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Federica F. O'Brien

CIK 1140119 · last filed 2026-05-20

Federica F. O'Brien is a corporate insider who has filed 14 SEC Form 4 insider transactions across 2 companies since 2020. The most recent filing, for MGNX, was dated May 20, 2026. Current disclosed insider exposure totals $76.1K 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

$76.1K

Companies

2

Total Filings

14

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
C/O TELA BIO, INC.
1 GREAT VALLEY PARKWAY, SUITE 24
MALVERN, PA 19355
Formerly Known As
OBRIEN FEDERICA F (2001–2001)
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
MGNX Director 14,750 $4.11 $60.5K $0 8 2026-05-20
TELA Director 18,470 $0.84 $15.6K $0 6 2025-05-30

Recent Filings

14 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
2026-05-20 MGNX Mixed +3,750 $0 EDGAR
2025-05-30 TELA Grant (A) +7,950 $0 EDGAR
2025-05-22 MGNX Mixed +6,500 $0 EDGAR
2024-06-06 TELA Grant (A) +4,250 $0 EDGAR
2024-05-23 MGNX Grant (A) — $0 EDGAR
2024-05-22 MGNX Exer (M) +4,500 $0 EDGAR
2023-06-02 TELA Grant (A) +3,135 $0 EDGAR
2023-06-02 MGNX Grant (A) — $0 EDGAR
2022-06-02 TELA Grant (A) +3,135 $0 EDGAR
2022-05-23 MGNX Grant (A) — $0 EDGAR
Showing 1–10 of 14
Page 1 of 2
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.