William C. Kirby

Board Director

Director

Cabot CorpTaiwan Fund Inc

Insider activity · 24 months1 buy0 salesCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 0 salesMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 1 buy · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Companies

▲ Purchases (1 ops.)

€2.8M

▼ Sales (0 ops.)

—

Latest filing published 27 Feb 2026 for Taiwan Fund INC, €2.8M. Read the official filing

Filing timeline

BuySale

William C. Kirby

Insider track record

Disclosed buys

Disclosed sells

T+90 hit rate

100%

T+90 mean return

+50.8%

Across 1 buy signal with a settled T+90 return. Return basis: close on the day after publication.

Signal history

No signal scores available.

William C. Kirby: trading record in brief

William C. Kirby, listed as board member, has filed trades across 2 companies (mainly through SEC (Form 4)), most often in Cabot Corp and Taiwan Fund Inc. The record holds 7 filings, for trades running from 8 January 2016 to 26 February 2026.

No open-market sale appears; the market trades are 1 purchase worth €2.8M. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. Outside the open market, there are 6 share grants. So far in 2026, the count stands at 1 purchase and no sales.

Most recently, on 27 February 2026, the filings show an open-market purchase worth €2.8M in Taiwan Fund Inc. The median gap between a trade and its publication by SEC (Form 4) is 1 day. The legal deadline for a Form 4 is two business days after the transaction. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.