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David F. Byrnes

CIK 1768583 · EVP, CFO & Treasurer · last filed 2024-09-17

David F. Byrnes is an EVP, CFO & Treasurer who has filed 16 SEC Form 4 insider transactions across 4 companies since 2019. The most recent filing, for SPHR, was dated Sep 17, 2024. Across all open-market trades the lifetime net is −$196.8K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $808.8K across reported positions. 13 SEC filings were submitted jointly with Entertainment Co. Sphere.

"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

$808.8K

Companies

4

Total Filings

16

Lifetime Open-Market Net

-$196.8K

Filer Profile

Reported Address
C/O CBS CORPORATION
51 WEST 52ND STREET
NEW YORK, NY 10019
Related Filers
Entertainment Co. Sphere — 13 joint filings, latest 2024-09-17
Madison Square Garden Entertainment Corp. — 5 joint filings, latest 2024-02-13
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
SPHR EVP, CFO & Treasurer 3,678 $142.42 $523.8K -$196.8K 8 2024-09-17
MSGE EVP & Chief Financial Officer 3,682 $77.41 $285.0K $0 2 2023-09-19
Paramount Global (VIACA) Delisted SVP, Controller and CAO — $32.83 — $0 1 2019-12-06
Paramount Global (CBS.A) Delisted SVP, Controller and CAO 2,511 — — $0 2 2019-11-05

Recent Filings

16 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
2024-09-17 SPHR Mixed +7,308 -$321.6K EDGAR
2024-08-29 SPHR Grant (A) — $0 EDGAR
2024-04-24 SPHR Grant (A) — $0 EDGAR
2024-03-29 SPHR Grant (A) — $0 EDGAR
2024-02-15 SPHR Sell (S) −4,704 -$196.8K EDGAR
2024-02-13 SPHR Notice (144) −4,704 -$196.8K EDGAR
2024-02-13 MSGE Notice (144) −4,704 -$173.5K EDGAR
2023-09-19 MSGE Mixed +3,494 -$119.2K EDGAR
2023-09-06 MSGE Grant (A) — $0 EDGAR
2023-04-21 — Other (J) +1,210 $0
Showing 1–10 of 16
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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.