Question 1

Which hedge funds and institutional investors hold SIBN?

Accepted Answer

StonkWhisper tracks 13F filings submitted to the SEC by institutional investment managers with over $100 million in assets. The whale tracker for SIBN shows which major funds hold positions, their portfolio weight, share counts, and how those positions changed quarter over quarter.

Question 2

What does conviction level mean for SIBN whale holdings?

Accepted Answer

Conviction level reflects how significant SIBN is within a fund's overall portfolio. A high-conviction position means the manager has allocated a large percentage of their portfolio to SIBN, suggesting strong directional confidence in the stock.

Question 3

How current is the whale data for SIBN?

Accepted Answer

Institutional 13F filings are required within 45 days of each calendar quarter end (March 31, June 30, September 30, December 31). StonkWhisper processes filings as they are published on SEC EDGAR, so data reflects the most recently reported quarter.

Question 4

What do quarter-over-quarter changes tell me about SIBN?

Accepted Answer

QoQ changes for SIBN show whether institutional managers are increasing, decreasing, initiating, or exiting their positions. New positions and significant increases can signal growing institutional conviction, while exits or decreases may indicate waning confidence.

Manager	Shares	Value	% of Portfolio	Manager AUM
American Century	2.5M	$31.7M	0.0%	$194.3B
Cadian	1.9M	$23.8M	2.9%	$821.2M
State Street	1.1M	$14.3M	0.0%	$2896.4B
GGH	1.0M	$13.2M	0.2%	$8.3B
Point72	840.3K	$10.6M	0.0%	$78.1B
First Eagle	638.7K	$8.1M	0.0%	$59.0B
Renaissance Tech	472.6K	$6.0M	0.0%	$63.9B
Millennium	369.3K	$4.7M	0.0%	$240.3B
DE Shaw	189.0K	$2.4M	0.0%	$166.3B
Citadel	188.2K	$2.4M	0.0%	$618.5B
Marshall Wace	167.0K	$2.1M	0.0%	$100.4B
Geode Capital	135.8K	$1.7M	0.0%	$1607.5B
Tudor	130.1K	$1.6M	0.0%	$53.9B
Man Group	82.8K	$1.0M	0.0%	$55.1B
Two Sigma	58.1K	$734K	0.0%	$123.9B
Wellington	54.5K	$689K	0.0%	$535.5B
Brevan Howard	43.1K	$545K	0.0%	$11.3B
Citadel	39.3K	$496K	0.0%	$618.5B
DFA	39.0K	$493K	0.0%	$481.4B
BlackRock	39.0K	$492K	—	$5723.5B
Invesco	34.2K	$431K	0.0%	$653.3B
Franklin Templeton	22.4K	$282K	0.0%	$408.3B
Northern Trust	1.1K	$14K	—	$756.6B
Acadian	63.2K	$795	0.0%	$70.5M
Fidelity (FMR)	22	$281	—	$1898.4B
AQR Capital	2	$25	—	$218.4B

SIBN

Who Holds SIBN

Changes This Quarter