As of the latest Form 4 filed Jun 22, 2026.
What Harmonic Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 25 most recent filings for HLIT.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-22 | 2026-06-16 | Haltmayer Neven SVP & GM, Video Business | FTax | −23.8K | $14.80 | $352K | No | Form 4 ↗ |
| 2026-06-22 | 2026-06-16 | Haltmayer Neven, SVP & GM, Video Business | MExercise | +44.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Jankovic Walter Chief Financial Officer | FTax | −732.00 | $14.51 | $10.6K | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Jankovic Walter, Chief Financial Officer | MExercise | +1.46K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-15 | 2026-06-11 | Ben-Natan Nimrod President and CEO | MExercise | +20.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-01 | Haltmayer Neven SVP & GM, Video Business | FTax | −1.45K | $15.81 | $23.0K | No | Form 4 ↗ |
| 2026-06-03 | 2026-06-01 | Haltmayer Neven, SVP & GM, Video Business | MExercise | +2.73K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Jankovic Walter Chief Financial Officer | FTax | −3.33K | $15.20 | $50.7K | No | Form 4 ↗ |
| 2026-05-27 | 2026-05-22 | Jankovic Walter, Chief Financial Officer | MExercise | +6.64K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Glahn Ronald J SVP, Global Sales, Broadband | FTax | −1.11K | $12.54 | $13.9K | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Glahn Ronald J, SVP, Global Sales, Broadband | MExercise | +4.04K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Jankovic Walter Chief Financial Officer | FTax | −9.10K | $12.54 | $114K | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Jankovic Walter, Chief Financial Officer | MExercise | +19.8K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Chu Timothy C General Counsel & SVP, HR | FTax | −3.48K | $12.54 | $43.6K | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Chu Timothy C, General Counsel & SVP, HR | MExercise | +9.88K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Haltmayer Neven SVP & GM, Video Business | FTax | −6.06K | $12.54 | $76.0K | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Haltmayer Neven, SVP & GM, Video Business | MExercise | +11.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-19 | 2026-05-15 | Ben-Natan Nimrod President and CEO | MExercise | +26.2K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-18 | 2026-05-14 | Copeland Stephanie Director | SSale | −4.30K | $13.31 | $57.2K | No | Form 4 ↗ |
| 2026-05-15 | 2026-05-13 | Haltmayer Neven SVP & GM, Video Business | SSale | −31.8K | $13.24 | $421K | No | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Glahn Ronald J SVP, Global Sales, Broadband | FTax | −1.04K | $9.88 | $10.3K | No | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Glahn Ronald J, SVP, Global Sales, Broadband | MExercise | +3.75K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Jankovic Walter Chief Financial Officer | FTax | −513.00 | $9.34 | $4.79K | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Jankovic Walter, Chief Financial Officer | MExercise | +1.46K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-13 | 2026-03-11 | Ben-Natan Nimrod President and CEO | MExercise | +20.0K | $0.00 | $0.00 | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also HLIT’s full analysis or the market-wide insider trading feed. The tabs above jump to HLIT’s other SEC data.
Source: SEC Form 4 filings for HLIT, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.