MNKD insider buying and SEC filings, explained
Mannkind Corp. · CIK 899460
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$259K
Insiders who bought
1
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$3.3M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 25, 2026 | Planned (10b5-1) | Steven B. Binder (Director) sold 39,051 shares at about $3.29 ($128K), marked as a 10b5-1 plan trade. Holdings down 5% to 713,258 shares. | SEC filing Filed Sep 28, 2026 |
| Sep 10, 2026 | Planned (10b5-1) | Steven B. Binder (Director) sold 33,558 shares at about $3.81 ($128K), marked as a 10b5-1 plan trade. Holdings down 4% to 752,309 shares. | SEC filing Filed Sep 14, 2026 |
| Aug 7, 2026 | Planned (10b5-1) | Steven B. Binder (Director) sold 39,051 shares at about $4.06 ($159K), marked as a 10b5-1 plan trade. Holdings down 5% to 785,867 shares. | SEC filing Filed Aug 10, 2026 |
| Jul 17, 2026 | Planned (10b5-1) | David Thomson (EVP Genl Counsel & Secretary) sold 24,109 shares at about $4.05 ($98K), marked as a 10b5-1 plan trade. Holdings down 3% to 797,554 shares. | SEC filing Filed Jul 17, 2026 |
| Jul 17, 2026 | Planned (10b5-1) | Steven B. Binder (Director) sold 52,485 shares at about $4.06 ($213K), marked as a 10b5-1 plan trade. Holdings down 6% to 824,918 shares. | SEC filing Filed Jul 17, 2026 |
| May 12, 2026 | Planned (10b5-1) | Steven B. Binder (Director) sold 16,940 shares at about $3.29 ($56K), marked as a 10b5-1 plan trade. Holdings down 2% to 808,008 shares. | SEC filing Filed May 13, 2026 |
| May 12, 2026 | Planned (10b5-1) | David Thomson (EVP Genl Counsel & Secretary) sold 3,033 shares at about $3.29 ($10K), marked as a 10b5-1 plan trade. Holdings down <1% to 826,299 shares. | SEC filing Filed May 13, 2026 |
| Mar 10, 2026 | Purchase (code P) | Michael Castagna (CEO and Director) bought 100,000 shares at about $2.59 ($259K), reported as a purchase (code P). Holdings up 4% to 2,575,911 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 10, 2026 |
| Jan 8, 2026 | Planned (10b5-1) | Stuart A Tross (Chief People & Workpl Officer) sold 47,006 shares at $6.33 ($298K), marked as a 10b5-1 plan trade. Holdings down 5% to 985,007 shares. | SEC filing Filed Jan 9, 2026 |
| Dec 17, 2025 | Planned (10b5-1) | Michael Castagna (CEO and Director) sold 65,804 shares at about $6.01 ($395K), marked as a 10b5-1 plan trade. Holdings down 3% to 2,504,792 shares. | SEC filing Filed Dec 19, 2025 |
| Dec 12–16, 2025 | Planned (10b5-1) | Michael Castagna (CEO and Director) sold 42,116 shares between Dec 12, 2025 and Dec 16, 2025 at $6.00 ($253K), marked as a 10b5-1 plan trade. Holdings down 2% to 2,504,792 shares. | SEC filing Filed Dec 16, 2025 |
| Dec 2, 2025 | Planned (10b5-1) | Michael Castagna (CEO and Director) sold 107,920 shares at about $5.57 ($601K), marked as a 10b5-1 plan trade. Holdings down 4% to 2,504,792 shares. | SEC filing Filed Dec 4, 2025 |
| Dec 2, 2025 | Planned (10b5-1) | David Thomson (EVP Genl Counsel & Secretary) sold 147,780 shares at about $5.57 ($823K), marked as a 10b5-1 plan trade. Holdings down 15% to 841,719 shares. | SEC filing Filed Dec 4, 2025 |
| Nov 14, 2025 | Planned (10b5-1) | Sanjay R Singh (EVP Technical Operations) sold 18,777 shares at about $5.03 ($94K), marked as a 10b5-1 plan trade. Holdings down 4% to 455,211 shares. | SEC filing Filed Nov 14, 2025 |
42 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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