Comparable stake leader
VANGUARD PORTFOLIO MANAGEMENT LLC
SEC ownership of HARMONIC INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000851310.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- HLIT on Nasdaq
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD PORTFOLIO MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000851310
- Issuer location
- San Jose, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of HARMONIC 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
VANGUARD PORTFOLIO MANAGE...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 5.6%
13D/G row: VANGUARD PORTFOLIO MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD PORTFOLIO MANAGEMENT LLC leads the comparable SEC ownership view at 5.6%.
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 VANGUARD PORTFOLIO MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD PORTFOLIO MANAGEMENT LLC
5.6%
VANGUARD CAPITAL MANAGEMENT LLC
5%
Invesco Ltd.
3.9%
BlackRock, Inc.
17%
STATE STREET CORP
4.4%
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 |
|---|---|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.6%
|
$55,901,694
6,225,133 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5%
|
$49,545,282
5,517,292 shares
|
$0 | 31 Mar 2026 |
| Invesco Ltd. |
13D/G
13F
Company
|
3.9%
|
$40,844,698
4,444,472 shares
|
-$30,733,584 | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
17%
|
$172,103,937
19,165,249 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4.4%
|
$43,651,349
4,860,952 shares
|
— | 31 Mar 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
3.3%
|
$32,986,621
3,673,398 shares
|
— | 31 Mar 2026 |
| Trigran Investments, Inc. |
13F
Company
|
2.9%
|
$28,887,178
3,216,835 shares
|
— | 31 Mar 2026 |
| D. E. Shaw & Co., Inc. |
13F
Company
|
2.8%
|
$27,855,026
3,101,896 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: -$275,889.
Buys
$515,544
Insiders: 2
Sells
$791,433
Insiders: 2
Net
-$275,889
Shares: -16,538
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 49,528
Shares: 66,066
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 36,066 | $0 | $477,816 | -$477,816 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 47,528 | 30,000 | $499,044 | $313,617 | +$185,427 |
| 9-12 | 2,000 | 0 | $16,500 | $0 | +$16,500 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 20 reporting-owner rows connected to HARMONIC INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
20
Largest Forms 3/4/5 holder
Patrick Harshman
Net 12M change
-$275,889
Latest report
11 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Patrick Harshman | President and CEO, Director | $9,943,276 | Mixed | 15 May 2024 | ||
| Nimrod Ben-Natan | President and CEO, Director | $8,656,719 | Mixed | 11 Jun 2026 | ||
| Susan Swenson | Director | $4,234,186 | Mixed | 15 Feb 2024 | ||
| Sanjay Kalra | SVP and CFO | $4,156,008 | Mixed | 01 Mar 2023 | ||
| Mitzi Reaugh | Director | $3,644,644 | Mixed | 31 Dec 2024 | ||
| Nikos Theodosopoulos | Director | $3,132,374 | Mixed | 12 Aug 2022 | ||
| Jeremy Rosenberg | Interim CFO & SVP Bus Dev | $2,592,706 | Mixed | 15 May 2023 | ||
| David Krall | Director | $2,571,827 | +$499,044 | +24% | Mixed | 16 Mar 2026 |
| Walter Jankovic | Chief Financial Officer | $2,430,839 | Mixed | 11 Jun 2026 | ||
| Neven Haltmayer | SVP & GM, Video Business | $1,929,761 | -$734,221 | -28% | Mixed | 01 Jun 2026 |
| Timothy C. Chu | General Counsel & SVP, HR | $1,742,086 | Mixed | 15 May 2026 | ||
| Ian Graham | SVP, Global Sales & Video Svcs | $1,054,050 | Mixed | 15 May 2024 | ||
| Sophia Kim | Director | $555,366 | Mixed | 15 Feb 2024 | ||
| Whalen Daniel T. | Director | $464,327 | +$16,500 | +3.7% | Mixed | 16 Mar 2026 |
| Stephanie Copeland | Director | $438,504 | -$57,212 | -12% | Mixed | 14 May 2026 |
| Dana L. Crandall | Director | $414,672 | Mixed | 16 Mar 2026 | ||
| Ronald J. Glahn | SVP, Global Sales, Broadband | $348,576 | Median | 15 May 2026 | ||
| Patrick Gallagher | Director | $162,399 | Mixed | 16 Mar 2026 | ||
| Deborah Clifford | Director | $162,399 | Mixed | 16 Mar 2026 | ||
| Indraneel Dev | Director | $162,399 | Mixed | 16 Mar 2026 |
Recent insider transactions for HARMONIC 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Walter Jankovic | HLIT | Common Stock | Tax liability | -0.47% | -732 | 156,260 | 11 Jun 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Options Exercise | 0.94% | 1,457 | 156,992 | 11 Jun 2026 | Direct | ||
| Walter Jankovic | HLIT | Restricted Stock Units | Options Exercise | -20% | -1,457 | 5,828 | 11 Jun 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Common Stock | Options Exercise | 2.94% | 20,032 | 701,753 | 11 Jun 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Restricted Stock Units | Options Exercise | -20% | -20,032 | 80,128 | 11 Jun 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Tax liability | -1.02% | -1,452 | 140,513 | 01 Jun 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Options Exercise | 1.96% | 2,725 | 141,965 | 01 Jun 2026 | Direct | ||
| Neven Haltmayer | HLIT | Restricted Stock Units | Options Exercise | -20% | -2,725 | 10,897 | 01 Jun 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Tax liability | -2.1% | -3,335 | 155,535 | 22 May 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Options Exercise | 4.37% | 6,645 | 158,870 | 22 May 2026 | Direct | ||
| Walter Jankovic | HLIT | Restricted Stock Units | Options Exercise | -100% | -6,645 | 0 | 22 May 2026 | Direct | ||
| Ronald J. Glahn | HLIT | Common Stock | Tax liability | -2.78% | -1,111 | 38,817 | 15 May 2026 | Direct | ||
| Ronald J. Glahn | HLIT | Common Stock | Options Exercise | 11.2% | 4,038 | 39,928 | 15 May 2026 | Direct | ||
| Ronald J. Glahn | HLIT | Restricted Stock Units | Options Exercise | -12.5% | -4,038 | 28,266 | 15 May 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Tax liability | -5.64% | -9,099 | 152,225 | 15 May 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Options Exercise | 14% | 19,785 | 161,324 | 15 May 2026 | Direct | ||
| Walter Jankovic | HLIT | Restricted Stock Units | Options Exercise | -75.5% | -19,785 | 6,435 | 15 May 2026 | Direct | ||
| Timothy C. Chu | HLIT | Common Stock | Tax liability | -2.38% | -3,475 | 142,501 | 15 May 2026 | Direct | ||
| Timothy C. Chu | HLIT | Common Stock | Options Exercise | 7.26% | 9,876 | 145,976 | 15 May 2026 | Direct | ||
| Timothy C. Chu | HLIT | Restricted Stock Units | Options Exercise | -35.2% | -9,876 | 18,160 | 15 May 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Tax liability | -4.17% | -6,057 | 139,240 | 15 May 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Options Exercise | 8.49% | 11,373 | 145,297 | 15 May 2026 | Direct | ||
| Neven Haltmayer | HLIT | Restricted Stock Units | Options Exercise | -39.3% | -11,373 | 17,555 | 15 May 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Common Stock | Options Exercise | 4% | 26,196 | 681,721 | 15 May 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Restricted Stock Units | Options Exercise | -56.5% | -26,196 | 20,178 | 15 May 2026 | Direct | ||
| Stephanie Copeland | HLIT | Common Stock | Sale | -17.2% | $57,212 | $13.30 | -4,300 | 20,752 | 14 May 2026 | Direct |
| Neven Haltmayer | HLIT | Common Stock | Sale | -19.2% | $420,604 | $13.24 | -31,766 | 133,924 | 13 May 2026 | Direct |
| Ronald J. Glahn | HLIT | Common Stock | Tax liability | -2.82% | -1,042 | 35,890 | 15 Apr 2026 | Direct | ||
| Ronald J. Glahn | HLIT | Common Stock | Options Exercise | 11.3% | 3,750 | 36,932 | 15 Apr 2026 | Direct | ||
| Ronald J. Glahn | HLIT | Restricted Stock Units | Options Exercise | -20% | -3,750 | 15,000 | 15 Apr 2026 | Direct | ||
| Patrick Gallagher | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Timothy C. Chu | HLIT | Restricted Stock Units | Award | 59,230 | 59,230 | 16 Mar 2026 | Direct | |||
| Ronald J. Glahn | HLIT | Restricted Stock Units | Award | 49,161 | 49,161 | 16 Mar 2026 | Direct | |||
| Walter Jankovic | HLIT | Restricted Stock Units | Award | 133,268 | 133,268 | 16 Mar 2026 | Direct | |||
| Nimrod Ben-Natan | HLIT | Restricted Stock Units | Award | 281,343 | 281,343 | 16 Mar 2026 | Direct | |||
| Deborah Clifford | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Stephanie Copeland | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Dana L. Crandall | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Indraneel Dev | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| David Krall | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Whalen Daniel T. | HLIT | Restricted Stock Units | Award | 18,756 | 18,756 | 16 Mar 2026 | Direct | |||
| Walter Jankovic | HLIT | Common Stock | Tax liability | -0.36% | -513 | 141,539 | 11 Mar 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Options Exercise | 1.04% | 1,457 | 142,052 | 11 Mar 2026 | Direct | ||
| Walter Jankovic | HLIT | Restricted Stock Units | Options Exercise | -16.7% | -1,457 | 7,285 | 11 Mar 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Common Stock | Options Exercise | 3.15% | 20,032 | 655,525 | 11 Mar 2026 | Direct | ||
| Nimrod Ben-Natan | HLIT | Restricted Stock Units | Options Exercise | -16.7% | -20,032 | 100,160 | 11 Mar 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Tax liability | -0.87% | -1,451 | 165,690 | 01 Mar 2026 | Direct | ||
| Neven Haltmayer | HLIT | Common Stock | Options Exercise | 1.66% | 2,724 | 167,141 | 01 Mar 2026 | Direct | ||
| Neven Haltmayer | HLIT | Restricted Stock Units | Options Exercise | -16.7% | -2,724 | 13,622 | 01 Mar 2026 | Direct | ||
| Walter Jankovic | HLIT | Common Stock | Tax liability | -1.64% | -2,338 | 140,595 | 22 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.