Question 1

Which hedge funds and institutional investors hold OSIS?

Accepted Answer

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

Accepted Answer

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

Question 3

How current is the whale data for OSIS?

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 OSIS?

Accepted Answer

QoQ changes for OSIS 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
Mawer	662.6K	$175.9M	1.1%	$15.4B
State Street	662.1K	$175.8M	0.0%	$2896.4B
PRIMECAP	244.7K	$65.0M	0.1%	$127.0B
Invesco	219.4K	$58.3M	0.0%	$653.3B
William Blair	171.7K	$45.6M	0.2%	$30.3B
ClearBridge	163.6K	$43.4M	0.0%	$114.9B
Fidelity (FMR)	57.1K	$15.2M	0.0%	$1898.4B
Geode Capital	54.9K	$14.6M	0.0%	$1607.5B
American Century	51.0K	$13.5M	0.0%	$194.3B
Segall Bryant	47.9K	$12.7M	0.2%	$7.0B
Millennium	43.6K	$11.6M	0.0%	$240.3B
PDT Partners	42.1K	$11.2M	0.7%	$1.7B
Robeco	36.5K	$9.7M	0.2%	$4.7B
First Eagle	24.6K	$6.5M	0.0%	$59.0B
Citadel	14.3K	$3.8M	0.0%	$618.5B
DFA	11.9K	$3.2M	0.0%	$481.4B
Neuberger Berman (Eisman)	10.5K	$2.8M	0.0%	$131.4B
Cascade (Gates)	9.3K	$2.5M	1.5%	$168.9M
DE Shaw	7.3K	$1.9M	0.0%	$166.3B
Citadel	5.3K	$1.4M	0.0%	$618.5B
Citadel	4.9K	$1.3M	0.0%	$618.5B
Two Sigma	4.9K	$1.3M	0.0%	$123.9B
Marshall Wace	4.5K	$1.2M	0.0%	$100.4B
Bridgewater	3.2K	$853K	0.0%	$22.4B
Wellington	2.9K	$763K	0.0%	$535.5B
Two Sigma	2.7K	$717K	0.0%	$123.9B
Gotham Asset	2.6K	$702K	0.0%	$32.7B
Winton	1.2K	$306K	0.0%	$2.9B
Franklin Templeton	1.1K	$280K	0.0%	$408.3B
Balyasny	114	$30K	—	$77.1B
BlackRock	43	$11K	—	$5723.5B
Northern Trust	22	$6K	—	$756.6B
AQR Capital	21	$6K	—	$218.4B

OSIS

Who Holds OSIS

Changes This Quarter