CTKB · Insider trading · 13F holders · Congress trades
Cytek Biosciences, Inc. (CTKB)
Who is buying and selling CTKB: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 2
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
CTKB at a glance
- No open-market insider purchases or sales of CTKB were filed in the last 90 days.
- 2 13F filers hold CTKB among their 50 largest positions, worth $57.3M combined. The biggest bets by portfolio weight are Topline Capital Management, LLC (7.2%) and Hhlr Advisors, Ltd. (3.5%).
- No member of Congress has disclosed a trade in CTKB.
CTKB insider trading
No open-market insider purchases or sales of CTKB were filed in the last 90 days.
Who owns CTKB? Hedge funds and superinvestors
2 13F filers hold CTKB among their 50 largest positions, worth $57.3M combined. The biggest bets by portfolio weight are Topline Capital Management, LLC (7.2%) and Hhlr Advisors, Ltd. (3.5%).
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Hhlr Advisors, Ltd.Hedge fund | 3.5% | $29.5M | 6,657,030 | +0.0% shares | Q2 2026 |
| Topline Capital Management, LLCHedge fund | 7.2% | $27.8M | 6,283,450 | -11.1% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 2). Screen CTKB in the grand portfolio →
CTKB stock trades by members of Congress
No member of Congress has disclosed a trade in CTKB.
CTKB questions and answers
Are insiders buying CTKB stock?
No open-market insider purchases or sales of CTKB were filed in the last 90 days.
Which hedge funds own CTKB?
2 13F filers hold CTKB among their 50 largest positions, worth $57.3M combined. The biggest bets by portfolio weight are Topline Capital Management, LLC (7.2%) and Hhlr Advisors, Ltd. (3.5%).
Has Congress traded CTKB?
No member of Congress has disclosed a trade in CTKB.
Who is the largest holder of CTKB?
Among 13F filers, Hhlr Advisors, Ltd. reports the largest CTKB position, $29.5M (6,657,030 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Topline Capital Management, LLC's: 7.2% of its portfolio.
Cite or share this
Free to use with a link back. The data updates every filing day.