Question 1

Which hedge funds and institutional investors hold MASS?

Accepted Answer

StonkWhisper tracks 13F filings submitted to the SEC by institutional investment managers with over $100 million in assets. The whale tracker for MASS 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 MASS whale holdings?

Accepted Answer

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

Question 3

How current is the whale data for MASS?

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 MASS?

Accepted Answer

QoQ changes for MASS 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
ARK Invest	1.9M	$11.9M	0.1%	$12.9B
First Eagle	803.6K	$4.9M	0.0%	$59.0B
State Street	625.9K	$3.8M	0.0%	$2896.4B
Renaissance Tech	230.2K	$1.4M	0.0%	$63.9B
Millennium	142.4K	$872K	0.0%	$240.3B
Geode Capital	97.7K	$598K	—	$1607.5B
American Century	55.9K	$342K	0.0%	$194.3B
Citadel	54.0K	$330K	0.0%	$618.5B
Two Sigma	44.1K	$270K	0.0%	$123.9B
DFA	13.2K	$81K	—	$481.4B
BlackRock	1.3K	$8K	—	$5723.5B
Northern Trust	446	$3K	—	$756.6B
AQR Capital	177	$1K	—	$218.4B
Fidelity (FMR)	38	$233	—	$1898.4B

MASS

Who Holds MASS

Changes This Quarter