13F stock ownership research
Who owns TER? Teradyne Inc 13F holders and position changes
This reverse-ownership view starts with TER and shows every matching position in SnowballHare's tracked 13F manager universe. It connects holder-level changes with four-quarter history and company research without presenting delayed filings as live ownership.
Deterministic analysis from filing data
TER holder activity in the latest 13F cycle
The latest 13F cycle gives TER a fresh ownership snapshot. 1 active managers reported $369.1M in aggregate value. ARK Invest is the largest tracked holder. The sample is too small for a broad concentration reading.
New, increased, reduced, and exited positions separate the moving pieces. ARK Invest made the largest measured share-count move at -47.2%. These filings describe quarter-end positions and do not confirm what managers held after the reporting date.
Looking back across quarters separates persistence from a single-period move. Holder count remains near the trailing average of 1.0. Aggregate value also moves with quarter-end share prices, so dollar changes do not measure active buying by themselves.
TER becomes easier to judge beside related companies. Related ownership pages include VRSN, PLTR, COIN. Return to TER stock research for financial statements, earnings, and company risks.
Current 13F snapshot
All institutional holders
Every row below links to the manager's full portfolio page. The table contains 1 current or exited observations for TER, ordered by reported market value.
| Holder | Shares | Reported value | Portfolio weight | Share change | Status |
|---|---|---|---|---|---|
| ARK Invest2026-03-31 | 1,245,122 | $369.13M | 2.87% | -47.2% | Reduced |
Quarter-over-quarter activity
Holder changes
New holders 0
- No matching holder in the current tracked quarter.
Increased 0
- No matching holder in the current tracked quarter.
Reduced 1
- ARK Invest$369.13M · -47.2%
Exited holders 0
- No matching holder in the current tracked quarter.
Manager universe
Holder type breakdown
Holder types are a deterministic classification of SnowballHare's small tracked-manager universe, not an SEC legal category. The breakdown helps distinguish concentrated investment firms from diversified institutions and family-office style portfolios.
Rolling filing history
Last 4 quarters
Quarterly totals aggregate only managers with a tracked filing for the period. A change can reflect buying or selling, stock-price movement, a new manager entering the dataset, or a missing comparable filing.
| Quarter | Holders | Reported value | Shares | New | Exits |
|---|---|---|---|---|---|
| 2026-03-31 | 1 | $369.13M | 1,245,122 | 0 | 0 |
| 2025-12-31 | 1 | $456.08M | 2,356,256 | 0 | 0 |
| 2025-09-30 | 1 | $374.7M | 2,722,327 | 0 | 0 |
| 2025-06-30 | 1 | $195.5M | 2,174,187 | 0 | 0 |
Information Technology
How TER compares
- Holders
- 1
- Value
- $2.23B
- Top 5
- 100.0%
- Holders
- 1
- Value
- $454.91M
- Top 5
- 300.5%
- Holders
- 1
- Value
- $414.33M
- Top 5
- 100.0%
Peer pages are selected from the same sector and similar reported company scale when data is available. Compare holder count and concentration, but remember that the same limited manager universe can have very different relevance for different stocks.
Filing interpretation
Common questions about TER institutional ownership
Who is the largest tracked institutional holder of TER?
ARK Invest is the largest active holder in the current TER sample, reporting $369.1M. The TER holder table ranks every matched manager.
Which institution increased its TER position the most?
No increase or new TER position appears in the current tracked cycle. Review the TER change section after the next filing update.
Which institution reduced or exited TER most significantly?
ARK Invest recorded the largest reduction or exit by prior reported value. Compare it with the other TER holder changes.
Did new holders enter or existing holders exit TER?
No new TER holder entered the tracked sample. No tracked TER holder exited. Named managers are shown in the TER activity grid.
How concentrated is tracked ownership in TER?
The TER sample contains too few active managers for a broad concentration conclusion. The TER holder table shows the named positions that are available.
How has tracked ownership in TER changed across four quarters?
The latest cycle has 1 active holders versus 1 in the oldest displayed comparison quarter. The TER four-quarter series separates holder count, shares, and reported value.
What company evidence should be checked alongside TER's 13F changes?
Use the TER stock research page to compare institutional moves with revenue, margins, cash flow, insider filings, earnings, and company risks. A delayed ownership filing should not override newer operating evidence.
Primary-source record
Sources and methodology
Source: SEC EDGAR 13F-HR information tables for the managers SnowballHare currently tracks. Rows are aggregated by manager and ticker, then compared with the prior available filing. The dataset is delayed, partial, and historical by design.
Disclaimer: Historical filing data is not investment advice. Check material facts against original SEC records before acting.