Kevin P. Gilboy
SEC ownership of INNOVATIVE SOLUTIONS & SUPPORT INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000836690.
Disclosed value leader
Christopher Harborne
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- ISSC on Nasdaq
- Parsed ownership sources
- 13D/G, 3/4/5, and 13F
- Largest SEC-reported holder
- Kevin P. Gilboy
- Latest 13D/G holder
- Kevin P. Gilboy
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0000836690
- Issuer location
- Exton, PA
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 INNOVATIVE SOLUTIONS & SUPPORT INC (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
Kevin P. Gilboy
Disclosed value leader
Christopher Harborne
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
3/4/5
13F
Lead comparable stake: 3.8%
13D/G row: Kevin P. Gilboy
Showing 1-8 of 50 holder rows.
Quick read
Kevin P. Gilboy leads the comparable SEC ownership view at 3.8%.
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 Kevin P. Gilboy's linked filing trail.
Comparable ownership
Top 5
Kevin P. Gilboy
3.8%
Christopher Harborne
9.1%
MARSHALL WACE, LLP
4.3%
VANGUARD CAPITAL MANAGEMENT LLC
3.6%
MORGAN STANLEY
3.5%
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 |
|---|---|---|---|---|---|
| Kevin P. Gilboy |
13D/G
|
3.8%
|
$3,798,967
664,155 shares
|
$0 | 02 Dec 2024 |
| Christopher Harborne |
3/4/5
10%+ Owner
|
9.1%
|
$21,674,046
1,583,411 shares
|
-$8,306,665 | 27 Jun 2025 |
| MARSHALL WACE, LLP |
13F
Company
|
4.3%
|
$15,466,831
753,377 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.6%
|
$12,847,161
625,775 shares
|
— | 31 Mar 2026 |
| MORGAN STANLEY |
13F
Company
|
3.5%
|
$12,384,674
603,247 shares
|
— | 31 Mar 2026 |
| PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. |
13F
Company
|
3%
|
$10,647,228
518,618 shares
|
— | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
2.1%
|
$7,557,617
368,267 shares
|
— | 31 Mar 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
Company
|
2%
|
$7,146,555
348,103 shares
|
— | 31 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
Net insider flow leans to selling over the last 12 months. Net value: -$8,820,017.
Buys
$0
Insiders: 0
Sells
$8,820,017
Insiders: 1
Net
-$8,820,017
Shares: -688,728
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 688,728
| 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 | 688,728 | $0 | $8,820,017 | -$8,820,017 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-15 of 15 reporting-owner rows connected to INNOVATIVE SOLUTIONS & SUPPORT INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
15
Largest Forms 3/4/5 holder
Christopher Harborne
Net 12M change
-$8,306,665
Latest report
20 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Christopher Harborne | 10%+ Owner | $21,674,046 | -$8,306,665 | -28% | Filing P/S | 27 Jun 2025 |
| Shahram Askarpour | Chief Executive Officer | $13,068,834 | Mixed | 18 May 2026 | ||
| Of Geoffrey S. M. Hedrick Estate | 10%+ Owner | $12,964,373 | Mixed | 09 Aug 2023 | ||
| Glen R. Bressner | Director | $3,964,324 | Mixed | 20 May 2026 | ||
| Jeffrey DiGiovanni | Chief Financial Officer | $2,468,497 | Mixed | 18 May 2026 | ||
| Robert E. Mittelstaedt Jr. | Former Director | $973,054 | Mixed | 14 Jun 2022 | ||
| Roger A. Carolin | Director | $502,456 | Mixed | 16 Apr 2026 | ||
| Stephen L. Belland | Director | $183,652 | Mixed | 16 Apr 2026 | ||
| Parizad Olver | Director | $146,529 | Mixed | 13 Apr 2024 | ||
| Garry C. Dean | Director | $80,460 | Mixed | 16 Apr 2026 | ||
| Winston J. Churchill | Former Director | $74,724 | Mixed | 13 Jun 2023 | ||
| Denise L. Devine | Director | $53,208 | Mixed | 16 Apr 2026 | ||
| Michael Linacre | Chief Financial Officer | $47,724 | Mixed | 21 Aug 2023 | ||
| Relland M. Winand | Interim CFO | Mixed | 09 Nov 2023 | |||
| Richard A. Silfen | Director | Mixed | 16 Apr 2026 |
Recent insider transactions for INNOVATIVE SOLUTIONS & SUPPORT INC
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Glen R. Bressner | ISSC | Common Stock | Award | 4.28% | 6,300 | 153,655 | 20 May 2026 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Tax liability | -0.18% | -906 | 495,035 | 18 May 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -0.54% | -474 | 87,897 | 18 May 2026 | Direct | ||
| Denise L. Devine | ISSC | Restricted Stock Units | Award | 37.4% | 5,618 | 20,622 | 16 Apr 2026 | Direct | ||
| Denise L. Devine | ISSC | Restricted Stock Units | Disposed to Issuer | -26.5% | -5,403 | 15,004 | 16 Apr 2026 | Direct | ||
| Garry C. Dean | ISSC | Restricted Stock Units | Award | 23.6% | 5,618 | 29,408 | 16 Apr 2026 | Direct | ||
| Richard A. Silfen | ISSC | Restricted Stock Units | Award | 297.2% | 5,618 | 7,508 | 16 Apr 2026 | Direct | ||
| Roger Anthony Carolin | ISSC | Restricted Stock Units | Award | 7.24% | 5,618 | 83,188 | 16 Apr 2026 | Direct | ||
| Glen R. Bressner | ISSC | Restricted Stock Units | Award | 3.96% | 5,618 | 147,355 | 16 Apr 2026 | Direct | ||
| Stephen L. Belland | ISSC | Restricted Stock Units | Award | 15.2% | 5,618 | 42,559 | 16 Apr 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -0.86% | -765 | 88,371 | 08 Apr 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -1% | -897 | 89,136 | 31 Mar 2026 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Tax liability | -0.58% | -2,876 | 495,941 | 22 Feb 2026 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Tax liability | -0.72% | -3,625 | 498,817 | 18 Feb 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -2.36% | -2,172 | 90,033 | 18 Feb 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Restricted Stock units | Award | 11.4% | 9,455 | 92,205 | 17 Feb 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Performance Stock Units | Award | 21,307 | 21,307 | 17 Feb 2026 | Direct | |||
| Jeffrey DiGiovanni | ISSC | Non-Qualified Stock Option (Right to Buy) | Award | 16,108 | 16,108 | 17 Feb 2026 | Direct | |||
| Shahram Askarpour | ISSC | Restricted Stock Units | Award | 4.18% | 20,171 | 502,442 | 17 Feb 2026 | Direct | ||
| Shahram Askarpour | ISSC | Performance Stock Units | Award | 45,455 | 45,455 | 17 Feb 2026 | Direct | |||
| Shahram Askarpour | ISSC | Non-Qualified Stock Option (Right to Buy) | Award | 34,364 | 34,364 | 17 Feb 2026 | Direct | |||
| Richard A. Silfen | ISSC | Restricted Stock Units | Award | 1,890 | 1,890 | 17 Feb 2026 | Direct | |||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -1.04% | -868 | 82,750 | 13 Jan 2026 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Tax liability | -0.44% | -2,128 | 482,271 | 11 Jan 2026 | Direct | ||
| Jeffrey DiGiovanni | ISSC | Common Stock | Tax liability | -1.18% | -1,000 | 83,618 | 31 Dec 2025 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Tax liability | -15.4% | -87,918 | 484,399 | 20 Nov 2025 | Direct | ||
| Shahram Askarpour | ISSC | Common Stock | Options Exercise | 54.1% | 201,000 | 572,317 | 20 Nov 2025 | Direct | ||
| Shahram Askarpour | ISSC | Performance Stock Units | Options Exercise | -100% | -201,000 | 0 | 20 Nov 2025 | Direct | ||
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -8.39% | $1,984,912 | $13.69 | -145,009 | 1,583,411 | 30 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -4.03% | $991,605 | $13.68 | -72,499 | 1,728,420 | 27 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -3.21% | $788,213 | $13.21 | -59,667 | 1,800,919 | 26 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -4.65% | $1,171,417 | $12.92 | -90,655 | 1,860,586 | 25 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -4.38% | $1,117,246 | $12.50 | -89,414 | 1,951,241 | 23 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -1.54% | $391,424 | $12.25 | -31,953 | 2,040,655 | 20 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -0.82% | $211,117 | $12.28 | -17,198 | 2,072,608 | 18 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -1.03% | $278,536 | $12.77 | -21,809 | 2,089,806 | 17 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -0.24% | $60,217 | $11.77 | -5,116 | 2,111,615 | 11 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -0.02% | $5,146 | $11.75 | -438 | 2,116,731 | 10 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -2.92% | $749,247 | $11.78 | -63,592 | 2,117,169 | 09 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -1.6% | $416,739 | $11.76 | -35,437 | 2,180,761 | 06 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -0.54% | $140,844 | $11.79 | -11,944 | 2,216,198 | 05 Jun 2025 | See Footnote |
| Christopher Harborne | ISSC | Common Stock, par value $0.001 per share | Sale | -1.94% | $513,353 | $11.67 | -43,997 | 2,228,142 | 04 Jun 2025 | See Footnote |
* marks a reported price that did not pass the local price check.