Tracked funds
7Unique WSM-tracked managers; table rows may include common shares and optionsMASI
Ticker case file
MASI
MASIMO CORP
$178.78+0.03%NMS
Politicians active
1Recent transactions disclosed via House Clerk / Senate eFD13F notional
$757.6M2026-03-31Top conviction
0.20%max % across any fund's portfolioThis page is the WSM tracked universe, not market-wide ownership. 13F rows are quarterly snapshots, about 45 days delayed; PTR rows are event-based public disclosures.
13F filing
Funds holding this ticker
| Manager | 13F value | Conviction | Class | Option | Reported | SEC filing |
|---|---|---|---|---|---|---|
| FMR LLCOther | $258.1M | 0.01% | SH | — | 2026-03-31 | SEC filing |
| Millennium Management LLCOther | $175.9M | 0.07% | SH | — | 2026-03-31 | SEC filing |
| Balyasny Asset Management L.P.Other | $137.1M | 0.18% | SH | — | 2026-03-31 | SEC filing |
| Millennium Management LLCOther | $51.3M | 0.02% | SH | CALL | 2026-03-31 | SEC filing |
| Citadel Advisors LLCOther | $50M | 0.01% | SH | — | 2026-03-31 | SEC filing |
| Renaissance Technologies LLCOther | $42.6M | 0.07% | SH | — | 2026-03-31 | SEC filing |
| Soros Fund Management LLCOther | $17.9M | 0.20% | SH | — | 2026-03-31 | SEC filing |
| Balyasny Asset Management L.P.Other | $15.1M | 0.02% | SH | CALL | 2026-03-31 | SEC filing |
| Citadel Advisors LLCOther | $4.9M | 0.00% | SH | CALL | 2026-03-31 | SEC filing |
| Citadel Advisors LLCHedge | $4.2M | 0.00% | SH | PUT | 2026-03-31 | SEC filing |
| Bridgewater Associates, LPOther | $337.8K | 0.00% | SH | — | 2026-03-31 | SEC filing |
Politician
Politician PTR activity
| Public date | Politician | Action | Owner | Amount range | Filing |
|---|---|---|---|---|---|
| 2025-10-16 | Kevin Hern HouseholdR · OK-01 | Sale | Self | $15K–$50K | 20032284 |
Combined activity
13F filings + PTR transactions, newest first
- 13F filing2026-05-15FMR LLC · $258.1M↗
- 13F filing2026-05-15Millennium Management LLC · $175.9M↗
- 13F filing2026-05-15Balyasny Asset Management L.P. · $137.1M↗
- 13F filing2026-05-15Millennium Management LLC · $51.3M↗
- 13F filing2026-05-15Citadel Advisors LLC · $50M↗
- 13F filing2026-05-15Soros Fund Management LLC · $17.9M↗
- 13F filing2026-05-15Balyasny Asset Management L.P. · $15.1M↗
- 13F filing2026-05-15Citadel Advisors LLC · $4.9M↗
- 13F filing2026-05-15Citadel Advisors LLC · $4.2M↗
- 13F filing2026-05-15Bridgewater Associates, LP · $337.8K↗
- 13F filing2026-05-14Renaissance Technologies LLC · $42.6M↗
- PTR2025-10-16Kevin Hern Household · Sale · $15K–$50K↗
Often co-held with