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Mangini Siobhan Nolan

CIK 1679464 · President and CFO · last filed 2026-07-07

Mangini Siobhan Nolan is a President and CFO who has filed 43 SEC Form 4 insider transactions across 3 companies since 2016. The most recent filing, for ALIT, was dated Jul 7, 2026. Across all open-market trades the lifetime net is −$740.3K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $256.4K 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

$256.4K

Companies

3

Total Filings

43

Lifetime Open-Market Net

-$740.3K

Filer Profile

Reported Address
C/O NMG BIOPHARMACEUTICALS, INC.
333 OYSTER POINT BLVD.
SOUTH SAN FRANCISCO, CA 94080
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
ALIT Director 17,153 $14.95 $256.4K $0 4 2026-07-07
NGM BIOPHARMACEUTICALS INC (NGM) Delisted President and CFO 76,000 $1.54 $117.0K $0 5 2023-03-06
CASTLIGHT HEALTH, INC. (CSLT) Delisted President 447,953 $2.05 $918.3K -$740.3K 34 2020-02-19

Recent Filings

43 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
2026-07-07 ALIT Grant (A) +14,025 $0 EDGAR
2025-07-07 ALIT Grant (A) +33,783 $0 EDGAR
2025-01-17 ALIT Grant (A) +10,954 $0 EDGAR
2024-01-03 ALIT Grant (A) +17,835 $0 EDGAR
2023-03-06 NGM BIOPHARMACEUTICALS INC (NGM) Delisted Grant (A) +76,000 $0 EDGAR
2022-07-01 NGM BIOPHARMACEUTICALS INC (NGM) Delisted Grant (A) — $0 EDGAR
2022-03-04 NGM BIOPHARMACEUTICALS INC (NGM) Delisted Grant (A) — $0 EDGAR
2021-03-18 NGM BIOPHARMACEUTICALS INC (NGM) Delisted Grant (A) — $0 EDGAR
2021-02-03 NGM BIOPHARMACEUTICALS INC (NGM) Delisted Grant (A) — $0 EDGAR
2020-02-19 CASTLIGHT HEALTH, INC. (CSLT) Delisted Mixed +49,108 -$42.7K EDGAR
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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.