$GERN

$1.15 +$0.03 (2.68%) Close

$GERN Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 642.5M shares outstanding

Who owns GERN?

By type of holder

Institutions 74.0% Insiders 0.1% Everyone else 26.0%

Concentration Top 10 holders own 46.1%

Ra Capital Management, L.P. 6.7% · BlackRock, Inc. 7.6%

Institutional ownership

74.0%

-3.4 pts vs last qtr

Institutional holders

257

+1 vs last qtr

Net shares bought

−22.1M

by institutions in Q2 2026

New / sold out

36 / 35

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Citadel Advisors LLC +7.5M
Vanguard Portfolio Management LLC +6.1M

Biggest sellers in Q2 2026

Deep Track Capital, LP SOLD OUT −31.7M
Ra Capital Management, L.P. −21.0M

Who is planning to sell?

Notices of proposed sale, last 12 months

$27.4K

1 notice from 1 person

Shares covered

20.0K

0.00% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

James Ziegler Officer $27.4K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2014–FY2025

+334.2%

+17.72% a year

Each share's claim on the business

−77.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $132M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years62% 3–5 years3% 1–3 years25% Under 1 year10%

Quarterly turnover

15.6%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting GERN on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
RC Ra Capital Management, L.P.	42.8M	6.66%	−21.0M (−32.9%)	≤2021	0.5%
Shares held by quarter Peak holding63.8M (Q4'25) Change over 8 quarters+10.5M Share of the company6.660% Ra Capital Management, L.P.'s full portfolio →
B BlackRock, Inc.	49.1M	7.64%	+1.8M (+3.8%)	≤2021	0.0%
Shares held by quarter Peak holding50.0M (Q2'25) Change over 8 quarters+479.0K Share of the company7.640% BlackRock, Inc.'s full portfolio →

Ra Capital Management, L.P.

42.8M

% of company

6.66%

Change vs last qtr

−21.0M (−32.9%)

Held since

≤2021

BlackRock, Inc.

49.1M

% of company

7.64%

Change vs last qtr

+1.8M (+3.8%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Geron Corporation, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting GERN on Form N-PORT; together they hold 21.7% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$27.9M	21.8M	3.40%	0.26%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$26.2M	20.4M	3.18%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$27.9M

% of company

3.40%

% of the fund

0.26%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$26.2M

% of company

3.18%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Geron Corporation and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
SJ Scarlett John A Insider	262.5K	0.04%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.040% Scarlett John A's insider activity →
SR Spiegel Robert J. Insider	212.2K	0.03%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.030% Spiegel Robert J.'s insider activity →

Scarlett John A

Insider

262.5K

% of company

0.04%

Change vs last qtr

—

Held since

—

Spiegel Robert J.

Insider

212.2K

% of company

0.03%

Change vs last qtr

—

Held since

—

5 more holders behind a free account

See every insider and 5%+ holder of Geron Corporation.

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