Haiyan Song

CSG Systems International Inc F5, Inc.Eos Energy Enterprises, Inc.

Insider activity · 24 months2 buys0 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 · 0 buys · 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 · 2 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Companies

▲ Purchases (2 ops.)

€51k

▼ Sales (0 ops.)

—

Latest filing published 15 Sept 2026 for Eos Energy Enterprises, Inc., €34k. Read the official filing

Filing timeline

BuySale

Haiyan Song

Insider track record

Disclosed buys

Disclosed sells

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

No signal scores available.

Haiyan Song: trading record in brief

Haiyan Song is a declared insider at 3 companies; the most frequent names are F5, Inc., CSG Systems International Inc and Eos Energy Enterprises, Inc. Over a trading history stretching from 10 September 2021 to 14 September 2026, the count stands at 13 filings.

Purchases make up the whole of the open-market record (2 purchases, €51k). Buying on the open market means paying the going price with one's own funds, a different act from receiving shares as pay. Other entries cover 6 share grants and 4 option exercises. So far in 2026, the count stands at 2 purchases and no sales.

The record was last updated on 15 September 2026 with an open-market purchase (€17k) in Eos Energy Enterprises, Inc. Between a trade and the moment it shows up on SEC (Form 4), the median delay is 2 days. US insiders must file a Form 4 within two business days of a trade. This summary is built from SEC (Form 4) disclosures alone and does not predict where the share price will go.