Avidity Partners Management LP
SEC Form 13F institutional filer · CIK 0001791827
13F-HR · 11 reported holdings · 2026-03-31
Reported long-US-equity value
$0.04B
Top-10 concentration
97.5%
Avidity Partners Management LP — $36.1M AUM allocation strategy
Avidity Partners Management LP files SEC Form 13F and reports $36.1M of long US equity value across 11 reported holdings for 2026-03-31.
Its largest sector bet is Health Care 95.2%, followed by Consumer Staples 4.8%.
The top 10 holdings account for 97% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
Avidity Partners Management LP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$36.1M
total across 11 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
97% of value
higher = narrower conviction; lower = spread / hedging
Biggest trims (shares)
−$KVUE −133K sh · −$2.29M−$BSX −54.5K sh · −$7.15M−$CNC −49.4K sh · −$2.62M
Exited to nil (held last quarter, gone now)
$MCK ($7.81M last qtr)$A ($5.65M last qtr)$PFE ($5.07M last qtr)$DHR ($3.89M last qtr)$TMO ($3.88M last qtr)
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Health Care Equipment57.3%—
- Managed Health Care25.6%—
- Biotechnology7.7%—
- Personal Care Products4.8%—
- Life Sciences Tools & Services4.6%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
10 of 10 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $MDT | Medtronic plc | 100K | $8.66M | -7.6K | 24.0% |
| $HUM | Humana Inc | 25K | $5.91M | — | 16.4% |
| $DXCM | DexCom Inc | 90K | $5.65M | — | 15.6% |
| $BSX | Boston Scientific Corporation | 60K | $3.77M | -54.5K | 10.4% |
| $GILD | Gilead Sciences Inc | 20K | $2.79M | — | 7.7% |
| $CNC | Centene Corporation | 70K | $2.29M | -49.4K | 6.3% |
| $KVUE | Kenvue Inc | 100K | $1.72M | -133K | 4.8% |
| $PODD | Insulet Corporation | 10K | $1.72M | — | 4.8% |
| $CRL | Charles River Laboratories International Inc | 10K | $1.67M | — | 4.6% |
| $UNH | UnitedHealth Group Incorporated | 3.8K | $1.03M | — | 2.8% |
…and 1 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
Newsletter signup
Free subscription. Daily trading day morning dispatch. No spam.