Prober Charles J.

Director · Officer · LIF, NTGR

As of 2026-09-16, Prober Charles J. has 70 Form 4 transactions on record across 2 companies — 46 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 sales filed in September in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct: $10.3MIndirect: $0$10.3Mas of 2026-09-16
  • Direct $10.3M
  • Indirect $0
NTGRdirect426,294 sh$9.7M
LIFdirect15,860 sh$646K

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

LIF · 55 trades
2026-09-14: Sale, 7,930 sh ($334K)2026-09-14: Option exercise, 7,930 sh ($89K)2026-09-14: Option exercise, 7,930 sh ($0)2026-08-13: Sale, 7,930 sh ($385K)2026-08-13: Option exercise, 7,930 sh ($89K)2026-08-13: Option exercise, 7,930 sh ($0)2026-08-01: Award / grant, 19 sh ($0)2026-07-13: Sale, 7,930 sh ($421K)2026-07-13: Option exercise, 7,930 sh ($89K)2026-07-13: Option exercise, 7,930 sh ($0)2026-06-15: Sale, 7,930 sh ($365K)2026-06-15: Option exercise, 7,930 sh ($89K)2026-06-15: Option exercise, 7,930 sh ($0)2026-05-29: Award / grant, 4,455 sh ($0)2026-05-13: Sale, 7,930 sh ($321K)2026-05-13: Option exercise, 7,930 sh ($89K)2026-05-13: Option exercise, 7,930 sh ($0)2026-04-13: Sale, 7,930 sh ($296K)2026-04-13: Option exercise, 7,930 sh ($89K)2026-04-13: Option exercise, 7,930 sh ($0)2026-03-13: Sale, 7,930 sh ($328K)2026-03-13: Option exercise, 7,930 sh ($89K)2026-03-13: Option exercise, 7,930 sh ($0)2026-02-13: Sale, 7,930 sh ($389K)2026-02-13: Option exercise, 7,930 sh ($89K)2026-02-13: Option exercise, 7,930 sh ($0)2026-01-13: Sale, 7,930 sh ($492K)2026-01-13: Option exercise, 7,930 sh ($89K)2026-01-13: Option exercise, 7,930 sh ($0)2025-12-15: Sale, 7,930 sh ($542K)2025-12-15: Option exercise, 7,930 sh ($89K)2025-12-15: Option exercise, 7,930 sh ($0)2025-11-13: Sale, 7,930 sh ($610K)2025-11-13: Option exercise, 7,930 sh ($89K)2025-11-13: Option exercise, 7,930 sh ($0)2025-10-13: Sale, 7,930 sh ($818K)2025-10-13: Option exercise, 7,930 sh ($89K)2025-10-13: Option exercise, 7,930 sh ($0)2025-09-15: Sale, 7,930 sh ($795K)2025-09-15: Option exercise, 7,930 sh ($89K)2025-09-15: Option exercise, 7,930 sh ($0)2025-08-13: Sale, 7,930 sh ($667K)2025-08-13: Option exercise, 7,930 sh ($89K)2025-08-13: Option exercise, 7,930 sh ($0)2025-07-14: Sale, 7,930 sh ($511K)2025-07-14: Option exercise, 7,930 sh ($89K)2025-07-14: Option exercise, 7,930 sh ($0)2025-06-13: Sale, 7,942 sh ($489K)2025-06-13: Option exercise, 7,942 sh ($89K)2025-06-13: Option exercise, 7,942 sh ($0)2025-05-29: Award / grant, 2,714 sh ($0)2025-03-04: Sale, 49,500 sh ($2.1M)2025-03-04: Option exercise, 50,000 sh ($559K)2025-03-04: Sale, 500 sh ($21K)2025-03-04: Option exercise, 50,000 sh ($0)
NTGR · 15 trades
2026-07-31: Withheld for tax, 4,598 sh ($111K)2026-04-30: Withheld for tax, 18,394 sh ($465K)2026-04-02: Award / grant, 114,732 sh ($0)2026-04-02: Award / grant, 114,732 sh ($0)2026-01-31: Withheld for tax, 85,087 sh ($1.8M)2026-01-31: Withheld for tax, 61,790 sh ($1.3M)2026-01-31: Option exercise, 157,714 sh ($0)2026-01-31: Option exercise, 157,714 sh ($0)2025-06-04: Award / grant, 204,546 sh ($0)2025-06-04: Award / grant, 102,273 sh ($0)2025-02-20: Sale, 10,929 sh ($291K)2025-01-31: Withheld for tax, 115,733 sh ($3.2M)2025-01-31: Option exercise, 115,733 sh ($3.2M)2025-01-31: Option exercise, 52,661 sh ($1.5M)2025-01-31: Option exercise, 115,733 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-09-14LIFSale7,930 @ $42.12$334K−6.7% of holding109,930Form 4
2026-08-13LIFSale7,930 @ $48.59$385K−6.7% of holding109,930Form 4
2026-07-13LIFSale7,930 @ $53.05$421K−6.7% of holding109,911Form 4
2026-06-15LIFSale7,930 @ $46.07$365K−6.7% of holding109,911Form 4
2026-05-13LIFSale7,930 @ $40.44$321K−7.0% of holding105,456Form 4
2026-04-13LIFSale7,930 @ $37.27$296K−7.0% of holding105,456Form 4
2026-03-13LIFSale7,930 @ $41.40$328K−7.0% of holding105,456Form 4
2026-02-13LIFSale7,930 @ $49.02$389K−7.0% of holding105,456Form 4
2026-01-13LIFSale7,930 @ $61.98$492K−7.0% of holding105,456Form 4
2025-12-15LIFSale7,930 @ $68.30$542K−7.0% of holding105,456Form 4
2025-11-13LIFSale7,930 @ $76.93$610K−7.0% of holding105,456Form 4
2025-10-13LIFSale7,930 @ $103.20$818K−7.0% of holding105,456Form 4
2025-09-15LIFSale7,930 @ $100.24$795K−7.0% of holding105,456Form 4
2025-08-13LIFSale7,930 @ $84.13$667K−7.0% of holding105,456Form 4
2025-07-14LIFSale7,930 @ $64.41$511K−7.0% of holding105,456Form 4
2025-06-13LIFSale7,942 @ $61.63$489K−7.0% of holding105,456Form 4
2025-03-04LIFSale49,500 @ $41.51$2.1M−32.4% of holding103,242Form 4
2025-03-04LIFSale500 @ $42.17$21K−0.5% of holding102,742Form 4
2025-02-20NTGRSale10,929 @ $26.64$291K−2.1% of holding507,763Form 4
51 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-09-14LIFOption exercise7,930117,860Form 4
2026-09-14LIFOption exercise7,93015,860Form 4
2026-08-13LIFOption exercise7,930117,860Form 4
2026-08-13LIFOption exercise7,93023,790Form 4
2026-08-01LIFAward / grant19109,930Form 4
2026-07-31NTGRWithheld for tax4,598426,294Form 4
2026-07-13LIFOption exercise7,930117,841Form 4
2026-07-13LIFOption exercise7,93031,720Form 4
2026-06-15LIFOption exercise7,930117,841Form 4
2026-06-15LIFOption exercise7,93039,650Form 4
2026-05-29LIFAward / grant4,455109,911Form 4
2026-05-13LIFOption exercise7,930113,386Form 4
2026-05-13LIFOption exercise7,93047,580Form 4
2026-04-30NTGRWithheld for tax18,394430,892Form 4
2026-04-13LIFOption exercise7,930113,386Form 4
2026-04-13LIFOption exercise7,93055,510Form 4
2026-04-02NTGRAward / grant114,732114,732Form 4
2026-04-02NTGRAward / grant114,732448,272Form 4
2026-03-13LIFOption exercise7,930113,386Form 4
2026-03-13LIFOption exercise7,93063,440Form 4
2026-02-13LIFOption exercise7,930113,386Form 4
2026-02-13LIFOption exercise7,93071,370Form 4
2026-01-31NTGRWithheld for tax85,087682,663Form 4
2026-01-31NTGRWithheld for tax61,790620,873Form 4
2026-01-31NTGROption exercise157,714151,940Form 4
2026-01-31NTGROption exercise157,714767,750Form 4
2026-01-13LIFOption exercise7,930113,386Form 4
2026-01-13LIFOption exercise7,93079,300Form 4
2025-12-15LIFOption exercise7,930113,386Form 4
2025-12-15LIFOption exercise7,93087,230Form 4
2025-11-13LIFOption exercise7,930113,386Form 4
2025-11-13LIFOption exercise7,93095,160Form 4
2025-10-13LIFOption exercise7,930113,386Form 4
2025-10-13LIFOption exercise7,930103,090Form 4
2025-09-15LIFOption exercise7,930113,386Form 4
2025-09-15LIFOption exercise7,930111,020Form 4
2025-08-13LIFOption exercise7,930113,386Form 4
2025-08-13LIFOption exercise7,930118,950Form 4
2025-07-14LIFOption exercise7,930113,386Form 4
2025-07-14LIFOption exercise7,930126,880Form 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.