Fulcrum Therapeutics, Inc.

FULCNASDAQHealthcare● Active

$3.46

$-0.24(-6.37%)

Market Cap$186954811

P/E Ratio—

52W High$15.74

52W Low$2.83

Avg Volume1.5M

Open$3.57

Beta2.92

Insider Trades Ownership Employees

Fulcrum Therapeutics, Inc. (FULC) Insider Trading

Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.

SEC EDGAR · FMP · FULC · as of Jun 8, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.00

Buy/Sell (by trades)

Overall sentiment

BEARISH

↑ Buy 0%Active transactions only · RSU vesting excluded100% Sell ↓

Fulcrum Therapeutics, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only

As of Jun 8, 2026

FULC insider buying and selling by quarter

FULC insider selling · FULC insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

8.7M4.3M0

2024 Q1

2024 Q2

2024 Q3

2024 Q4

2025 Q1

2025 Q2

2025 Q4

2026 Q1

Mobile shows last 4Q · Desktop shows full 8Q

▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters

As of Jun 8, 2026

Active insiders

Most active in past 12 months · FULC ceo insider trading

Showing all insiders · Click a card to filter the transactions table below

▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API

Recent insider transactions

FULC executive sell shares · FULC board member insider trading · FULC insider trading SEC filing

Showing 24 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Feb 2, 2026	Gould Robert J Director	Sale	15,000	$10.72	$161K	454,864	Form 4
Jan 2, 2026	Gould Robert J Director	Sale	15,000	$11.87	$178K	469,864	Form 4
Dec 15, 2025	Oltmans Curtis Gale Chief Legal Officer	Sale	3,452	$12.92	$45K	10,252	Form 4
Dec 8, 2025	RA CAPITAL MANAGEMENT, L.P. 10 percent owner	Sale	1,377,020	$13.33	$18.36M⚡	8,852,079	Form 4
Dec 8, 2025	RA CAPITAL MANAGEMENT, L.P. 10 percent owner	Sale	2,706,397	$14.28	$38.65M⚡	6,145,682	Form 4
Dec 8, 2025	RA CAPITAL MANAGEMENT, L.P. 10 percent owner	Sale	91,722	$14.98	$1.37M⚡	6,053,960	Form 4
Nov 19, 2025	Gould Robert J Director	Sale	15,000	$11.03	$165K	484,864	Form 4
May 8, 2025	Tourangeau Greg PAO	Sale	498	$5.06	$3K	14,062	Form 4
Aug 21, 2024	RA CAPITAL MANAGEMENT, L.P. 10 percent owner	Other	8,500,000	$0.00	$9K	3,109,704	Form 4
Jul 3, 2024	Sapir Alex See Remarks · Director	Option	150,000	$3.27	$491K	193,360	Form 4
May 7, 2024	Tourangeau Greg PAO	Sale	236	$7.76	$2K	11,571	Form 4
Mar 8, 2024	Tourangeau Greg Vice President, Finance	Sale	4,884	$11.72	$57K	11,807	Form 4
Mar 4, 2024	Sapir Alex See Remarks · Director	Purchase	43,360	$11.35	$492K	43,360	Form 4
May 10, 2023	Tourangeau Greg PAO	Sale	210	$3.31	$695	15,992	Form 4
Jan 20, 2023	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	1,923,076	$13.00	$25.00M⚡	11,609,704	Form 4
Jan 13, 2023	Gould Robert J Interim President & CEO	Sale	6,766	$15.00	$101K	499,864	Form 4
Jan 4, 2023	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	58,369	$7.80	$455K	9,686,628	Form 4
Jan 4, 2023	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	122,334	$7.03	$860K	9,628,259	Form 4
Dec 27, 2022	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	4,089	$5.99	$25K	9,505,925	Form 4
Dec 19, 2022	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	98,787	$5.90	$583K	9,501,836	Form 4
Dec 16, 2022	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	1,341,420	$5.42	$7.27M⚡	9,403,049	Form 4
Dec 15, 2022	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	237,029	$5.50	$1.30M⚡	8,061,629	Form 4
Dec 14, 2022	RA CAPITAL MANAGEMENT, L.P. Director	Purchase	824,600	$5.46	$4.50M⚡	7,824,600	Form 4
Dec 13, 2022	Third Rock Ventures III, L.P. Director	Other	2,000,000	—	—	1,962,202	Form 4

Gould Robert J

Director

Sale

Date

Feb 2

15,000

Price

$10.72

Value

$161K

View Form 4 on SEC.gov

Gould Robert J

Director

Sale

Date

Jan 2

15,000

Price

$11.87

Value

$178K

View Form 4 on SEC.gov

Oltmans Curtis Gale

Chief Legal Officer

Sale

Date

Dec 15

3,452

Price

$12.92

Value

$45K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

10 percent owner

Sale

Date

Dec 8

1,377,020

Price

$13.33

Value

$18.36M ⚡

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

10 percent owner

Sale

Date

Dec 8

2,706,397

Price

$14.28

Value

$38.65M ⚡

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

10 percent owner

Sale

Date

Dec 8

91,722

Price

$14.98

Value

$1.37M ⚡

View Form 4 on SEC.gov

Gould Robert J

Director

Sale

Date

Nov 19

15,000

Price

$11.03

Value

$165K

View Form 4 on SEC.gov

Tourangeau Greg

PAO

Sale

Date

May 8

498

Price

$5.06

Value

$3K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

10 percent owner

Other

Date

Aug 21

8,500,000

Price

$0.00

Value

$9K

View Form 4 on SEC.gov

Sapir Alex

See Remarks · Director

Option

Date

Jul 3

150,000

Price

$3.27

Value

$491K

View Form 4 on SEC.gov

Tourangeau Greg

PAO

Sale

Date

May 7

236

Price

$7.76

Value

$2K

View Form 4 on SEC.gov

Tourangeau Greg

Vice President, Finance

Sale

Date

Mar 8

4,884

Price

$11.72

Value

$57K

View Form 4 on SEC.gov

Sapir Alex

See Remarks · Director

Purchase

Date

Mar 4

43,360

Price

$11.35

Value

$492K

View Form 4 on SEC.gov

Tourangeau Greg

PAO

Sale

Date

May 10

210

Price

$3.31

Value

$695

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Jan 20

1,923,076

Price

$13.00

Value

$25.00M ⚡

View Form 4 on SEC.gov

Gould Robert J

Interim President & CEO

Sale

Date

Jan 13

6,766

Price

$15.00

Value

$101K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Jan 4

58,369

Price

$7.80

Value

$455K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Jan 4

122,334

Price

$7.03

Value

$860K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Dec 27

4,089

Price

$5.99

Value

$25K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Dec 19

98,787

Price

$5.90

Value

$583K

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Dec 16

1,341,420

Price

$5.42

Value

$7.27M ⚡

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Dec 15

237,029

Price

$5.50

Value

$1.30M ⚡

View Form 4 on SEC.gov

RA CAPITAL MANAGEMENT, L.P.

Director

Purchase

Date

Dec 14

824,600

Price

$5.46

Value

$4.50M ⚡

View Form 4 on SEC.gov

Third Rock Ventures III, L.P.

Director

Other

Date

Dec 13

2,000,000

Price

—

Value

—

View Form 4 on SEC.gov

▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —

About FULC insider trading

FULC insider trades

Fulcrum Therapeutics, Inc. (FULC) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Gould Robert J (Director), RA CAPITAL MANAGEMENT, L.P. (10 percent owner), Oltmans Curtis Gale (Chief Legal Officer). Over the past 12 months, 3 insiders have filed transactions with the SEC. FULC insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Fulcrum Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →

Buy/Sell signal logic

acquisitionOrDisposition field:

A = Acquisition (buy) · D = Disposition (sell)

RSU vesting (M-Exempt) excluded from sentiment

Form 4SEC filing required within 2 business days of any insider transaction

10b5-1Pre-scheduled trading plan that allows insiders to sell on autopilot

Open MktDirect purchase or sale on the open market (excludes awards, options)

Ownership SEC filings Financial statements Price history Forecast & ratings Earnings

Frequently asked questions

FULC insider trading · 5 questions

The insiders of Fulcrum Therapeutics, Inc. (FULC) include executives and directors such as Gould Robert J (Director), RA CAPITAL MANAGEMENT, L.P. (10 percent owner), Oltmans Curtis Gale (Chief Legal Officer), among others. Over the past 12 months, 3 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

FULC board member insider tradingwho are FULC insidersFULC insider rosterFulcrum Therapeutics, Inc. executives insider activity

▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026