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Cytek Biosciences, Inc.

CTKB Net buying

CIK 0001831915 #2941 in the set updated 18 Sep 2026

Bought (120 mo)

$100.44M

out of their own pocket, the only kind of buying there is

Sold (120 mo)

$10.87M

$2.24M on a plan · $453.84K straight out of an exercise

Sold at will

$8.18M

53 of 75 sales

Net

+$89.57M

+$92.27M against sales at will

By person

19 insiders · 109 transactions

Insider

Role

Bought

Sold

Net

Holding

Of company

Worth

Change

RA CAPITAL MANAGEMENT, L.P. entity

Director

$100.15M (22)

—

+$100.15M

13,888,778

10.69%

$38.61M

+2,635%

Yan Ming

CHIEF TECHNOLOGY OFFICER

—

$5.38M (33)

−$5.38M

4,821,870

3.71%

$13.40M

−40.7%

Jiang Wenbin

PRESIDENT AND CEO

—

$4.67M (23)

−$4.67M

8,227,629

6.33%

$22.87M

+4.0%

Jeanmonod Patrik

CHIEF FINANCIAL OFFICER

—

$581.16K (18)

−$581.16K

97,465

0.0750%

$270.95K

+7.0%

Ball Jack

Director

$51.00K (1)

$235.04K (1) scheduled

−$184.04K

86,678

0.0667%

$240.96K

—

McCombe William D.

Chief Financial Officer

$97.30K (1)

—

+$97.30K

134,693

0.1036%

$374.45K

—

Dion Gisele

Director

$85.00K (1)

—

+$85.00K

5,000

0.0038%

$13.90K

—

Barnett Valerie

CHIEF LEGAL OFFICER

$32.30K (1)

—

+$32.30K

150,012

0.1154%

$417.03K

+1,771%

Poirson Allen

SVP BUS. AND CORP. DEV.

$25.50K (1)

—

+$25.50K

59,981

0.0461%

$166.75K

+50.8%

DENG FENG

Director

—

443,800

0.3414%

$1.23M

—

Holder Michael

Director

—

62,875

0.0484%

$174.79K

—

Imper Vera

Director

—

59,679

0.0459%

$165.91K

—

NEFF DEBORAH J

Director

—

59,679

0.0459%

$165.91K

—

Busque Philippe

SVP, GLOBAL SALES AND SERVICES

—

43,466

0.0334%

$120.84K

—

Chin Richard

Director

—

28,499

0.0219%

$79.23K

—

Williams Paul Christopher

CHIEF OPERATING OFFICER

—

16,473

0.0127%

$45.79K

—

HARDISON DON M

Director

—

15,706

0.0121%

$43.66K

—

Garland Jonathan Todd

Chief Commercial Officer

—

8,763

0.0067%

$24.36K

—

MUIR GLENN P

Director

—

3,086

0.0024%

$8.58K

—

Individual transactions

Insider

Date

Role

Action

Price

Amount

Yan Ming

21 Feb 2023

Chief Technology Officer

Sold after exercise

20,000

$10.94

$218.80K

Ball Jack

14 Nov 2022

Director

Sold after exercise

16,000

$14.69

$235.04K

Show all 109 transactions →

What was left out

Form 4 filings counted 272

Amendments (4/A) skipped 0

Filings about a different issuer 0

Unreadable filings 0

Joint filings 8

Sales on a Rule 10b5-1 plan 20

Sales straight out of an exercise 2

Sales at will 53

Transactions with no price 0

Shares from compensation/vesting 22,121,719

Sales filed before the plan box existed 40

History held since 26 Jul 2021