Insider transactions

Michael Byron

CIK 1516062 · Principal Accounting Officer · last filed 2026-09-23

Michael Byron is a Principal Accounting Officer who has filed 53 SEC Form 4 insider transactions across 2 companies since 2011. The most recent filing shows the insider exercised options covering $148.2K of ALMU on Sep 23, 2026. Across all open-market trades the lifetime net is −$16.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $644.4M across reported positions. 53 SEC filings were submitted jointly with NVIDIA CORP.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure
$644.40M
Companies
2
Total Filings
53
Lifetime Open-Market Net
-$16.43M

Charts

Trading activity, where the exposure sits, and each trade against the stock price.

NVDA price and trades

Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.

Shares held

Shares owned after each reported transaction on this company (direct holdings as reported).

Open-market buying and selling

by month

Dollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.

Exposure by company

latest
OfficerDirector10% owner* stale (no filing in 3 yrs)

Most recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.

Filer Profile

Reported Address
C/O NVIDIA CORPORATION
2701 SAN TOMAS EXPRESSWAY
SANTA CLARA, CA 95050
Related Filers
NVIDIA CORP — 53 joint filings, latest 2019-06-17
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
ALMU Director 38,343 $7.80 $299.1K $0 2 2026-09-23
NVDA Principal Accounting Officer 2,966,960 $217.09 $644.10M -$16.43M 51 2019-03-22

Recent Filings

53 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-09-23 ALMU Exer (M) +25,000 $148.2K EDGAR
2026-03-02 ALMU Grant (A) +13,343 $0 EDGAR
2019-03-22 NVDA Tax (F) −8,414 -$1.47M EDGAR
2019-03-12 NVDA Grant (A) +4,700 $0 EDGAR
2019-03-05 NVDA Sell (S) −114 -$17.6K EDGAR
2019-02-20 NVDA Disp (D) −2,951 $0 EDGAR
2018-12-14 NVDA Tax (F) −575 -$85.6K EDGAR
2018-09-26 NVDA Sell (S) −11,257 -$2.97M EDGAR
2018-09-21 NVDA Mixed −8,958 -$2.00M EDGAR
2018-09-13 NVDA Grant (A) +860 $0 EDGAR
Showing 1–10 of 53
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.