Cyteir Therapeutics, Inc.

CYTNASDAQHealthcare

$3.02

$-0.07(-2.27%)

Market Cap$108714262

P/E Ratio—

52W High$3.19

52W Low$1.65

Avg Volume171K

Open$3.03

Beta0.10

Overview

Cyteir Therapeutics, Inc. (CYT) 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 · CYT · as of Jun 9, 2026

Activity summary

Buy transactions

P-Purchase only

Sell transactions

12 Months

Buy/Sell ratio

0.06

Buy/Sell (by trades)

Overall sentiment

BEARISH

↑ Buy 6%Active transactions only · RSU vesting excluded94% Sell ↓

Cyteir 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 9, 2026

CYT insider buying and selling by quarter

CYT insider selling · CYT insider buying stocks · quarterly insider activity

Total insider buying (incl. awards)Total insider selling

900K450K0

2022 Q2

2022 Q3

2022 Q4

2023 Q1

2023 Q2

2023 Q3

2023 Q4

2024 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 9, 2026

Recent insider transactions

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

Showing 45 most recent · Common Stock · Form 4 only

Scroll horizontally to see all columns

Date	Insider	Type	Shares	Price	Value	After trans.	Filing
Mar 4, 2024	Gaiero David G CFO	Option	2,373	$1.69	$4K	102,391	Form 4
Feb 29, 2024	Gaiero David G CFO	Option	4,746	$1.69	$8K	100,018	Form 4
Feb 29, 2024	Gaiero David G CFO	Option	3,239	$1.68	$5K	95,272	Form 4
Mar 4, 2024	RENSCHLER MARKUS MD President and CEO · Director	Option	6,304	$1.69	$11K	1,103,661	Form 4
Feb 29, 2024	RENSCHLER MARKUS MD President and CEO · Director	Option	2,537	$1.20	$3K	1,097,357	Form 4
Feb 29, 2024	RENSCHLER MARKUS MD President and CEO · Director	Option	12,607	$1.69	$21K	1,094,820	Form 4
Feb 14, 2024	George Jean Director	Option	14,150	$1.69	$24K	14,150	Form 4
Feb 9, 2024	Sands Stephen H. Director	Option	12,129	$1.69	$20K	12,129	Form 4
Feb 8, 2024	THERO JOHN F Director	Option	12,828	$1.69	$22K	22,828	Form 4
Feb 6, 2024	Zakrzewski Joseph S Director	Option	14,150	$1.69	$24K	227,439	Form 4
Dec 11, 2023	Gaiero David G CFO	Option	2,373	$1.69	$4K	92,033	Form 4
Dec 11, 2023	Gaiero David G CFO	Option	1,620	$1.68	$3K	89,660	Form 4
Nov 20, 2023	RENSCHLER MARKUS MD President and CEO · Director	Option	2,536	$1.20	$3K	1,082,213	Form 4
Nov 20, 2023	RENSCHLER MARKUS MD President and CEO · Director	Option	6,304	$1.69	$11K	1,079,677	Form 4
Nov 20, 2023	RENSCHLER MARKUS MD President and CEO · Director	Option	27,900	$1.20	$33K	1,073,373	Form 4
Nov 20, 2023	RENSCHLER MARKUS MD President and CEO · Director	Option	56,737	$1.69	$96K	1,045,473	Form 4
Nov 20, 2023	Gaiero David G CFO	Option	21,356	$1.69	$36K	88,040	Form 4
Nov 20, 2023	Gaiero David G CFO	Option	52,584	$1.68	$88K	66,684	Form 4
Jul 19, 2023	Novo Holdings A/S 10 percent owner	Sale	1,900	$2.76	$5K	3,622,136	Form 4
Jul 20, 2023	Novo Holdings A/S 10 percent owner	Sale	100,000	$2.75	$275K	3,522,136	Form 4
Jul 14, 2023	Novo Holdings A/S 10 percent owner	Sale	11,000	$2.74	$30K	3,651,636	Form 4
Jul 17, 2023	Novo Holdings A/S 10 percent owner	Sale	21,100	$2.75	$58K	3,630,536	Form 4
Jul 18, 2023	Novo Holdings A/S 10 percent owner	Sale	6,500	$2.76	$18K	3,624,036	Form 4
Jun 30, 2023	Novo Holdings A/S 10 percent owner	Sale	200,937	$2.63	$529K	3,662,636	Form 4
Jun 26, 2023	Novo Holdings A/S 10 percent owner	Sale	8,437	$1.79	$15K	3,895,551	Form 4

Gaiero David G

CFO

Option

Date

Mar 4

2,373

Price

$1.69

Value

$4K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Feb 29

4,746

Price

$1.69

Value

$8K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Feb 29

3,239

Price

$1.68

Value

$5K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Mar 4

6,304

Price

$1.69

Value

$11K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Feb 29

2,537

Price

$1.20

Value

$3K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Feb 29

12,607

Price

$1.69

Value

$21K

View Form 4 on SEC.gov

George Jean

Director

Option

Date

Feb 14

14,150

Price

$1.69

Value

$24K

View Form 4 on SEC.gov

Sands Stephen H.

Director

Option

Date

Feb 9

12,129

Price

$1.69

Value

$20K

View Form 4 on SEC.gov

THERO JOHN F

Director

Option

Date

Feb 8

12,828

Price

$1.69

Value

$22K

View Form 4 on SEC.gov

Zakrzewski Joseph S

Director

Option

Date

Feb 6

14,150

Price

$1.69

Value

$24K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Dec 11

2,373

Price

$1.69

Value

$4K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Dec 11

1,620

Price

$1.68

Value

$3K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Nov 20

2,536

Price

$1.20

Value

$3K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Nov 20

6,304

Price

$1.69

Value

$11K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Nov 20

27,900

Price

$1.20

Value

$33K

View Form 4 on SEC.gov

RENSCHLER MARKUS MD

President and CEO · Director

Option

Date

Nov 20

56,737

Price

$1.69

Value

$96K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Nov 20

21,356

Price

$1.69

Value

$36K

View Form 4 on SEC.gov

Gaiero David G

CFO

Option

Date

Nov 20

52,584

Price

$1.68

Value

$88K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jul 19

1,900

Price

$2.76

Value

$5K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jul 20

100,000

Price

$2.75

Value

$275K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jul 14

11,000

Price

$2.74

Value

$30K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jul 17

21,100

Price

$2.75

Value

$58K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jul 18

6,500

Price

$2.76

Value

$18K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jun 30

200,937

Price

$2.63

Value

$529K

View Form 4 on SEC.gov

Novo Holdings A/S

10 percent owner

Sale

Date

Jun 26

8,437

Price

$1.79

Value

$15K

View Form 4 on SEC.gov

⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar

1 / 2

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

About CYT insider trading

CYT insider trades

Cyteir Therapeutics, Inc. (CYT) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including CYT. Over the past 12 months, 0 insiders have filed transactions with the SEC. CYT insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.

For Cyteir 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

CYT insider trading · 5 questions

The insiders of Cyteir Therapeutics, Inc. (CYT) include executives and directors such as CYT, among others. Over the past 12 months, 0 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.

CYT board member insider tradingwho are CYT insidersCYT insider rosterCyteir 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 9, 2026