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Kevin Bitterman

CIK 1591747 · last filed 2026-09-03

Kevin Bitterman is a corporate insider who has filed 42 SEC Form 4 insider transactions across 4 companies since 2014. The most recent filing shows the insider sold $4.4M of IRON on Sep 3, 2026. Across all open-market trades the lifetime net is −$76.5M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $33.8M 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

$33.83M

Companies

4

Total Filings

42

Lifetime Open-Market Net

-$76.50M

Filer Profile

Reported Address
C/O POLARIS VENTURE PARTNERS
1000 WINTER STREET, SUITE 3350
WALTHAM, MA 02451
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
IRON Director 312,989 $79.23 $24.80M -$51.59M 21 2026-09-03
Akero Therapeutics, Inc. (AKRO) Delisted Director 0 $54.65 $0 $3.48M 6 2021-06-03
EDIT Director 2,797,144 $3.23 $9.03M -$31.19M 10 2017-06-19
GENOCEA BIOSCIENCES, INC. (GNCA) Delisted Director 171,820 $0.00 $103 $2.79M 3 2016-06-07

Recent Filings

42 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
2026-09-03 IRON Sell (S) −54,496 -$4.37M EDGAR
2026-06-23 IRON Grant (A) — $0 EDGAR
2025-12-18 IRON Sell (S) −754 -$69.0K EDGAR
2025-12-16 IRON Mixed −177,123 -$16.76M EDGAR
2025-12-15 IRON Notice (144) −7,000 -$643.1K EDGAR
2025-10-17 IRON Sell (S) −93,585 -$8.05M EDGAR
2025-10-09 IRON Sell (S) −90,000 -$6.31M EDGAR
2025-08-26 IRON Sell (S) −2,287 -$139.6K EDGAR
2025-08-15 IRON Sell (S) −32,174 -$1.97M EDGAR
2025-08-07 IRON Sell (S) −395 -$24.1K EDGAR
Showing 1–10 of 42
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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.