$MPLT

$8.17 +$0.51 (6.66%) Close

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

Ownership

13F as of Q2 2026 · 45.4M shares outstanding

Who owns MPLT?

By type of holder

Institutions 57.8% Insiders 0.0% Everyone else 42.2%

Concentration Top 10 holders own 97.5%

Catalyst4, Inc. 60.6% · Novo Holdings A/s 8.1%

Institutional ownership

57.8%

+3.4 pts vs last qtr

Institutional holders

105

+24 vs last qtr

Net shares bought

+1.6M

by institutions in Q2 2026

New / sold out

36 / 12

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Price T Rowe Associates Inc /MD/ +1.3M
Paradigm Biocapital Advisors LP NEW +685.9K

Biggest sellers in Q2 2026

Vestal Point Capital, LP SOLD OUT −420.0K
ADAR1 Capital Management, LLC −348.4K

Who is planning to sell?

Notices of proposed sale, last 12 months

$58.1M

45 notices from 12 people

Shares covered

2.8M

6.16% of the company

Arranged in advance

35%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Novo Holdings A/S Former affiliate $24M
Kroeger Christopher A. Officer $14.2M

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, FY2024–FY2025

+1079.2%

+1079.16% a year

Each share's claim on the business

−91.5%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $37.1M

over 2 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+ years0% 3–5 years0% 1–3 years0% Under 1 year100%

Quarterly turnover

14.4%

of institutional shares changed hands

Top 10 managers, median time held

2 quarters

Super Investors

Investment managers reporting MPLT on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
NH Novo Holdings A/s 13D · 4.9%	3.7M	8.11%	Unchanged	Q4 '25	7.7%
Shares held by quarter Peak holding3.7M (Q4'25) Change over 8 quarters+3.7M Share of the company8.110% Disclosed stake13D · 4.9% Novo Holdings A/s's full portfolio →
FI FCPM III Services B.V.	3.2M	7.10%	Unchanged	Q4 '25	15.4%
Shares held by quarter Peak holding3.2M (Q4'25) Change over 8 quarters+3.2M Share of the company7.100% FCPM III Services B.V.'s full portfolio →

Novo Holdings A/s

13D · 4.9%

3.7M

% of company

8.11%

Change vs last qtr

Unchanged

Held since

Q4 '25

FCPM III Services B.V.

3.2M

% of company

7.10%

Change vs last qtr

Unchanged

Held since

Q4 '25

28 more super investors behind a free account

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

Institutional Funds

Mutual funds and ETFs reporting MPLT on Form N-PORT; together they hold 15.3% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
TR T. Rowe Price Small-Cap Stock Fund, Inc. T. Rowe Price Small-Cap Stock Fund, Inc.	$22.4M	625.0K	1.38%	0.24%	June 30, 2026
TR T. Rowe Price Small-Cap Value Fund, Inc. T. Rowe Price Small-Cap Value Fund, Inc.	$21.7M	605.6K	1.33%	0.21%	June 30, 2026

T. Rowe Price Small-Cap Stock Fund, Inc.

Position value

$22.4M

% of company

1.38%

% of the fund

0.24%

As of

June 30, 2026

T. Rowe Price Small-Cap Value Fund, Inc.

Position value

$21.7M

% of company

1.33%

% of the fund

0.21%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding MapLight 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
C Catalyst4, Inc. 5%+ holder 13D · 49.9%	27.5M	60.61%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company60.610% Disclosed stake13D · 49.9% View the 13D/G filing →

Catalyst4, Inc.

5%+ holder13D · 49.9%

27.5M

% of company

60.61%

Change vs last qtr

—

Held since

—

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