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GERN · Geron Corp

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$1.53 +0.01 (+0.33%)
Market Cap
$976.56M
Shares
642.47M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 259
Total Value: $611,495,336
Total Shares: 477,730,836

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 259 13F filers · Δ vs Mar 31, 2026
Top Holder
10.3%
Sep 2023 → Jun 2026 · range 9.5% – 14.3%
−3.7 pts
Top 5
41.9%
Sep 2023 → Jun 2026 · range 34.2% – 47.0%
−5.1 pts
Top 10
62.2%
Sep 2023 → Jun 2026 · range 54.3% – 68.0%
−5.6 pts
HHI
490
Sep 2023 → Jun 2026 · range 392 – 604
Broadly held−114

Quarterly Activity

vs Mar 31, 2026
New
42
Increased
94
Decreased
61
Sold Out
32
Unchanged
62
Holder count: +10
Institutional value: -10.1%
Shares held: +4.6%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 266
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 886744 CUSIP 374163103 13F (30d) 226 filings 220 filers Visit website Investor relations