Shattuck Labs, Inc.
US ˙ NasdaqGS ˙ US82024L1035

SecuritySTTK / Shattuck Labs, Inc.
InstitutionProsight Management, LP
Latest Disclosed Ownership6,543,240 shares
Ownership 9.90%
Prosight Management, LP ownership in STTK / Shattuck Labs, Inc.

2025-11-13 - Prosight Management, LP has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 6,543,240 shares of Shattuck Labs, Inc. (US:STTK). This represents 9.9 percent ownership of the company. In their previous filing dated 2024-11-13 , Prosight Management, LP had reported owning 6,684,900 shares, indicating a decrease of -2.12 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-11-13 2025-11-13 13G/A 6,684,900 6,543,240 -2.12 9.90 -29.29
2024-11-13 2024-11-13 13G/A 5,370,000 6,684,900 24.49 14.00 23.89
2024-08-16 2024-08-16 13G/A 2,782,797 5,370,000 92.97 11.30 91.53
2024-01-02 2024-01-02 13G 2,782,797 2,782,797 0.00 5.90 0.00

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SHATTUCK LABS COM 82024L103 5,004,439 2,622,937 110.14 32,179 270.20 5.2767
2026-02-13 2025-12-31 13F SHATTUCK LABS COM 82024L103 2,381,502 -3,069,693 -56.31 8,692 -33.28 1.7962
2025-11-14 2025-09-30 13F SHATTUCK LABS COM 82024L103 5,451,195 -1,187,740 -17.89 13,028 147.87 3.0385
2025-08-14 2025-06-30 13F SHATTUCK LABS COM 82024L103 6,638,935 0 0.00 5,257 -16.66 1.2819
2025-05-15 2025-03-31 13F SHATTUCK LABS COM 82024L103 6,638,935 0 0.00 6,308 -21.49 2.0725
2025-02-14 2024-12-31 13F SHATTUCK LABS COM 82024L103 6,638,935 960,209 16.91 8,033 -59.47 2.2201
2024-11-14 2024-09-30 13F SHATTUCK LABS COM 82024L103 5,678,726 1,008,726 21.60 19,819 9.94 4.8772
2024-08-14 2024-06-30 13F SHATTUCK LABS COM 82024L103 4,670,000 945,000 25.37 18,026 -45.87 5.3878
2024-05-15 2024-03-31 13F SHATTUCK LABS COM 82024L103 3,725,000 942,203 33.86 33,302 67.84 9.2645
2024-02-14 2023-12-31 13F SHATTUCK LABS COM 82024L103 2,782,797 659,797 31.08 19,841 515.03 7.9658
2023-11-14 2023-09-30 13F SHATTUCK LABS COM 82024L103 2,123,000 13,380 0.63 3,227 -50.99 1.0227
2023-08-14 2023-06-30 13F/A-1 SHATTUCK LABS COM 82024L103 2,109,620 87,952 4.35 6,582 10.75 1.9266
2023-08-14 2023-06-30 13F SHATTUCK LABS COM 82024L103 2,109,620 87,952 6,582 2.0203
2023-05-12 2023-03-31 13F SHATTUCK LABS COM 82024L103 2,021,668 -91,825 -4.34 5,944 22.26 2.8177
2023-02-14 2022-12-31 13F SHATTUCK LABS COM 82024L103 2,113,493 992,717 88.57 4,861 60.64 2.6509
2022-11-14 2022-09-30 13F SHATTUCK LABS COM 82024L103 1,120,776 100,776 9.88 3,026 -26.93 1.6212
2022-08-12 2022-06-30 13F SHATTUCK LABS COM 82024L103 1,020,000 221,282 27.70 4,141 21.69 3.2630
2022-05-16 2022-03-31 13F SHATTUCK LABS COM 82024L103 798,718 538,475 206.91 3,403 53.63 2.1974
2022-02-14 2021-12-31 13F SHATTUCK LABS COM 82024L103 260,243 91,002 53.77 2,215 -35.78 1.3260
2021-11-12 2021-09-30 13F SHATTUCK LABS COM 82024L103 169,241 169,241 3,449 1.8976
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.