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STEPHEN MCMILLAN

CIK 1719723 · President and CEO · last filed 2026-09-17

STEPHEN MCMILLAN is a President and CEO who has filed 56 SEC Form 4 insider transactions across 3 companies since 2017. The most recent filing shows the insider sold $300.2K of TDC on Sep 17, 2026. Across all open-market trades the lifetime net is −$11.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $25.9M across reported positions. 3 SEC filings were submitted jointly with CENTURYLINK, INC.

"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

$25.89M

Companies

3

Total Filings

56

Lifetime Open-Market Net

-$11.82M

Filer Profile

Reported Address
C/O F5 NETWORKS, INC.
401 ELLIOTT AVE. WEST
SEATTLE, WA 98119
Related Filers
CENTURYLINK, INC — 3 joint filings, latest 2026-05-26
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
TDC President and CEO 752,446 $28.94 $21.78M -$8.93M 34 2026-09-17
LUMN Director 76,591 $5.71 $437.3K $0 2 2026-05-26
FFIV EVP of Global Services 8,291 $443.06 $3.67M -$2.89M 12 2020-05-05

Recent Filings

56 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
2026-09-17 TDC Sell (S) −10,000 -$300.2K EDGAR
2026-09-15 TDC Notice (144) −10,000 -$293.7K EDGAR
2026-05-26 LUMN Grant (A) +25,197 $237.9K EDGAR
2026-05-13 TDC Sell (S) −20,000 -$634.2K EDGAR
2026-05-12 TDC Notice (144) −20,000 -$634.2K EDGAR
2026-03-10 TDC Mixed +179,665 -$622.9K EDGAR
2026-03-05 TDC Tax (F) −40,319 -$1.22M EDGAR
2026-03-03 TDC Tax (F) −20,090 -$632.6K EDGAR
2026-02-27 TDC Sell (S) −50,000 -$1.51M EDGAR
2026-02-26 TDC Notice (144) −50,000 -$1.51M EDGAR
Showing 1–10 of 56
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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.