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Elena Ridloff

CIK 1772518 · CFO · last filed 2026-08-10

Elena Ridloff is a CFO who has filed 43 SEC Form 4 insider transactions across 5 companies since 2019. The most recent filing, for IMUX, was dated Aug 10, 2026. Across all open-market trades the lifetime net is −$6.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $968.0K 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

$968.0K

Companies

5

Total Filings

43

Lifetime Open-Market Net

-$6.51M

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
IMUX Director — $14.58 — $0 1 2026-08-10
KYMR Director 3,000 $119.05 $357.1K -$2.06M 14 2026-06-25
SION CFO 47,368 $6.46 $306.0K -$1.97M 5 2026-01-06
Kronos Bio, Inc. (KRON) Delisted Director 0 $0.88 $0 $50.0K 6 2025-06-20
ACAD EVP and CFO 10,553 $28.89 $304.9K -$2.53M 9 2021-04-30

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
2026-08-10 IMUX Grant (A) — $0 EDGAR
2026-06-25 KYMR Grant (A) — $0 EDGAR
2026-05-11 KYMR Notice (144) −3,000 -$258.2K EDGAR
2026-05-11 KYMR Mixed — -$167.4K EDGAR
2026-04-01 KYMR Notice (144) −4,600 -$383.1K EDGAR
2026-04-01 KYMR Mixed — -$854.5K EDGAR
2026-03-31 KYMR Notice (144) −7,400 -$588.2K EDGAR
2026-01-06 SION Grant (A) — $0 EDGAR
2025-09-03 SION Sell (S) −9,584 -$240.4K EDGAR
2025-08-28 SION Sell (S) −23,416 -$601.9K EDGAR
Showing 1–10 of 43
Page 1 of 5
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.