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Samuel T Byrne

CIK 1474915 · last filed 2020-07-30

Samuel T Byrne is a corporate insider who has filed 30 SEC Form 4 insider transactions across 4 companies since 2009. The most recent filing, for MGR, was dated Jul 30, 2020. Across all open-market trades the lifetime net is −$403.7K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $43.7M 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

$43.68M

Companies

4

Total Filings

30

Lifetime Open-Market Net

-$403.7K

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
MGR Director 27,146 $19.88 $539.7K -$31.7K 21 2020-07-30
AFFILIATED MANAGERS GROUP, INC. (MGR.CL) Delisted Director — — — $0 1 2017-08-03
AMG Director — $344.60 — $0 7 2012-07-26
AMRC 10%+ Owner 1,698,620 $25.40 $43.14M -$372.0K 1 2010-07-29

Recent Filings

30 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
2020-07-30 MGR Grant (A) — $0 EDGAR
2020-02-26 MGR Buy (P) +5,000 $425.7K EDGAR
2020-02-06 MGR Grant (A) — $0 EDGAR
2019-09-16 MGR Mixed +10,000 $808.4K EDGAR
2019-08-01 MGR Grant (A) — $0 EDGAR
2019-02-07 MGR Grant (A) — $0 EDGAR
2018-08-23 MGR Exer (M) +2,034 $183.5K EDGAR
2018-08-02 MGR Grant (A) — $0 EDGAR
2018-04-05 MGR Exer (M) +1,981 $197.4K EDGAR
2018-02-01 MGR Grant (A) — $0 EDGAR
Showing 1–10 of 30
Page 1 of 3
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.