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MARK W KROLL

CIK 1259254 · last filed 2026-07-28

MARK W KROLL is a corporate insider who has filed 66 SEC Form 4 insider transactions across 3 companies since 2007. The most recent filing, for HAE, was dated Jul 28, 2026. Across all open-market trades the lifetime net is −$9.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.7M across reported positions. 44 SEC filings were submitted jointly with AXON ENTERPRISE, INC.

"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

$7.69M

Companies

3

Total Filings

66

Lifetime Open-Market Net

-$9.84M

Filer Profile

Reported Address
125 SUMMER ST.
BOSTON, MA 02110
Related Filers
AXON ENTERPRISE, INC. — 44 joint filings, latest 2023-05-15
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
HAE Director 27,295 $105.36 $2.88M -$7.06M 32 2026-07-28
AXON Director 11,135 $432.25 $4.81M -$1.63M 6 2023-05-15
AXON ENTERPRISE, INC. (AAXN) Delisted Director 17,607 — — -$1.16M 11 2021-01-21

Recent Filings

66 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
2026-07-28 HAE Grant (A) +2,538 $0 EDGAR
2025-11-12 HAE Buy (P) +1,400 $98.8K EDGAR
2025-07-25 HAE Grant (A) +2,693 $0 EDGAR
2024-07-26 HAE Grant (A) +2,207 $0 EDGAR
2023-08-08 HAE Grant (A) +2,226 $0 EDGAR
2023-05-15 AXON Grant (A) +993 $0 EDGAR
2023-03-08 AXON Sell (S) −3,549 -$783.4K EDGAR
2022-08-16 HAE Sell (S) −8,016 -$590.9K EDGAR
2022-08-08 HAE Grant (A) +2,730 $0 EDGAR
2022-06-09 AXON Sell (S) −3,159 -$324.8K EDGAR
Showing 1–10 of 66
Page 1 of 7
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.