Compass Therapeutics CMPX Insider Ownership

NASDAQ CMPX
$0.81 -0.02 (-2.26%)
At close: Oct 21, 2026 · 4:00 PM EDT

Insider Holdings by Owner

10.87Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
4.14%
▲+0.0013% pp QoQ
Shares Held by Insiders
7.72Mn
filed for Sep 2026
▲+0.03% QoQ
Shares Outstanding
186.80Mn
186,800,000 shares
Direct Holdings
7.72Mn
Indirect: 0
Net Shares Traded (QoQ)
+2.50K
net buying in Sep 2026
Insiders Holding Shares
5
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Across the past 12 months, open-market trades by Compass Therapeutics insiders were all purchases, totaling $96,850 (62.5K shares).

Form 4 Holdings

Insiders Holding CMPX

Insiders 5
Shares held 10.87Mn
Of outstanding 5.82%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Thomas J. Schuetz Chief Executive Officer 6,603,336 0 6,603,336 60.8% 10 Feb, 2026
2 Vered Bisker-Leib Chief Executive Officer 3,124,426 0 3,124,426 28.7% 09 Feb, 2024
3 Barry Shin Cfo 525,000 0 525,000 4.8% 05 Jan, 2026
4 Neil Lerner Chief Accounting Officer 420,000 0 420,000 3.9% 02 Oct, 2026
5 Jonathan Anderman General Counsel 196,000 0 196,000 1.8% 30 Apr, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

143 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
01 Oct, 2026 Neil Lerner Chief Accounting Officer Acquired P 20,000 $0.92 $18.40K 420,000 Direct
24 Sep, 2026 Neil Lerner Chief Accounting Officer Acquired P 2,500 $1.14 $2.85K 400,000 Direct
29 Apr, 2026 Neil Lerner Chief Accounting Officer Acquired P 15,000 $1.89 $28.35K 397,500 Direct
29 Apr, 2026 Jonathan Anderman General Counsel Acquired P 25,000 $1.89 $47.25K 196,000 Direct
29 Apr, 2026 Jonathan Anderman General Counsel Acquired A 25,000 $1.89 $47.25K 196,000 Direct
29 Apr, 2026 Neil Lerner Chief Accounting Officer Acquired A 15,000 $1.89 $28.35K 397,500 Direct
08 Feb, 2026 Thomas J. Schuetz Chief Executive Officer Disposed F 36,687 $6.52 $239.20K 6,603,336 Direct
09 Jan, 2026 Thomas J. Schuetz Chief Executive Officer Disposed F 46,777 $5.35 $250.26K 6,640,023 Direct
02 Jan, 2026 Ellen Chiniara Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 Carl L Gordon Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 James P Boylan Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 Arjun Prasad Chief Commercial Officer Acquired A 1,000,000 $0.00 $0 1,000,000 Direct
02 Jan, 2026 Mary Ann Gray Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 Richard S Lindahl Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 Barry Shin Cfo Acquired A 125,000 $5.17 $646.25K 525,000 Direct
02 Jan, 2026 Neil Lerner Chief Accounting Officer Acquired A 62,500 $5.17 $323.13K 382,500 Direct
02 Jan, 2026 Thomas J. Schuetz Ceo Acquired A 250,000 $5.17 $1.29Mn 6,686,800 Direct
02 Jan, 2026 Philip Ferneau Director Acquired A 90,000 $0.00 $0 90,000 Direct
02 Jan, 2026 Cynthia Sirard Chief Medical Officer Acquired A 1,000,000 $0.00 $0 1,000,000 Direct
02 Jan, 2026 Jonathan Anderman General Counsel Acquired A 150,000 $5.17 $775.50K 171,000 Direct