Winchester Bancorp, Inc. 13F holders
21 funds reported a position in Winchester Bancorp, Inc. in their 13F for the quarter ended 30 June 2026, together 759,121 shares worth $10.0 million. Against the quarter before, 5 opened a position, 4 added, 3 trimmed and 3 sold out; together they bought a net 8,590 shares. The largest holders: Mangrove Partners Im, LLC, Vanguard Capital Management LLC and Northstar Financial Companies, Inc.
What each fund did in WSBK against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in WSBK in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,405 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 2 reported a position in Winchester Bancorp, Inc.: 0 opened one, 1 added, 0 trimmed and 0 sold out, a net 17,342 shares bought.
| Fund | Change in shares | Shares now | Status | Filing |
|---|---|---|---|---|
| RFG - Bristol Wealth Advisors, LLC | +17,342 | 27,500 | added | 13F |
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 2 reported a position in Winchester Bancorp, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Renaissance Technologies, 31,400 shares worth $412,596, 0.0% of its reported book. Sold out: Millennium Management. In the quarter, 2 funds added or opened a position and 1 trimmed or sold out; together they bought a net 3,974 shares, about $52,236 at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Renaissance Technologies | 31,400 | $412,596 | 0.0% | +400 | added | 30 June 2026 | 13F |
| Geode Capital Management | 29,037 | $381,809 | 0.0% | +15,117 | added | 30 June 2026 | 13F |
| Millennium Management | 0 | $0 | 0.0% | -11,543 | exited | 30 June 2026 | 13F |
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| Mangrove Partners Im, LLC | 186,201 | 24.53% | $2.4 million | 0.16% | no change | 13F |
| Vanguard Capital Management LLC | 178,941 | 23.57% | $2.4 million | 0.00% | -2,572 | 13F |
| Northstar Financial Companies, Inc. | 70,000 | 9.22% | $919,800 | 0.62% | no change | 13F |
| Integrated Wealth Concepts LLC | 57,000 | 7.51% | $748,980 | 0.01% | no change | 13F |
| Oppenheimer & Close, LLC | 50,000 | 6.59% | $657,000 | 0.41% | no change | 13F |
| Renaissance Technologies LLC | 31,400 | 4.14% | $412,596 | 0.00% | +400 | 13F |
| Geode Capital Management, LLC | 29,037 | 3.83% | $381,809 | 0.00% | +15,117 | 13F |
| AllianceBernstein L.P. | 24,656 | 3.25% | $313,131 | 0.00% | no change | 13F |
| Vanguard Fiduciary Trust Co. | 22,708 | 2.99% | $298,383 | 0.00% | +146 | 13F |
| Raymond James Financial Inc. | 20,000 | 2.63% | $262,800 | 0.00% | no change | 13F |
| Steward Partners Investment Advisory, LLC | 19,127 | 2.52% | $251,329 | 0.00% | no change | 13F |
| EagleClaw Capital Managment, LLC | 16,000 | 2.11% | $210,240 | 0.03% | no change | 13F |
| LPL Financial LLC | 15,500 | 2.04% | $203,670 | 0.00% | no change | 13F |
| BlackRock, Inc. | 14,202 | 1.87% | $186,614 | 0.00% | new | 13F |
| RFG - Bristol Wealth Advisors, LLC | 10,158 | 1.34% | $133,476 | 0.03% | new | 13F |
| Sachetta, LLC | 8,000 | 1.05% | $105,120 | 0.05% | new | 13F |
| Eastern Bank | 4,000 | 0.53% | $52,560 | 0.00% | +1,500 | 13F |
| Royal Bank of Canada | 2,000 | 0.26% | $26,000 | 0.00% | new | 13F |
| Tower Research Capital LLC (TRC) | 157 | 0.02% | $2,063 | 0.00% | -137 | 13F |
| UBS Group AG | 18 | 0.00% | $237 | 0.00% | -111 | 13F |
| Osaic Holdings, Inc. | 16 | 0.00% | $210 | 0.00% | new | 13F |
| M3F, Inc. | 0 | 0.00% | $0 | 0.00% | sold out | 13F |
| Millennium Management LLC | 0 | 0.00% | $0 | 0.00% | sold out | 13F |
| Morgan Stanley | 0 | 0.00% | $0 | 0.00% | sold out | 13F |
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Schedule 13D and 13G filed on the name, last twelve months
None in the last twelve months: no holder crossed 5%, changed materially, or filed an annual 13G in the window.