AB Core Bond ETF
CORB
4 hedge funds and large institutions have $953M invested in AB Core Bond ETF in 2026 Q1 according to their latest regulatory filings, with 1 funds opening new positions, 2 increasing their positions, 1 reducing their positions, and closing their positions.
100% more repeat investments, than reductions
Existing positions increased: 2 | Existing positions reduced: 1
33% more funds holding
Funds holding: 3 → 4 (+1)
10% more capital invested
Capital invested by funds: $868M → $953M (+$85M)
0.55% more ownership
Funds ownership: 98.85% → 99.4% (+0.55%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AllianceBernstein
Nashville,
Tennessee
|
+$87.5M |
| 2 |
KAS
Kestra Advisory Services
Austin,
Texas
|
+$223K |
| 3 |
CAM
Cresset Asset Management
Chicago,
Illinois
|
+$4.93K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Jane Street
New York
|
-$2.68M |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
1
AllianceBernstein
Nashville,
Tennessee
| $952M | +$87.5M | +2,927,534 | +10% |
|
|
CAM
2
Cresset Asset Management
Chicago,
Illinois
| $355K | +$4.93K | +165 | +1% |
|
|
3
Jane Street
New York
| $263K | -$2.68M | -89,726 | -91% |
|
|
KAS
4
Kestra Advisory Services
Austin,
Texas
| $221K | +$223K | +7,467 | New |
|
CORB Hedge Fund Activity: Q1 2026 in Review
4 of the 8,128 institutional investors tracked by Wall St. Rank reported a position in AB Core Bond ETF (CORB) for Q1 2026, worth a combined $953M — up 9.8% from $868M a quarter earlier.
Buyers outnumbered sellers: 1 fund opened new CORB positions and 0 closed out — a net gain of 1 holder — while 2 added to existing stakes and 1 trimmed.
The largest buyer was AllianceBernstein, adding an estimated $87.5M. The largest seller was Jane Street, cutting an estimated $2.68M.
- 4 institutional investors held AB Core Bond ETF (CORB) as of Q1 2026, up from 3 in Q4 2025.
- Funds reported $953M of AB Core Bond ETF stock for Q1 2026, up 9.8% quarter-over-quarter.
- 1 fund opened new AB Core Bond ETF positions in Q1 2026 and 0 closed out, a net change of +1 holder.
- The largest AB Core Bond ETF buyer in Q1 2026 was AllianceBernstein, an estimated $87.5M added.
- The largest AB Core Bond ETF seller in Q1 2026 was Jane Street, an estimated $2.68M sold.
Based on aggregated 13F filings for Q1 2026.