Woodline Partners LP and AllianceBernstein LP: where the books meet
At Q2 2026, at least 40% of the two 13F books was the same, across 232 stocks both listed, against 11% at Q4 2019. Overlap is the smaller of each shared stock’s two weights, added up: the part of one book that could be swapped for the other’s without a trade.
- Q4 2019: 11%, 40 in both
- Q1 2020: 11%, 48 in both
- Q2 2020: 11%, 52 in both
- Q3 2020: 11%, 53 in both
- Q4 2020: 10%, 52 in both
- Q1 2021: 12%, 67 in both
- Q2 2021: 11%, 62 in both
- Q3 2021: 14%, 85 in both
- Q4 2021: 16%, 90 in both
- Q1 2022: 11%, 79 in both
- Q2 2022: 13%, 85 in both
- Q3 2022: 15%, 100 in both
- Q4 2022: 14%, 105 in both
- Q1 2023: 17%, 115 in both
- Q2 2023: 18%, 119 in both
- Q3 2023: 16%, 122 in both
- Q4 2023: 16%, 126 in both
- Q1 2024: 17%, 139 in both
- Q2 2024: 15%, 125 in both
- Q3 2024: 16%, 124 in both
- Q4 2024: 26%, 190 in both
- Q1 2025: 29%, 205 in both
- Q2 2025: 31%, 207 in both
- Q3 2025: 34%, 210 in both
- Q4 2025: 38%, 220 in both
- Q1 2026: 37%, 213 in both
- Q2 2026: 40%, 232 in both
Only quarters both managers filed. Where either filing has more positions than are read each quarter, a stock both hold below that range is not counted, so the figure is a floor.
What the overlap is made of, Q2 2026
Stocks both listed, by the smaller of the two weights. A weight is the stock’s share of that manager’s reported book, which says how large the position is, not how strongly it is held.
| Stock | Woodline Partners LP | AllianceBernstein LP |
|---|---|---|
| Nvidia Corp(NVDA) | 3.3%Added | 5.6%Trimmed |
| Apple Inc(AAPL) | 2.9%Added | 3.6%Added |
| Microsoft Corp(MSFT) | 1.9%Added | 3.2%Trimmed |
| Amazon Com Inc(AMZN) | 1.8%Trimmed | 2.6%Trimmed |
| Facebook Inc(META) | 1.4%Added | 2.3%Trimmed |
| Broadcom Inc(AVGO) | 1.4%Added | 2.4%Trimmed |
| Alphabet Inc(GOOG) | 1.1%Added | 3.5%Trimmed |
| Alphabet Inc(GOOGL) | 1.2%Trimmed | 1.1%Added |
| Lilly Eli & Co(LLY) | 0.9%Added | 1.3%Trimmed |
| Progressive Corp(PGR) | 0.6%Added | 0.6%Trimmed |
| Berkshire Hathaway Inc Del(BRK-B) | 0.6%Added | 0.6%Trimmed |
| Johnson & Johnson(JNJ) | 0.8%Trimmed | 0.6%Trimmed |
| JPMorgan Chase & Co.(JPM) | 0.6%Added | 0.5%Added |
| Home Depot Inc(HD) | 0.5%Added | 0.7%Added |
| Applied Matls Inc(AMAT) | 0.5%Trimmed | 0.6%Trimmed |
| Merck & Co. Inc(MRK) | 0.4%Added | 0.5%Added |
| Tesla Inc(TSLA) | 0.8%Added | 0.4%Added |
| Raytheon Technologies Corp(RTX) | 0.4%Added | 0.6%Added |
| Unitedhealth Group Inc(UNH) | 0.4%Added | 0.7%Added |
| Costco WHSL Corp New(COST) | 0.4%Added | 0.8%Trimmed |
and 212 smaller ones
Moved different ways in Q2 2026
Stocks one manager started or added to while the other trimmed or sold out, between the same two quarter ends. A 13F shows the quarter ends, never when in between anything was bought or sold, or why.
- Nvidia Corp(NVDA)Woodline Partners LP added; AllianceBernstein LP trimmed
- Alphabet Inc(GOOG)Woodline Partners LP added; AllianceBernstein LP trimmed
- Microsoft Corp(MSFT)Woodline Partners LP added; AllianceBernstein LP trimmed
- Broadcom Inc(AVGO)Woodline Partners LP added; AllianceBernstein LP trimmed
- Facebook Inc(META)Woodline Partners LP added; AllianceBernstein LP trimmed
- Visa Inc(V)Woodline Partners LP added; AllianceBernstein LP trimmed
- Lilly Eli & Co(LLY)Woodline Partners LP added; AllianceBernstein LP trimmed
- Alphabet Inc(GOOGL)Woodline Partners LP trimmed; AllianceBernstein LP added
- Netflix Inc(NFLX)Woodline Partners LP added; AllianceBernstein LP trimmed
- Costco WHSL Corp New(COST)Woodline Partners LP added; AllianceBernstein LP trimmed
- TJX Cos Inc New(TJX)Woodline Partners LP added; AllianceBernstein LP trimmed
- Progressive Corp(PGR)Woodline Partners LP added; AllianceBernstein LP trimmed
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