Investors / filer profile

McCombe William D.

Chief Financial Officer

active in 1 company · 1 of 1 positions beat the S&P ~6mo later

Pro
Bought: Pro
Sold: 21
Filings: 1
Companies: 2026-08-18
Last filed

EDGAR · CIK 0001878824 ↗

Track record

How each disclosed position did against the S&P ~6 months later

The outcome curve and every position's resultPro →

+84.1%

median move per position

+10.1%

S&P 500 median, same spans

1 of 1

beat the S&P ~6mo later

Disclosed positions

Estimated from their latest filings — positions may have changed since

Estimated positions from their latest filingsPro →

Activity

Open-market buy & sell volume

BuySell

Total +$97.3K bought

All filings on record

Every Form 4 transaction we track for this filer


CTKBCytek Biosciences, Inc.	Tax $25.2K · 5,401 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Exercise — · 16,049 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Tax $20.5K · 4,392 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Exercise — · 13,051 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Tax $9.9K · 2,111 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Exercise — · 6,320 sh	2026-08-18	—
CTKBCytek Biosciences, Inc.	Tax $13.6K · 3,839 sh	2026-05-18	—
CTKBCytek Biosciences, Inc.	Exercise — · 10,699 sh	2026-05-18	—
CTKBCytek Biosciences, Inc.	Tax $11.1K · 3,122 sh	2026-05-18	—
CTKBCytek Biosciences, Inc.	Exercise — · 8,700 sh	2026-05-18	—

2026-08-18 · Cytek Biosciences, Inc.

$25.2K

—

CTKBExercise

2026-08-18 · Cytek Biosciences, Inc.

16,049

—

2026-08-18 · Cytek Biosciences, Inc.

$20.5K

—

CTKBExercise

2026-08-18 · Cytek Biosciences, Inc.

13,051

—

2026-08-18 · Cytek Biosciences, Inc.

$9.9K

—

CTKBExercise

2026-08-18 · Cytek Biosciences, Inc.

6,320

—

2026-05-18 · Cytek Biosciences, Inc.

$13.6K

—

CTKBExercise

2026-05-18 · Cytek Biosciences, Inc.

10,699

—

2026-05-18 · Cytek Biosciences, Inc.

$11.1K

—

CTKBExercise

2026-05-18 · Cytek Biosciences, Inc.

8,700

—

Newest 10 of 21 filingsEvery Form 4 on record, with outcomesPro →

Outcomes measure each position — the first buy in a stock and every buy within 182 days — against the closing price ~6 months (120 trading days) later, with the S&P 500 over the same span for context. Pre-scheduled 10b5-1 plan trades are excluded from the record. Positions are estimated from the latest reported post-transaction holdings, split-adjusted, at the latest close. Built from SEC Form 4 filings and market prices — past outcomes, not predictions or advice.