Arkolith/Insider Trading/HKHC

HKHC Insider Trading

Horizon Kinetics Holding Corp · full profile →Last filing Mar 20, 2026
Net Buying · 180d
Open-Market Buys (180d)
$40K
5 insiders
Open-Market Sells (180d)
$0
0 insiders
Net Insider Flow
$40K
open market, 180d
Reporting Insiders
5
15 P/S transactions
Build

Build on these Form 4 transactions

The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.

Form 4 insider API

Open-market buys and sells, cluster scans, company flows.

insider.transactions

13F holdings API

Owners, holdings, deltas, point-in-time portfolios.

stock.owners

MCP quickstart

Connect an agent, mint a key, make the first call.

/api/mcp

Recent Form 4 Transactions

100 shown
DateInsiderRoleActionSharesPriceValue
Mar 20, 2026Nagelberg AllisonDirectorBuy(P)150$33.96$5K
Mar 20, 2026Horizon Common Inc10% OwnerBuy(P)10$34.60$346
Mar 20, 2026Horizon Common Inc10% OwnerBuy(P)18$34.60$623
Mar 20, 2026Horizon Common Inc10% OwnerBuy(P)25$34.60$865
Mar 20, 2026Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)18$34.60$623
Mar 20, 2026Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)25$34.60$865
Mar 20, 2026Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)10$34.60$346
Mar 19, 2026Horizon Common Inc10% OwnerBuy(P)18$34.06$613
Mar 19, 2026Horizon Common Inc10% OwnerBuy(P)25$34.06$852
Mar 19, 2026Horizon Common Inc10% OwnerBuy(P)46$34.06$2K
Mar 18, 2026Rosenthal Brent DDirectorBuy(P)750$33.05$25K
Mar 18, 2026Herndon MarkChief Financial OfficerBuy(P)80$33.03$3K
Mar 18, 2026Horizon Common Inc10% OwnerBuy(P)10$34.00$340
Mar 18, 2026Horizon Common Inc10% OwnerBuy(P)9$34.00$306
Mar 18, 2026Horizon Common Inc10% OwnerBuy(P)8$34.00$272
Dec 23, 2025Maran Partners Fund, LPDirectorOther(J)42K—$0
Dec 23, 2025Maran Partners Fund, LPDirectorOther(J)25K—$0
Dec 10, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.00$324
Dec 10, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$27.00$162
Dec 10, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.00$108
Dec 9, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.00$108
Dec 9, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$27.00$162
Dec 9, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.00$324
Dec 8, 2025Horizon Common Inc10% OwnerBuy(P)6$26.73$160
Dec 8, 2025Horizon Common Inc10% OwnerBuy(P)12$26.73$321
Dec 8, 2025Horizon Common Inc10% OwnerBuy(P)4$26.73$107
Dec 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.75$111
Dec 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$27.75$167
Dec 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.75$333
Dec 4, 2025Horizon Common Inc10% OwnerBuy(P)12$27.75$333
Dec 4, 2025Horizon Common Inc10% OwnerBuy(P)6$27.75$167
Dec 4, 2025Horizon Common Inc10% OwnerBuy(P)4$27.75$111
Dec 3, 2025Horizon Common Inc10% OwnerBuy(P)12$27.00$324
Dec 3, 2025Horizon Common Inc10% OwnerBuy(P)4$27.00$108
Dec 3, 2025Horizon Common Inc10% OwnerBuy(P)6$27.00$162
Dec 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$27.23$163
Dec 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.23$327
Dec 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.23$109
Dec 1, 2025Horizon Common Inc10% OwnerBuy(P)12$27.00$324
Dec 1, 2025Horizon Common Inc10% OwnerBuy(P)4$27.00$108
Dec 1, 2025Horizon Common Inc10% OwnerBuy(P)6$27.00$162
Nov 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$27.23$163
Nov 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.23$327
Nov 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.23$109
Nov 26, 2025Horizon Common Inc10% OwnerBuy(P)12$27.23$327
Nov 26, 2025Horizon Common Inc10% OwnerBuy(P)8$27.23$218
Nov 26, 2025Horizon Common Inc10% OwnerBuy(P)4$27.23$109
Nov 25, 2025Rosenthal Brent DDirectorBuy(P)300$27.28$8K
Nov 25, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$27.00$216
Nov 25, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$27.00$324
Nov 25, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$27.00$108
Nov 24, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$28.00$112
Nov 24, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)12$28.00$336
Nov 24, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$28.00$224
Nov 21, 2025Horizon Common Inc10% OwnerBuy(P)12$28.25$339
Nov 21, 2025Horizon Common Inc10% OwnerBuy(P)4$28.25$113
Nov 21, 2025Horizon Common Inc10% OwnerBuy(P)9$28.25$254
Nov 20, 2025Herndon MarkChief Financial OfficerBuy(P)100$29.00$3K
Nov 20, 2025Horizon Common Inc10% OwnerBuy(P)4$27.50$110
Nov 20, 2025Horizon Common Inc10% OwnerBuy(P)9$27.50$248
Nov 20, 2025Horizon Common Inc10% OwnerBuy(P)11$27.50$303
Sep 9, 2025Horizon Common Inc10% OwnerBuy(P)4$38.30$153
Sep 9, 2025Horizon Common Inc10% OwnerBuy(P)8$38.30$306
Sep 9, 2025Horizon Common Inc10% OwnerBuy(P)7$38.30$268
Sep 9, 2025Horizon Common Inc10% OwnerBuy(P)5$38.30$192
Sep 8, 2025Horizon Common Inc10% OwnerBuy(P)4$38.85$155
Sep 8, 2025Horizon Common Inc10% OwnerBuy(P)10$38.85$389
Sep 8, 2025Horizon Common Inc10% OwnerBuy(P)6$38.85$233
Sep 8, 2025Horizon Common Inc10% OwnerBuy(P)5$38.85$194
Sep 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$39.00$195
Sep 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$39.00$234
Sep 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$39.00$312
Sep 5, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$39.00$156
Sep 4, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$39.45$316
Sep 4, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$39.45$237
Sep 4, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$39.45$197
Sep 4, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$39.45$158
Sep 3, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$40.20$161
Sep 3, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$40.20$241
Sep 3, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$40.20$322
Sep 3, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$40.20$201
Sep 2, 2025Rosenthal Brent DDirectorBuy(P)300$38.00$11K
Sep 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$38.00$304
Sep 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$38.00$190
Sep 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)4$38.00$152
Sep 2, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$38.00$228
Aug 29, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)2$38.00$76
Aug 29, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$38.00$228
Aug 29, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$38.00$304
Aug 29, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$38.00$190
Aug 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$38.00$304
Aug 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)6$38.00$228
Aug 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)2$38.00$76
Aug 28, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)5$38.00$190
Aug 28, 2025Horizon Common Inc10% OwnerBuy(P)5$38.00$190
Aug 28, 2025Horizon Common Inc10% OwnerBuy(P)2$38.00$76
Aug 28, 2025Horizon Common Inc10% OwnerBuy(P)6$38.00$228
Aug 28, 2025Horizon Common Inc10% OwnerBuy(P)8$38.00$304
Aug 27, 2025Brennan Alice CDirectorBuy(P)100$38.00$4K
Aug 27, 2025Stahl MurrayCEO and CIO, Director, 10% OwnerBuy(P)8$38.00$304

Data Source

Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.

Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).