Insider · CIK 0001804708
Haiyan Song
Files at CSGS (CSG SYSTEMS INTERNATIONAL INC), EOSE (Eos Energy Enterprises, Inc.). First filing Sep 15, 2026, latest Sep 15, 2026.
In brief
Haiyan Song files SEC Form 4 as director at EOSE (Eos Energy Enterprises, Inc.), and also at CSGS (CSG SYSTEMS INTERNATIONAL INC). Since Sep 15, 2026, Haiyan Song has reported 1 open-market buy worth $59k and 0 open-market sells worth $0, the latest filed on Sep 15, 2026.
A track record needs three past buys with six months of prices behind them; Haiyan Song has 0, so none is measured yet.
The newest scored trade: bought $59k of EOSE on Sep 11, 2026, filed Sep 15, 2026, scored 30 (weak). In the last 12 months: 1 buy worth $59k and 0 sells worth $0.
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
EOSE: Eos Energy Enterprises, Inc.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | EOSEbuy Eos Energy Enterprises, Inc. | $59k 15,000 shares | - | - |
Transactions
Every row this insider has filed, 5 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 11, 2026 | EOSE Eos Energy Enterprises, Inc. | POpen-market purchase Common Stock | +10,000 | $3.95 | $40k | 10,000 | 28 d ago |
| Sep 14, 2026 | EOSE Eos Energy Enterprises, Inc. | POpen-market purchase Common Stock | +5,000 | $3.84 | $19k | 15,000 | 28 d ago |
| Jul 13, 2026 | EOSE Eos Energy Enterprises, Inc. | AGrant or award Restricted Stock Unitsderivative | +29,980 | $0.00 | $0 | 29,980 | Jul 15, 2026 |
| May 14, 2026 | CSGS CSG SYSTEMS INTERNATIONAL INC | DDisposition to issuer Common Stock | -22,560 | $80.70 | $1.8M | 0 | May 18, 2026 |
| Jun 10, 2025 | CSGS CSG SYSTEMS INTERNATIONAL INC | AGrant or award Common Stock | +3,085 | $0.00 | $0 | 22,560 | Jun 11, 2025 |
Questions about Haiyan Song
Answered from the filings on this page, as of the latest one.
Is Haiyan Song buying or selling?
In the last 12 months Haiyan Song reported 1 open-market buy worth $59k and 0 open-market sells worth $0 on SEC Form 4; the latest was bought $59k of EOSE on Sep 11, 2026. Grants, option exercises and tax withholding are not counted.
How did Haiyan Song's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Haiyan Song has 0.
Where does Haiyan Song file Form 4?
Haiyan Song has filed Form 4 at EOSE (Eos Energy Enterprises, Inc.); CSGS (CSG SYSTEMS INTERNATIONAL INC). A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.