K2 PRINCIPAL FUND, L.P. SPRY — SILVERBACK THERAPEUTICS INC

Ownership history in K2 PRINCIPAL FUND, L.P.  ·  31 quarters on record

AI Ownership Summary

K2 PRINCIPAL FUND, L.P. reported SILVERBACK THERAPEUTICS INC (SPRY) in 31 quarterly 13F filings from 2024 Q1 through 2026 Q2. Peak portfolio weight reached 3.92% in 2024 Q1. The latest visible filing shows SPRY at 0.03% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this SPRY ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was K2 PRINCIPAL FUND, L.P.'s position in SILVERBACK THERAPEUTICS INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q2

SPRY was reported at 0.03% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
3.92% in 2024 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2026 Q2

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

SPRY stock page K2 PRINCIPAL FUND, L.P. fund profile K2 PRINCIPAL FUND, L.P. full holdings
How K2 PRINCIPAL FUND, L.P. held SPRY — position size vs. price
% of Fund (quarterly)    SPRY price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 18 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 REDUCED — — — 48,000 -327,132 -87.2% 0.03% $384K 2026-08-07 $6.16
2026 Q2 ADDED — — — 375,132 +362,132 +2785.6% 0.22% $3.0M 2026-08-07 $6.16
2026 Q1 REDUCED 97.7% +6.6% ❌ 13,000 -546,697 -97.7% 0.01% $104K 2026-05-14 $7.94
2026 Q1 ADDED — — — 559,697 +378,597 +209.1% 0.31% $4.5M 2026-05-14 $7.94
2025 Q4 ADDED — — — 181,100 +170,900 +1675.5% 0.17% $2.1M 2026-02-13 $8.85
2025 Q4 REDUCED 83.9% -31.1% ✅ 10,200 -53,000 -83.9% 0.01% $119K 2026-02-13 $8.85
2025 Q3 REDUCED 89.8% +16.6% ❌ 63,200 -558,607 -89.8% 0.05% $635K 2025-11-13 $8.41
2025 Q3 ADDED — — — 621,807 +304,681 +96.1% 0.51% $6.2M 2025-11-13 $8.41
2025 Q2 REDUCED 34.7% -44.3% ✅ 317,126 -168,229 -34.7% 0.76% $5.5M 2025-08-14 $14.47
2025 Q1 ADDED — — — 485,355 +473,355 +3944.6% 0.77% $6.1M 2025-05-15 $12.19
2025 Q1 REDUCED 55.6% +38.7% ❌ 12,000 -15,000 -55.6% 0.02% $151K 2025-05-15 $12.19
2024 Q4 REDUCED 74.5% +19.2% ❌ 27,000 -78,800 -74.5% 0.03% $285K 2025-02-14 $12.02
2024 Q3 REDUCED 11.8% -26.8% ✅ 105,800 -14,200 -11.8% 0.22% $1.5M 2024-11-15 $14.01
2024 Q3 REDUCED 95.1% -26.8% ✅ 120,000 -2,341,672 -95.1% 0.25% $1.7M 2024-11-15 $14.01
2024 Q2 ADDED — — — 2,461,672 +2,317,772 +1610.7% 3.90% $20.9M 2024-08-14 $13.00
2024 Q2 REDUCED 93.5% +70.4% ❌ 143,900 -2,075,231 -93.5% 0.23% $1.2M 2024-08-14 $13.00
2024 Q1 ADDED — — — 2,219,131 +2,047,931 +1196.2% 3.92% $22.7M 2024-05-14 $8.98
2024 Q1 REDUCED 94.4% -14.6% ✅ 171,200 -2,883,133 -94.4% 0.30% $1.7M 2024-05-14 $8.98
13 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding SPRY

As of 2026 Q2 — sorted by position size

Pavaki Capital Management LLC 9.61% INVESTMENT MANAGEMENT ASSOCIATES INC /ADV 3Y 0.61% GENERAL AMERICAN INVESTORS CO INC 3Y 7Y 0.54% AMERICAN ASSETS INC 3Y 7Y 0.3% LEVIN CAPITAL STRATEGIES, L.P. 3Y 7Y 0.29% Empire Life Investments Inc. 3Y 7Y 0.21% PEREGRINE CAPITAL MANAGEMENT LLC 3Y 7Y 0.17% Norman Fields, Gottscho Capital Management, LLC 3Y 7Y 0.17% VALLEY FORGE INVESTMENT CONSULTANTS INC ADV 3Y 0.17% nVerses Capital, LLC 0.16%

FAQ About K2 PRINCIPAL FUND, L.P. and SPRY

These are the practical questions this page is built to answer before you even open the full history table.

How long has K2 PRINCIPAL FUND, L.P. reported owning SPRY?

K2 PRINCIPAL FUND, L.P. reported SPRY across 18 quarterly 13F filings, from 2024 Q1 through 2026 Q2.

What was the largest reported SPRY position in K2 PRINCIPAL FUND, L.P.'s portfolio?

The largest reported portfolio weight for SPRY was 3.92% in 2024 Q1.

What is the latest reported SPRY position on this page?

The most recent filing on this page is 2026 Q2, when K2 PRINCIPAL FUND, L.P. reported 48,000 shares, equal to 0.03% of portfolio, with an estimated market value of $384K.

What does the chart on this SPRY ownership page compare?

The chart compares K2 PRINCIPAL FUND, L.P.'s quarterly SPRY portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did K2 PRINCIPAL FUND, L.P. time their SPRY position?

Based on 13F filing dates vs. subsequent SPRY price moves, K2 PRINCIPAL FUND, L.P. correctly timed 21 out of 30 reported position changes (70%). The annualised alpha on SPRY relative to SPY over the holding period was -10.6%.

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