Reporting owner · CIK 0001999165
Collins Spencer
SEC Form 4 history across 1 companies, 8 transactions and 1 filings.
CLOChief Legal OfficerARM HOLDINGS PLC UK
Open-market transaction mix0% buys0 buys · 8 sales
Available history · May 11, 2026 – May 11, 2026
Latest insider transactions
Form 4 filings from available history.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$1.04MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$1.57MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$2.37MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$2.25MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$2.06MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$1.12MView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$385kView disclosure → | |
ARMARM HOLDINGS PLC UK | Collins SpencerCLO | S · saleSEC filing ↗ | -$173kView disclosure → |
Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
sale at ARM HOLDINGS PLC UK on May 11, 2026 valued at $1,043,319.
Review SEC filingLatest buy
No open-market insider purchase is available.
Monthly open-market activity
Last 1 reported months · purchases and sales
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| May 2026 | 0 | 8 | $0.00 | $11,001,747.01 | -$11,001,747.01 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size$1.4M
Median P/S size$1.3M
Direct8
Indirect0
May 11, 2026sale
Filing-only signals
Deterministic matches in this insider's history
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
No open-market purchases in available history
A 90-day purchase return requires an open-market buy. No eligible purchases are recorded in this history.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
8 observations · May 11, 2026 – May 11, 2026. Window ends at the latest available report, not today.
Selected observation · May 11, 20260 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| May 11, 2026 | 51,125 | May 13, 2026 | View transaction |
| May 11, 2026 | 49,276 | May 13, 2026 | View transaction |
| May 11, 2026 | 43,923 | May 13, 2026 | View transaction |
| May 11, 2026 | 34,108 | May 13, 2026 | View transaction |
| May 11, 2026 | 23,434 | May 13, 2026 | View transaction |
| May 11, 2026 | 12,237 | May 13, 2026 | View transaction |
| May 11, 2026 | 4,866 | May 13, 2026 | View transaction |
| May 11, 2026 | 0 | May 13, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Collins Spencer Insider Activity FAQ
SEC Form 4 context
Who is Collins Spencer?
Collins Spencer is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001999165.
Which companies has Collins Spencer reported transactions for?
ARM HOLDINGS PLC UK
When was Collins Spencer's latest insider buy?
No open-market insider purchase is available for this period.
When was Collins Spencer's latest insider sale?
sale at ARM HOLDINGS PLC UK on May 11, 2026 valued at $1,043,319.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.