$CCCC

$3.21 +$0.23 (7.72%) Close

$CCCC Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 123.0M shares outstanding

Who owns CCCC?

By type of holder

Institutions 93.9% Insiders 2.9% Everyone else 3.2%

Concentration Top 10 holders own 51.4%

Morgan Stanley 7.2% · Ra Capital Management, L.P. 6.5%

Institutional ownership

93.9%

+25.2 pts vs last qtr

Institutional holders

144

+21 vs last qtr

Net shares bought

+31.0M

by institutions in Q2 2026

New / sold out

50 / 29

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +5.8M
Squadron Capital Management LLC +5.0M

Biggest sellers in Q2 2026

Susquehanna International Group, LLP SOLD OUT −1.3M
Renaissance Technologies LLC −1.3M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.47M

6 notices from 3 people

Shares covered

231.5K

0.19% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Jay Geldmacher Former rezi ceo $1.9M
Jolie M Siegel Officer $379K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2021–FY2025

+80.0%

+15.84% a year

Each share's claim on the business

−44.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$497K vs $128M

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years49% 3–5 years3% 1–3 years13% Under 1 year34%

Quarterly turnover

30.1%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting CCCC on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
MS Morgan Stanley	8.9M	7.21%	−205.1K (−2.3%)	≤2021	0.0%
Shares held by quarter Peak holding9.1M (Q1'26) Change over 8 quarters+6.5M Share of the company7.210% Morgan Stanley's full portfolio →
RC Ra Capital Management, L.P.	8.0M	6.50%	Unchanged	Q4 '25	0.3%
Shares held by quarter Peak holding8.0M (Q4'25) Change over 8 quarters+3.1M Share of the company6.500% Ra Capital Management, L.P.'s full portfolio →

Morgan Stanley

8.9M

% of company

7.21%

Change vs last qtr

−205.1K (−2.3%)

Held since

≤2021

Ra Capital Management, L.P.

8.0M

% of company

6.50%

Change vs last qtr

Unchanged

Held since

Q4 '25

28 more super investors behind a free account

See every manager holding C4 Therapeutics, Inc., how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CCCC on Form N-PORT; together they hold 16.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$15.2M	3.3M	2.65%	0.00%	June 30, 2026
IR iShares Russell 2000 ETF iShares Trust	$12.1M	2.6M	2.11%	0.01%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$15.2M

% of company

2.65%

% of the fund

0.00%

As of

June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$12.1M

% of company

2.11%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding C4 Therapeutics, Inc. and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
HA Hirsch Andrew Insider	1.1M	0.87%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.870% Hirsch Andrew's insider activity →
AK Anderson Kenneth Carl Insider	531.7K	0.43%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.430% Anderson Kenneth Carl's insider activity →

Hirsch Andrew

Insider

1.1M

% of company

0.87%

Change vs last qtr

—

Held since

—

Anderson Kenneth Carl

Insider

531.7K

% of company

0.43%

Change vs last qtr

—

Held since

—

8 more holders behind a free account

See every insider and 5%+ holder of C4 Therapeutics, Inc..

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