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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

27
Insider
Date
Role
Action
Shares
Price
Amount
McCombe William D.
2 Jun 2025
Chief Financial Officer
Buy
35,000
$2.78
$97.30K
RA CAPITAL MANAGEMENT, L.P.
15 Mar 2022
Director
Buy indirect
241,727
$12.27
$2.96M
RA CAPITAL MANAGEMENT, L.P.
14 Mar 2022
Director
Buy indirect
342,143
$12.35
$4.22M
RA CAPITAL MANAGEMENT, L.P.
11 Mar 2022
Director
Buy indirect
337,492
$12.77
$4.31M
RA CAPITAL MANAGEMENT, L.P.
10 Mar 2022
Director
Buy indirect
256,992
$12.95
$3.33M
RA CAPITAL MANAGEMENT, L.P.
9 Mar 2022
Director
Buy indirect
40,154
$12.99
$521.75K
RA CAPITAL MANAGEMENT, L.P.
8 Mar 2022
Director
Buy indirect
245,701
$12.86
$3.16M
RA CAPITAL MANAGEMENT, L.P.
7 Mar 2022
Director
Buy indirect
337,901
$12.61
$4.26M
RA CAPITAL MANAGEMENT, L.P.
4 Mar 2022
Director
Buy indirect
63,662
$12.99
$827.23K
RA CAPITAL MANAGEMENT, L.P.
2 Mar 2022
Director
Buy indirect
138,255
$12.89
$1.78M
RA CAPITAL MANAGEMENT, L.P.
1 Mar 2022
Director
Buy indirect
294,864
$12.98
$3.83M
RA CAPITAL MANAGEMENT, L.P.
28 Feb 2022
Director
Buy indirect
8,746
$12.97
$113.43K
RA CAPITAL MANAGEMENT, L.P.
25 Feb 2022
Director
Buy indirect
18,991
$12.99
$246.70K
RA CAPITAL MANAGEMENT, L.P.
24 Feb 2022
Director
Buy indirect
186,467
$13.03
$2.43M
RA CAPITAL MANAGEMENT, L.P.
23 Feb 2022
Director
Buy indirect
214,922
$13.41
$2.88M
RA CAPITAL MANAGEMENT, L.P.
22 Feb 2022
Director
Buy indirect
214,922
$13.46
$2.89M
RA CAPITAL MANAGEMENT, L.P.
18 Feb 2022
Director
Buy indirect
166,229
$14.12
$2.35M
RA CAPITAL MANAGEMENT, L.P.
17 Feb 2022
Director
Buy indirect
166,229
$14.78
$2.46M
RA CAPITAL MANAGEMENT, L.P.
16 Feb 2022
Director
Buy indirect
166,200
$14.98
$2.49M
RA CAPITAL MANAGEMENT, L.P.
15 Feb 2022
Director
Buy indirect
166,200
$14.99
$2.49M
RA CAPITAL MANAGEMENT, L.P.
14 Feb 2022
Director
Buy indirect
166,229
$14.72
$2.45M
RA CAPITAL MANAGEMENT, L.P.
27 Jul 2021
Director
Buy indirect
187,214
$17.00
$3.18M
RA CAPITAL MANAGEMENT, L.P.
27 Jul 2021
Director
Buy indirect
2,762,786
$17.00
$46.97M
Poirson Allen
22 Jul 2021
SVP Marketing and Corp. Dev.
Buy
1,500
$17.00
$25.50K
Dion Gisele
22 Jul 2021
Director
Buy
5,000
$17.00
$85.00K
Ball Jack
22 Jul 2021
Director
Buy
3,000
$17.00
$51.00K
Barnett Valerie
22 Jul 2021
General Counsel
Buy
1,900
$17.00
$32.30K
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