Are insiders buying CALC stock?

Yes — 11 distinct insiders have bought CALC (CalciMedica, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Jun 29, 2026.

How much CALC stock have insiders bought?

Insiders have bought a combined $2.1M of CALC across 46 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in CALC?

A cluster buy is two or more distinct CalciMedica, Inc. insiders — officers, directors, or 10% owners — each buying CALC on the open market within a rolling window. CALC has 2 detected cluster buys to date.

Where does this CALC insider trading data come from?

Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

CALC insider buying

2 cluster buys

CalciMedica, Inc. · Healthcare

When two or more insiders at CalciMedica, Inc. buy CALC on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in CALC plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.

Clusters

Distinct insiders

Total bought

$2.1M

Market cap

$15.6M

Detected clusters

May 30 – Sep 18, 2025
Detected Sep 18, 2025
High conviction6 insiders
Total bought
$250.9K
Market cap
$15.6M
Nov 1 – Nov 1, 2024
Detected Nov 1, 2024
High conviction4 insiders
Total bought
$1.1M
Market cap
$16.4M

All notable open-market buys in CALC

Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.

Date	Insider	Shares	Price	Value	Filing
Jun 25, 2026	Middleton Fred A Director, 10% Owner	248,972	$0.80	$200.0K	SEC ↗
Sep 18, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	2,500	$3.07	$7.7K	SEC ↗
Sep 15, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	3,400	$2.68	$9.1K	SEC ↗
Sep 12, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	5,000	$3.12	$15.6K	SEC ↗
Sep 9, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	2,343	$3.15	$7.4K	SEC ↗
Aug 29, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	800	$2.74	$2.2K	SEC ↗
Aug 28, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	9,200	$2.86	$26.3K	SEC ↗
Aug 21, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	3,508	$2.79	$9.8K	SEC ↗
Aug 20, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	2,000	$2.72	$5.4K	SEC ↗
Aug 19, 2025	Hebbar Sudarshancluster Chief Medical Officer	9,563	$2.82	$27.0K	SEC ↗
Aug 19, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	1,000	$2.79	$2.8K	SEC ↗
Aug 15, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	5,076	$2.90	$14.7K	SEC ↗
Aug 15, 2025	Hebbar Sudarshancluster Chief Medical Officer	4,392	$2.79	$12.3K	SEC ↗
Aug 14, 2025	Hebbar Sudarshancluster Chief Medical Officer	1,584	$2.59	$4.1K	SEC ↗
Jul 28, 2025	Stauderman Kenneth A.cluster Chief Scientific Officer	1,000	$3.96	$4.0K	SEC ↗
Jul 22, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	1,500	$3.78	$5.7K	SEC ↗
Jul 21, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	1,500	$3.37	$5.1K	SEC ↗
Jul 21, 2025	Leheny A. Rachelcluster Director, CHIEF EXECUTIVE OFFICER, 10% Owner	1,000	$3.40	$3.4K	SEC ↗
Jul 18, 2025	WILSON ROBERT Ncluster Director	4,500	$2.87	$12.9K	SEC ↗
Jul 18, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	2,000	$2.88	$5.8K	SEC ↗
Jul 14, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	6,500	$2.43	$15.8K	SEC ↗
Jul 14, 2025	Leheny A. Rachelcluster Director, CHIEF EXECUTIVE OFFICER, 10% Owner	2,500	$2.47	$6.2K	SEC ↗
Jul 9, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	5,000	$1.60	$8.0K	SEC ↗
Jul 1, 2025	Stauderman Kenneth A.cluster Chief Scientific Officer	1,000	$1.85	$1.9K	SEC ↗
Jun 26, 2025	Roberts Eric Wcluster Director, CHIEF BUSINESS OFFICER, 10% Owner	4,500	$1.44	$6.5K	SEC ↗

21 earlier buys hidden — sign in free to see the full history.

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CALC insider buying — FAQ

Are insiders buying CALC stock?: Yes — 11 distinct insiders have bought CALC (CalciMedica, Inc.) on the open market, including 2 cluster buys where two or more insiders bought within a rolling window. The most recent qualifying activity was Jun 29, 2026.
How much CALC stock have insiders bought?: Insiders have bought a combined $2.1M of CALC across 46 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in CALC?: A cluster buy is two or more distinct CalciMedica, Inc. insiders — officers, directors, or 10% owners — each buying CALC on the open market within a rolling window. CALC has 2 detected cluster buys to date.
Where does this CALC insider trading data come from?: Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

How we track insider buying in CALC

We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy CALC within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?

This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding CALC.