JSPR — JASPER THERAPEUTICS INC

Ownership history in CITADEL ADVISORS LLC  ·  19 quarters on record

AI Ownership Summary

CITADEL ADVISORS LLC reported JASPER THERAPEUTICS INC (JSPR) in 19 quarterly 13F filings from 2024 Q1 through 2025 Q4. The latest visible filing shows JSPR at 0.00% 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.

What this JSPR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CITADEL ADVISORS LLC's position in JASPER 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
2025 Q4

JSPR was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.0% in 2024 Q4

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 2025 Q4

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.

JSPR stock page CITADEL ADVISORS LLC fund profile CITADEL ADVISORS LLC full holdings
How CITADEL ADVISORS LLC held JSPR — position size vs. price
% of Fund (quarterly)    JSPR price (quarter-end, indexed to 100)
📋 Quarterly Holdings History 19 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 25,000 -23,200 -48.1% 0.00% $46K 2026-02-14 (Est.) $1.14
2025 Q4 REDUCED 48,200 -541,249 -91.8% 0.00% $88K 2026-02-14 (Est.) $1.14
2025 Q3 ADDED 589,449 +572,049 +3287.6% 0.00% $1.4M 2025-11-14 $1.68
2025 Q3 REDUCED 17,400 -27,100 -60.9% 0.00% $41K 2025-11-14 $1.68
2025 Q3 REDUCED 44,500 -365,944 -89.2% 0.00% $106K 2025-11-14 $1.68
2025 Q2 ADDED 410,444 +392,944 +2245.4% 0.00% $2.3M 2025-08-14 $3.03
2025 Q2 REDUCED 17,500 -357,670 -95.3% 0.00% $97K 2025-08-14 $3.03
2025 Q1 ADDED 375,170 +352,970 +1590.0% 0.00% $1.6M 2025-05-15 $4.87
2025 Q1 ADDED 22,200 +14,200 +177.5% 0.00% $95K 2025-05-15 $4.87
2025 Q1 REDUCED 8,000 -415,610 -98.1% 0.00% $34K 2025-05-15 $4.87
2024 Q4 ADDED 423,610 +410,810 +3209.5% 0.00% $9.1M 2025-02-14 $6.08
2024 Q4 ADDED 12,800 +11,300 +753.3% 0.00% $274K 2025-02-14 $6.08
2024 Q4 REDUCED 1,500 -140,064 -98.9% 0.00% $32K 2025-02-14 $6.08
2024 Q3 ADDED 141,564 +139,964 +8747.8% 0.00% $2.7M 2024-11-14 $22.10
2024 Q3 REDUCED 1,600 -2,300 -59.0% 0.00% $30K 2024-11-14 $22.10
2024 Q3 REDUCED 3,900 -12,310 -75.9% 0.00% $73K 2024-11-14 $22.10
2024 Q1 ADDED 16,210 +12,410 +326.6% 0.00% $476K 2024-05-15 $21.60
2024 Q1 ADDED 3,800 +1,000 +35.7% 0.00% $112K 2024-05-15 $21.60
2024 Q1 INITIATED 2,800 — — 0.00% $82K 2024-05-15 $21.60

🏢 Other funds also holding JSPR

As of 2025 Q4 — sorted by position size

Lion Point Capital, LP 3Y 7Y 4.4% Velan Capital Investment Management LP 3Y 2.83% ACORN CAPITAL ADVISORS, LLC 1.11% SPHERA FUNDS MANAGEMENT LTD. 3Y 7Y 0.17% Knott David M Jr 3Y 0.15% Rock Springs Capital Management LP 3Y 7Y 0.1% Quarry LP 3Y 0.03% BOOTHBAY FUND MANAGEMENT, LLC 3Y 7Y 0.02% ADAR1 Capital Management, LLC 0.02% Carlyle Group Inc. 3Y 7Y 0.01%

FAQ About CITADEL ADVISORS LLC and JSPR

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

How long has CITADEL ADVISORS LLC reported owning JSPR?

CITADEL ADVISORS LLC reported JSPR across 19 quarterly 13F filings, from 2024 Q1 through 2025 Q4.

What was the largest reported JSPR position in CITADEL ADVISORS LLC's portfolio?

The largest reported portfolio weight for JSPR was 0.00% in 2024 Q4.

What is the latest reported JSPR position on this page?

The most recent filing on this page is 2025 Q4, when CITADEL ADVISORS LLC reported 25,000 shares, equal to 0.00% of portfolio, with an estimated market value of $46K.

What does the chart on this JSPR ownership page compare?

The chart compares CITADEL ADVISORS LLC's quarterly JSPR 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.

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