Klein Mark D

Director · Officer · NSLR, SSSS

As of 2026-09-16, Klein Mark D has 16 Form 4 transactions on record across 2 companies — 8 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Pattern in the record: open-market purchases filed in August in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct: $32.8MIndirect: $0$32.8Mas of 2026-09-16
  • Direct $32.8M
  • Indirect $0
SSSSdirect1,732,756 sh$18.8M
NSLRdirect1,758,796 sh$14.0M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

SSSS · 15 trades
2026-06-15: Withheld for tax, 293,265 sh ($4.0M)2026-06-12: Award / grant, 350,000 sh ($0)2026-04-22: Purchase, 2,500 sh ($33K)2026-04-21: Purchase, 2,500 sh ($33K)2025-12-15: Withheld for tax, 17,017 sh ($157K)2025-12-10: Withheld for tax, 17,017 sh ($163K)2025-11-21: Award / grant, 174,465 sh ($0)2025-08-12: Purchase, 10,000 sh ($85K)2025-08-11: Purchase, 4,571 sh ($40K)2025-05-16: Award / grant, 300,000 sh ($0)2025-05-09: Purchase, 16,500 sh ($87K)2025-02-10: Withheld for tax, 32,858 sh ($203K)2024-12-16: Withheld for tax, 17,017 sh ($102K)2024-12-10: Withheld for tax, 21,272 sh ($131K)2024-12-10: Award / grant, 100,000 sh ($0)
NSLR · 1 trade
2026-08-10: Purchase, 26,040 sh ($250K)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-08-10NSLRPurchase26,040 @ $9.60$250K+1.5% of holding1,758,796Form 4
2026-04-22SSSSPurchase2,500 @ $13.25$33K+0.1% of holding1,676,021Form 4
2026-04-21SSSSPurchase2,500 @ $13.08$33K+0.1% of holding1,673,521Form 4
2025-08-12SSSSPurchase10,000 @ $8.45$85K+0.7% of holding1,530,590Form 4
2025-08-11SSSSPurchase4,571 @ $8.69$40K+0.3% of holding1,520,590Form 4
2025-05-09SSSSPurchase16,500 @ $5.26$87K+1.4% of holding1,216,019Form 4
10 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-15SSSSWithheld for tax293,2651,732,756Form 4
2026-06-12SSSSAward / grant350,0002,026,021Form 4
2025-12-15SSSSWithheld for tax17,0171,671,021Form 4
2025-12-10SSSSWithheld for tax17,0171,688,038Form 4
2025-11-21SSSSAward / grant174,4651,705,055Form 4
2025-05-16SSSSAward / grant300,0001,516,019Form 4
2025-02-10SSSSWithheld for tax32,8581,199,519Form 4
2024-12-16SSSSWithheld for tax17,0171,232,377Form 4
2024-12-10SSSSWithheld for tax21,2721,249,394Form 4
2024-12-10SSSSAward / grant100,0001,270,666Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.