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CHRISTOPHER J TWOMEY

CIK 1238935 · Senior Vice President Finan · last filed 2026-05-22

CHRISTOPHER J TWOMEY is a Senior Vice President Finan who has filed 77 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for TNDM, was dated May 22, 2026. Across all open-market trades the lifetime net is −$26.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $628.7K 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

$628.7K

Companies

7

Total Filings

77

Lifetime Open-Market Net

-$26.01M

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
TNDM Director 29,546 $21.28 $628.7K -$5.14M 28 2026-05-22
BNGO Director — $1.22 — $0 3 2026-05-14
Bionano Genomics, Inc. (BNGOW) Delisted Director 64,500 $0.00 $232 $0 10 2023-06-16
SENOMYX INC (SNMX) Delisted Director — — — $0 14 2018-11-02
Bionano Genomics, Inc. (BNGOU) Delisted Director 10,000 — — $61.2K 1 2018-08-27
CADENCE PHARMACEUTICALS INC (CADX) Delisted Director 25,000 — — $0 11 2013-06-13
BIOSITE INC (BSTE) Delisted Senior Vice President Finan 0 — — -$20.93M 9 2007-06-29

Recent Filings

77 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
2026-05-22 TNDM Mixed +8,759 $0 EDGAR
2026-05-14 BNGO Grant (A) — $0 EDGAR
2025-06-12 BNGO Grant (A) — $0 EDGAR
2025-05-23 TNDM Mixed +4,387 $90.5K EDGAR
2024-06-20 BNGO Grant (A) — $0 EDGAR
2024-05-24 TNDM Mixed +4,434 $229.4K EDGAR
2023-06-16 Bionano Genomics, Inc. (BNGOW) Delisted Grant (A) — $0 EDGAR
2023-05-26 TNDM Exer (M) +2,757 $0 EDGAR
2022-07-18 Bionano Genomics, Inc. (BNGOW) Delisted Grant (A) — $0 EDGAR
2022-06-13 Bionano Genomics, Inc. (BNGOW) Delisted Grant (A) — $0 EDGAR
Showing 1–10 of 77
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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.