RMBS insider buying and SEC filings, explained
Rambus Inc. · CIK 917273
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$12.3M
Planned sales (10b5-1)
$8.7M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Oct 2, 2026 | Planned (10b5-1) | Charles Kissner (Director) sold 5,000 shares indirectly at $111.00 ($555K), marked as a 10b5-1 plan trade. Indirect holdings down 57% to 3,747 shares. | SEC filing Filed Oct 5, 2026, 2:44 PM ET |
| Sep 22, 2026 | Planned (10b5-1) | Charles Kissner (Director) sold 5,000 shares indirectly at $105.00 ($525K), marked as a 10b5-1 plan trade. Indirect holdings down 36% to 8,747 shares. | SEC filing Filed Sep 24, 2026 |
| Aug 7, 2026 | Planned (10b5-1) | Charles Kissner (Director) sold 5,000 shares indirectly at $100.92 ($505K), marked as a 10b5-1 plan trade. Indirect holdings down 27% to 13,747 shares. | SEC filing Filed Aug 10, 2026 |
| Jun 3, 2026 | Sale | Necip Sayiner (Director) sold 5,000 shares at $170.15 ($851K). Holdings down 22% to 18,223 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Jun 2, 2026 | Sale | Emiko Higashi (Director) sold 10,000 shares at about $160.50 ($1.6M). Holdings down 17% to 49,519 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 3, 2026 |
| Jun 1, 2026 | Sale | Eric B. Stang (Director) sold 5,000 shares indirectly at $146.00 ($730K). Indirect holdings down 21% to 19,218 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 2, 2026 |
| May 26, 2026 | Sale | Emiko Higashi (Director) sold 5,000 shares at $157.57 ($788K). Holdings down 8% to 59,519 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 27, 2026 |
| May 26, 2026 | Sale | Xianzhi Sean Fan (President / COO) sold 37,914 shares at about $151.69 ($5.8M). Holdings down 18% to 168,358 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 26, 2026 |
| May 22, 2026 | Sale | John Shinn (SVP, General Counsel) sold 1,000 shares at $143.63 ($144K). Holdings down 5% to 21,112 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 26, 2026 |
| May 8, 2026 | Sale | Necip Sayiner (Director) sold 9,824 shares at $130.18 ($1.3M). Holdings down 30% to 23,223 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 11, 2026 |
| May 7, 2026 | Sale | Steven Laub (Director) sold 1,500 shares at about $125.52 ($188K). Holdings down 17% to 7,519 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed May 11, 2026 |
| Apr 24, 2026 | Planned (10b5-1) | Meera Rao (Director) sold 2,972 shares at $150.30 ($447K), marked as a 10b5-1 plan trade. Holdings down 13% to 19,974 shares. | SEC filing Filed Apr 27, 2026 |
| Apr 14, 2026 | Planned (10b5-1) | Meera Rao (Director) sold 8,538 shares at $118.08 ($1.0M), marked as a 10b5-1 plan trade. Holdings down 27% to 22,946 shares. | SEC filing Filed Apr 15, 2026 |
| Apr 2, 2026 | Planned (10b5-1) | Luc Seraphin (CEO and Director) sold 5,426 shares at about $86.65 ($470K), marked as a 10b5-1 plan trade. Holdings down 2% to 345,767 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 10, 2026 | Planned (10b5-1) | John Shinn (SVP, General Counsel) sold 4,556 shares at about $88.68 ($404K), marked as a 10b5-1 plan trade. Holdings down 20% to 18,467 shares. | SEC filing Filed Mar 11, 2026 |
| Mar 3, 2026 | Planned (10b5-1) | John Shinn (SVP, General Counsel) sold 4,557 shares at about $93.55 ($426K), marked as a 10b5-1 plan trade. Holdings down 17% to 23,023 shares. | SEC filing Filed Mar 4, 2026 |
| Mar 2, 2026 | Planned (10b5-1) | Luc Seraphin (CEO and Director) sold 39,914 shares at about $98.63 ($3.9M), marked as a 10b5-1 plan trade. Holdings down 11% to 331,070 shares. | SEC filing Filed Mar 3, 2026 |
| Feb 23, 2026 | Planned (10b5-1) | Desmond Lynch (CFO) sold 4,273 shares at $101.53 ($434K), marked as a 10b5-1 plan trade. Holdings down 6% to 63,618 shares. | SEC filing Filed Feb 24, 2026 |
| Nov 7–10, 2025 | Sale | Eric B. Stang (Director) sold 9,000 shares indirectly between Nov 7, 2025 and Nov 10, 2025 at about $106.55 ($959K). Indirect holdings down 31% to 20,394 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Nov 12, 2025 |
20 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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