PROK close: $9.32 on 2023-08-21 to $1.48 on 2026-08-19.
Split-adj closes · 240 of 1,027 · price returnⓘ
At a glance
Short interest33.6% of sh out
Days to cover22.4d
13F net flow (QoQ)+0.91%
Top-10 13F concentration77.9%
Next report (est.)2026-11-09
SI 2026-07-31 · 13F 2026-Q1ⓘ
Key fundamentalsFY 2025
Sales (TTM)$818,000
Earnings (TTM)-$84.2M
Net margin−7725.2%
FY ratios · TTM sales/earnings (USD)ⓘ
Trailing returns
YTD−33.9%
1Y−36.5%
3Y−84.1%
Since incept. (ann.)−35.2%
Total return · from 2022-07-13ⓘ
Risk
Ann. volatility (1Y)82.2%
Ann. volatility (3Y)320.1%
Sharpe (1Y)−0.27
Sharpe (3Y)0.35
Max drawdown (1Y)−59.7%
Max drawdown (3Y)−94.8%
Beta (3Y vs SPY)3.03
Daily returns, ann.ⓘ
Top institutional holders13F 2026-Q1
Manager
Shares
Value
% sh out
QoQ
SUVRETTA CAPITAL MANAGEMENT, LLC
12.3M
$22M
—
+0.0%
MORGAN STANLEY
9.0M
$16M
—
+1.6%
MILLENNIUM MANAGEMENT LLC
2.3M
$4M
—
+23.8%
Bleichroeder LP
2.0M
$4M
—
+0.0%
Artia Global Partners LP
1.8M
$3M
—
−1.7%
Hennion & Walsh Asset Management, Inc.
1.6M
$3M
—
+7.2%
BlackRock, Inc.
1.4M
$2M
—
−1.2%
RENAISSANCE TECHNOLOGIES LLC
1.3M
$2M
—
+39.6%
Δ vs 2025-Q4 · % of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.ⓘ
Latest reported quarterslast report 2026-08-10
Period end
Reported
EPS
EPS YoY
Revenue
Rev YoY
2026-06-30
2026-08-10
—
—
$150,000
−32.1%
2026-03-31
2026-05-15
—
—
$226,000
−1.7%
2025-12-31
2026-03-18
—
—
$225,000
+196.1%
2025-09-30
2025-11-10
—
—
$217,000
—
As-reported XBRL · next 2026-11-09 est.ⓘ
Basis & disclosures
EOD closes · nothing imputed or averaged · absent “—”
As-of differs by block · 13F = US long, 45+d lag, LOWER bound
Not investment advice · no recommendation, price target or solicitation
EDGAR + foreign registers · marketstack (licensed EOD) · spzco.com/methodology
