Multiple Activist Pile On Long
In plain terms
When 2+ different activists file 13D on the same stock within 60 days, the pile-on signal is stronger than a single activist alone.
How it works
When two or more distinct activists file 13D on the same target within ~60 days, drift is materially larger than single-activist 13D. Coordinated pressure increases the probability of management capitulation. Reported abnormal returns ~12-15% over 12mo vs ~7% for single-activist events.
Live results
0 times picked on its own · 16 times inside a blend (13 beat the stock) · updated 2026-06-06Data dependencies
- Daily prices
Adjusted-close OHLCV for every US-listed ticker; primary price feed.
- SEC 13d filings
A data feed this strategy reads, refreshed on its normal schedule.
Expected edge
- Reported return
- ~12-15% over 12mo
- Tested over
- T+1 to T+365d
Wong 2020 reports ~12-15% abnormal return over 12mo for pile-on events.
Related families
Activist 13D filing → +12% over 2 years.
When a previously-quiet large shareholder switches to declaring activist intent on a stock, the stock tends to outperform for the next 12 months.
Activist-targeted stocks beat their sector for ~12 months, then give some back as the activist exits — we ride both legs as a pair-trade.
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See which tickers this family is currently firing on, with live signals and rankings.