New Positions
8 managers initiated
Top five by reported value
- JANE STREET GROUP, LLC$33.7K
- AMG National Trust Bank$31.3K
- XTX Topco Ltd$8.5K
- DRW Securities, LLC$7.5K
- Point72 Asset Management, L.P.$3.3K
Fibrobiologics Inc NASDAQ NMS - GLOBAL MARKET:FBLG
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
8 new8 added31 reduced16 exited
Total Institutional Holders
47
as of 2025-12-31
Top Holder
VANGUARD GROUP INC
$273.7K
Largest QoQ Increase
RENAISSANCE TECHNOLOGIES LLC
+171,800 sh
Largest QoQ Decrease
Yorkville Advisors Global, LP
-844,103 sh
New Positions(8)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| JANE STREET GROUP, LLC | 149,763 | +149,763 | $33.7K | +$33.7K | — |
| AMG National Trust Bank | 138,960 | +138,960 | $31.3K | +$31.3K | — |
| XTX Topco Ltd | 37,919 | +37,919 | $8.5K | +$8.5K | — |
| DRW Securities, LLC | 33,348 | +33,348 | $7.5K | +$7.5K | — |
| Point72 Asset Management, L.P. | 14,476 | +14,476 | $3.3K | +$3.3K | — |
| Disciplined Equity Management, Inc. | 1,000 | +1,000 | $418 | +$418 | — |
| Allworth Financial LP | 261 | +261 | $59 | +$59 | — |
| IFP Advisors, Inc | 2 | +2 | $1 | +$1 | — |
Added To(8)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| BlackRock, Inc. | 482,401 | +42,628 | $108.5K | -$131.7K | 9.7% |
| Cascade Financial Partners, LLC | 314,581 | +16,500 | $70.7K | -$92.1K | 5.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 348,761 | +59,813 | $78.5K | -$79.4K | 20.7% |
| RENAISSANCE TECHNOLOGIES LLC | 231,600 | +171,800 | $52.1K | +$19.4K | 287.3% |
| BANK OF AMERICA CORP /DE/ | 48,176 | +1 | $10.8K | -$15.5K | 0.0% |
| UBS Group AG | 120,770 | +43,336 | $27.2K | -$15.1K | 56.0% |
| SAXON INTERESTS, INC. | 57,000 | +15,786 | $12.8K | -$11.5K | 38.3% |
| Tower Research Capital LLC (TRC) | 18,109 | +1,147 | $4.1K | -$5.2K | 6.8% |
Reduced(31)
Sold Out(16)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Yorkville Advisors Global, LP | 0 | -844,103 | $0 | -$525.2K | — |
| LUMINUS MANAGEMENT LLC | 0 | -26,629 | $0 | -$345.8K | — |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. | 0 | -350,000 | $0 | -$191.2K | — |
| GTS SECURITIES LLC | 0 | -308,661 | $0 | -$168.5K | — |
| NEW YORK STATE COMMON RETIREMENT FUND | 0 | -30,200 | $0 | -$124.7K | — |
| CITADEL ADVISORS LLC | 0 | -211,139 | $0 | -$115.3K | — |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0 | -69,805 | $0 | -$62.8K | — |
| LPL Financial LLC | 0 | -17,570 | $0 | -$9.6K | — |
| Runnymede Capital Advisors, Inc. | 0 | -10,000 | $0 | -$5.5K | — |
| FMR LLC | 0 | -1,200 | $0 | -$655 | — |
| EverSource Wealth Advisors, LLC | 0 | -52 | $0 | -$28 | — |
| HRT FINANCIAL LP | 0 | -44,145 | $0 | -$24 | — |
| MORGAN STANLEY | 0 | -13 | $0 | -$7 | — |
| True Wealth Design, LLC | 0 | -10 | $0 | -$6 | — |
| SRS Capital Advisors, Inc. | 0 | -2 | $0 | -$1 | — |
| CWM, LLC | 0 | -259 | $0 | $0 | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| VANGUARD GROUP INC | 1,216,341 | $273.7K | -17,440 | -1.4% |
| BlackRock, Inc. | 482,401 | $108.5K | +42,628 | 9.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 348,761 | $78.5K | +59,813 | 20.7% |
| Cascade Financial Partners, LLC | 314,581 | $70.7K | +16,500 | 5.5% |
| MILLENNIUM MANAGEMENT LLC | 288,496 | $64.9K | -157,712 | -35.3% |
| RENAISSANCE TECHNOLOGIES LLC | 231,600 | $52.1K | +171,800 | 287.3% |
| JANE STREET GROUP, LLC | 149,763 | $33.7K | +149,763 | — |
| AMG National Trust Bank | 138,960 | $31.3K | +138,960 | — |
| UBS Group AG | 120,770 | $27.2K | +43,336 | 56.0% |
| STATE STREET CORP | 111,300 | $25.0K | 0 | 0.0% |
| Optivise Advisory Services LLC | 110,100 | $24.8K | 0 | 0.0% |
| Requisite Capital Management, LLC | 109,713 | $24.7K | 0 | 0.0% |
| WILEY BROS.-AINTREE CAPITAL, LLC | 100,000 | $22.5K | 0 | 0.0% |
| Cerity Partners LLC | 93,919 | $21.1K | -32,000 | -25.4% |
| American Institute for Advanced Investment Management, LLP | 88,206 | $19.8K | 0 | 0.0% |
| SAXON INTERESTS, INC. | 57,000 | $12.8K | +15,786 | 38.3% |
| BANK OF AMERICA CORP /DE/ | 48,176 | $10.8K | +1 | 0.0% |
| NORTHERN TRUST CORP | 47,674 | $10.7K | 0 | 0.0% |
| RMR Wealth Builders | 38,360 | $8.6K | 0 | 0.0% |
| XTX Topco Ltd | 37,919 | $8.5K | +37,919 | — |
New & Closed Positions this quarter
Closed Positions
16 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for FBLG against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.