Castle Biosciences Inc. 13F holders
176 funds reported a position in Castle Biosciences Inc. in their 13F for the quarter ended 30 June 2026, together 27.4 million shares worth $653.8 million. Against the quarter before, 17 opened a position, 78 added, 54 trimmed and 30 sold out; together they sold a net 275,435 shares. The largest holders: BlackRock, Inc., RTW Investments, LP and Principal Financial Group Inc.
Funds holding176-10 on Q1 2026
Shares they held27.4Mworth $653.8 million
Net sold on the quarter275,435 sharesabout $6.6 million at the funds' values
Funds buying to selling95 to 84opened or added, to cut or sold
Opened 17Added 78Held 25Trimmed 54Sold out 30
What each fund did in CSTL against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in CSTL in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
3,241 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 34 reported a position in Castle Biosciences Inc.: 3 opened one, 13 added, 8 trimmed and 4 sold out, a net 39,842 shares sold.
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, 8 reported a position in Castle Biosciences Inc. in a 13F for the quarter ended 30 June 2026. The largest: Geode Capital Management, 795,912 shares worth $19.0 million, 0.0% of its reported book. New this quarter: Point72 Asset Management. In the quarter, 4 funds added or opened a position and 3 trimmed or sold out; together they bought a net 116,948 shares, about $2.8 million 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 |
|---|---|---|---|---|---|---|---|
| Geode Capital Management | 795,912 | $19.0 million | 0.0% | +67,812 | added | 30 June 2026 | 13F |
| Renaissance Technologies | 371,200 | $8.9 million | 0.0% | -161,600 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 357,317 | $8.5 million | 0.0% | +357,317 | new | 30 June 2026 | 13F |
| Citadel Advisors | 265,353 | $6.3 million | 0.0% | +144,376 | added | 30 June 2026 | 13F |
| Millennium Management | 205,369 | $4.9 million | 0.0% | -147,950 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 100,374 | $2.4 million | 0.0% | -148,466 | trimmed | 30 June 2026 | 13F |
| Norges Bank | 60,100 | $1.4 million | 0.0% | held | 30 June 2026 | 13F | |
| FMR LLC | 55,871 | $1.3 million | 0.0% | +5,459 | added | 30 June 2026 | 13F |
Value is what the fund reported.
Read more
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 |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 3,291,963 | 12.01% | $78.5 million | 0.00% | +309,017 | 13F |
| RTW Investments, LP | 2,778,335 | 10.14% | $66.3 million | 0.57% | +20,000 | 13F |
| Principal Financial Group Inc. | 1,726,648 | 6.30% | $41.2 million | 0.02% | -43,229 | 13F |
| Vanguard Capital Management LLC | 1,226,497 | 4.47% | $29.3 million | 0.00% | +48,975 | 13F |
| Acadian Asset Management LLC | 918,668 | 3.35% | $21.9 million | 0.03% | +434,227 | 13F |
| Allianz Asset Management GmbH | 879,258 | 3.21% | $21.0 million | 0.02% | +67,934 | 13F |
| Vanguard Portfolio Management LLC | 840,785 | 3.07% | $20.1 million | 0.00% | -20,986 | 13F |
| Summit Partners Public Asset Management, LLC | 824,872 | 3.01% | $19.7 million | 0.51% | -115,813 | 13F |
| State Street Corp. | 822,079 | 3.00% | $19.6 million | 0.00% | +53,000 | 13F |
| Geode Capital Management, LLC | 795,912 | 2.90% | $19.0 million | 0.00% | +67,812 | 13F |
| Mackenzie Financial Corp. | 793,507 | 2.90% | $18.9 million | 0.02% | +719,396 | 13F |
| Dimensional Fund Advisors LP | 791,085 | 2.89% | $18.9 million | 0.00% | -248,676 | 13F |
| Jefferies Financial Group Inc. | 647,391 | 2.36% | $15.4 million | 0.15% | new | 13F |
| Qube Research & Technologies Ltd | 589,300 | 2.15% | $14.1 million | 0.02% | +29,717 | 13F |
| AIGH Capital Management LLC | 545,101 | 1.99% | $13.0 million | 1.18% | -45,500 | 13F |
| Renaissance Technologies LLC | 371,200 | 1.35% | $8.9 million | 0.01% | -161,600 | 13F |
| Goldman Sachs Group Inc. | 358,397 | 1.31% | $8.5 million | 0.00% | +17,226 | 13F |
| Point72 Asset Management, L.P. | 357,317 | 1.30% | $8.5 million | 0.01% | new | 13F |
| Kennedy Capital Management LLC | 348,371 | 1.27% | $8.3 million | 0.15% | new | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 331,727 | 1.21% | $7.9 million | 0.01% | -45,355 | 13F |
| Morgan Stanley | 329,684 | 1.20% | $7.9 million | 0.00% | -99,250 | 13F |
| Portolan Capital Management, LLC | 328,818 | 1.20% | $7.8 million | 0.29% | -1,021,465 | 13F |
| Panagora Asset Management Inc. | 301,040 | 1.10% | $7.2 million | 0.02% | +78,687 | 13F |
| Allspring Global Investments Holdings, LLC | 292,470 | 1.07% | $7.0 million | 0.01% | +131,807 | 13F |
| Northern Trust Corp. | 285,158 | 1.04% | $6.8 million | 0.00% | +12,057 | 13F |
| Wasatch Advisors LP | 279,349 | 1.02% | $6.7 million | 0.04% | -175,687 | 13F |
| Citadel Advisors LLC | 265,353 | 0.97% | $6.3 million | 0.00% | +144,376 | 13F |
| Kornitzer Capital Management Inc. | 264,235 | 0.96% | $6.3 million | 0.13% | -161 | 13F |
| Silvercrest Asset Management Group LLC | 256,095 | 0.93% | $6.1 million | 0.04% | -12,440 | 13F |
| Charles Schwab Investment Management Inc. | 254,535 | 0.93% | $6.1 million | 0.00% | +12,655 | 13F |
| Advisors Capital Management, LLC | 238,204 | 0.87% | $5.7 million | 0.06% | -10,172 | 13F |
| New York State Common Retirement Fund | 234,746 | 0.86% | $5.6 million | 0.01% | +1,700 | 13F |
| Palisade Capital Management, LP | 231,931 | 0.85% | $5.5 million | 0.27% | -303,953 | 13F |
| Nuveen, LLC | 231,726 | 0.85% | $5.5 million | 0.00% | -290,401 | 13F |
| Bridgeway Capital Management, LLC | 221,338 | 0.81% | $5.3 million | 0.09% | -33,846 | 13F |
| Trexquant Investment LP | 206,111 | 0.75% | $4.9 million | 0.03% | +75,677 | 13F |
| Millennium Management LLC | 205,369 | 0.75% | $4.9 million | 0.00% | -147,950 | 13F |
| Vanguard Fiduciary Trust Co. | 197,494 | 0.72% | $4.7 million | 0.00% | +9,283 | 13F |
| AQR Capital Management LLC | 166,567 | 0.61% | $4.0 million | 0.00% | +101,687 | 13F |
| First Trust Advisors LP | 145,064 | 0.53% | $3.5 million | 0.00% | new | 13F |
| Parkman Healthcare Partners LLC | 144,791 | 0.53% | $3.5 million | 0.35% | +18,641 | 13F |
| Empowered Funds, LLC | 142,338 | 0.52% | $3.4 million | 0.02% | +10,154 | 13F |
| HRT Financial LP | 115,853 | 0.42% | $2.8 million | 0.01% | +99,995 | 13F |
| D. E. Shaw & Co., Inc. | 112,789 | 0.41% | $2.7 million | 0.00% | -99,177 | 13F |
| Man Group plc | 108,761 | 0.40% | $2.6 million | 0.01% | +61,623 | 13F |
| Two Sigma Investments, LP | 100,374 | 0.37% | $2.4 million | 0.00% | -148,466 | 13F |
| Bank of America Corp. | 98,745 | 0.36% | $2.4 million | 0.00% | +30,935 | 13F |
| Bank of New York Mellon Corp | 98,018 | 0.36% | $2.3 million | 0.00% | +9,364 | 13F |
| Franklin Resources Inc. | 97,733 | 0.36% | $2.3 million | 0.00% | +6,824 | 13F |
| Arrowstreet Capital, Limited Partnership | 92,736 | 0.34% | $2.2 million | 0.00% | +65,594 | 13F |
The 50 largest of the 176 funds that reported a position in CSTL in their 13F for the quarter ended 30 June 2026, by the value each reported.
Read more
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
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 29 October 2026 | 13G/A | Principal Global Investors and 1 other | 1.5 million | 4.9% | 30 September 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 May 2026 | 13G/A | RTW Investments, LP and 3 others | 2.8 million | 9.3% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 May 2026 | 13G/A | Portolan Capital Management, LLC and 3 others | 1.4 million | 4.5% | 31 March 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 17 February 2026 | 13G | RTW Investments, LP and 3 others | 2.1 million | 7.2% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 21 January 2026 | 13G/A | Dimensional Fund Advisors LP and 1 other | 1.1 million | 3.9% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
Read more
Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 18 September 2026 | 125 | $36.78 | SEC |
| 2 September 2026 | 57 | $33.44 | SEC |
| 31 August 2026 | 28 | $33.50 | SEC |
| 20 August 2026 | 1,667 | $32.32 | SEC |
| 17 August 2026 | 23 | $29.62 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.