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Mary S Chan

CIK 1641154 · Chief Operating Officer · last filed 2026-05-27

Mary S Chan is a Chief Operating Officer who has filed 46 SEC Form 4 insider transactions across 4 companies since 2015. The most recent filing, for SBAC, was dated May 27, 2026. Across all open-market trades the lifetime net is −$4.9M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $1.1M across reported positions.

"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

$1.12M

Companies

4

Total Filings

46

Lifetime Open-Market Net

-$4.92M

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
SBAC Director 6,421 $174.93 $1.12M -$4.90M 32 2026-05-27
Nikola Corp (NKLA) Delisted Chief Operating Officer 66,757 $0.18 $12.2K -$21.2K 4 2024-09-06
Vistance Networks, Inc. (COMM) Delisted Director 93,259 $19.65 $1.83M $0 5 2023-05-15
Nikola Corp (VTIQW) Delisted Chief Operating Officer 11,448 $0.00 $29 $0 1 2018-10-04

Recent Filings

46 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
2026-05-27 SBAC Grant (A) — $0 EDGAR
2026-05-05 SBAC Mixed +555 -$72.1K EDGAR
2026-04-14 SBAC Mixed +48 -$6.4K EDGAR
2025-05-28 SBAC Grant (A) — $0 EDGAR
2025-05-05 SBAC Mixed +456 -$65.3K EDGAR
2025-03-04 SBAC Mixed — -$85.5K EDGAR
2025-02-28 SBAC Notice (144) −1,411 -$307.7K EDGAR
2024-09-06 Nikola Corp (NKLA) Delisted Sell (S) −717 -$4.4K EDGAR
2024-09-04 — Notice (144) −717 -$4.4K EDGAR
2024-05-28 SBAC Grant (A) — $0 EDGAR
Showing 1–10 of 46
Page 1 of 5
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.