Acadia Pharmaceuticals ACAD Insider Ownership

NASDAQ ACAD

$20.44 +0.64 (+3.23%)

At close: Oct 20, 2026 · 4:00 PM EDT

Insider Holdings by Owner

40.06Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

23.16%

▼-0.098% pp QoQ

Shares Held by Insiders

39.87Mn

filed for Sep 2026

▼-0.42% QoQ

Shares Outstanding

172.13Mn

172,132,442 shares

Direct Holdings

481.92K

Indirect: 39.38Mn

Net Shares Traded (QoQ)

-169.16K

net selling in Sep 2026

Insiders Holding Shares

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

Updated Oct 10, 2026

Over the past 12 months, Acadia Pharmaceuticals insiders sold $3.4 million of stock on the open market (141.64K shares) and made no open-market purchases.

A count shows 6 insiders selling ACAD stock on the open market over the past 12 months and none buying.
Mark C. Schneyer (EVP, Chief Financial Officer) sold the most Acadia Pharmaceuticals stock on the open market over the past 12 months, $1.13 million (44K shares), most recently on August 6, 2026.
Beyond open-market trades, insiders at Acadia Pharmaceuticals received 37.24K shares in stock awards and acquired 175.75K shares through option exercises and conversions in the last 12 months.
According to Business Quant data, insiders at Acadia Pharmaceuticals reported 39.87Mn shares in total in their latest Form 4 filings, or 23.16% of the 172.13Mn shares outstanding; that total is down 0.42% from 40.04Mn shares at the end of Q2 2026 and down 0.35% from 40.01Mn shares at the end of Q3 2025.
Of the 39.87Mn shares held by Acadia Pharmaceuticals insiders, 481.92K shares (1.21%) are held directly and 39.38Mn shares (98.79%) indirectly, through trusts, partnerships, family members and other entities.
The insider holdings in Acadia Pharmaceuticals belong to 14 insiders who have reported on Form 4 within the past two years.
Acadia Pharmaceuticals' three biggest insider holders are Baker Bros. Advisors LP (Director and 10% owner, 39.49Mn shares), Mark C. Schneyer (EVP, Chief Financial Officer, 67.83K shares) and Brendan Teehan (EVP, COO, Head of Commercial, 62.1K shares), based on their latest Form 4 filings.
Of the shares held by ACAD insiders, 99.05% belong to Baker Bros. Advisors LP.
A total of 31 Form 4 filings with transactions in Acadia Pharmaceuticals stock were made over the past 12 months, by 13 insiders.
Insider figures for ACAD include Form 4 filings through August 6, 2026.

Form 4 Holdings

Insiders Holding ACAD

Insiders 17

Shares held 40.06Mn

Of outstanding 23.27%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Bros. Advisors Lp Baker	Director, TenPercentOwner	0	39,384,587	39,384,587	98.3%	02 Jun, 2026
2	Stephen Davis	Ceo	186,555	0	186,555	0.5%	20 Aug, 2024
3	Mark C. Schneyer	Evp, Chief Financial Officer	67,828	0	67,828	0.2%	06 Aug, 2026
4	Brendan Teehan	Evp, Coo, Head Of Commercial	62,105	0	62,105	0.2%	19 Nov, 2024
5	Srdjan R. Stankovic	President	61,234	0	61,234	0.2%	22 Nov, 2022
6	Austin D. Kim	Evp,General Counsel, Secretary	46,901	0	46,901	0.1%	09 Jan, 2024
7	Daniel B Soland	Director	44,041	0	44,041	0.1%	02 Jun, 2025
8	Edmund Harrigan	Director	43,148	0	43,148	0.1%	01 Jun, 2026
9	Elizabeth A. Garofalo	Director	33,489	0	33,489	0.1%	01 Jun, 2026
10	Adora Ndu	Director	32,908	0	32,908	0.1%	01 Jun, 2026
11	Laura Brege	Director	23,202	0	23,202	0.1%	01 Jun, 2026
12	Elizabeth H.Z. Thompson	Evp, Head Of Research Dev	18,994	0	18,994	0.0%	31 Jul, 2026
13	Adams Catherine Owen	Chief Executive Officer	14,803	0	14,803	0.0%	26 Mar, 2026
14	James Kihara	Principal Accounting Officer	13,088	0	13,088	0.0%	29 Jun, 2026
15	James M Daly	Director	12,148	0	12,148	0.0%	01 Jun, 2026
16	Jennifer J Rhodes	Evp, Chief Legal Officer, Sec	11,280	0	11,280	0.0%	26 Mar, 2026
17	Jonathan Poole	Director	2,010	0	2,010	0.0%	01 Jun, 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

1,735 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Acquired M	5,849	$17.84	$104.35K	73,677	Direct
05 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Disposed S	5,849	$29.00	$169.64K	67,828	Direct
06 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Acquired M	14,292	$17.84	$254.97K	82,120	Direct
06 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Disposed S	5,000	$29.00	$145.00K	77,120	Direct
06 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Disposed S	9,292	$29.34	$272.60K	67,828	Direct
05 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Disposed M	5,849	$0.00	$0	74,715	Direct
06 Aug, 2026	Mark C. Schneyer	Evp, Chief Financial Officer	Disposed M	14,292	$0.00	$0	60,423	Direct
29 Jul, 2026	Elizabeth H.Z. Thompson	Evp, Head Of Research Dev	Acquired M	32,272	—	—	35,552	Direct
30 Jul, 2026	Elizabeth H.Z. Thompson	Evp, Head Of Research Dev	Disposed S	16,508	$26.13	$431.35K	19,044	Direct
30 Jul, 2026	Elizabeth H.Z. Thompson	Evp, Head Of Research Dev	Disposed S	50	$26.17	$1.31K	18,994	Direct
29 Jul, 2026	Elizabeth H.Z. Thompson	Evp, Head Of Research Dev	Disposed M	32,272	$0.00	$0	32,272	Direct
26 Jun, 2026	James Kihara	Principal Accounting Officer	Disposed S	11,421	$26.08	$297.91K	13,088	Direct
29 May, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired A	18,622	$0.00	$0	3,677,357	Indirect
29 May, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired A	18,622	$0.00	$0	39,384,587	Indirect
29 May, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired A	32,008	$0.00	$0	32,008	Indirect
29 May, 2026	Bros. Advisors Lp Baker	Director, TenPercentOwner	Acquired A	32,008	$0.00	$0	32,008	Indirect
29 May, 2026	Edmund Harrigan	Director	Acquired M	8,107	—	—	43,148	Direct
29 May, 2026	Adora Ndu	Director	Acquired M	8,107	—	—	32,908	Direct
29 May, 2026	Laura Brege	Director	Acquired M	8,107	—	—	23,202	Direct
29 May, 2026	James M Daly	Director	Acquired M	8,107	—	—	12,148	Direct

Showing 1 to 20 of 1,735 transactions