Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
JG
776
Aurora Mobile
JG
$60.1M
| $404K | ﹤0.01% |
+4,781
| New | +$404K |
|
777
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$521M
| $402K | ﹤0.01% |
14,189
+12,149
| +596% | +$344K |
|
778
StoneCo
STNE
$4.71B
| $401K | ﹤0.01% |
+6,560
| New | +$401K |
|
779
Sysco
SYY
$38.3B
| $399K | ﹤0.01% |
5,077
-17,775
| -78% | -$1.4M |
|
780
Xylem
XYL
$33.5B
| $399K | ﹤0.01% |
+3,798
| New | +$399K |
|
781
B2Gold
BTG
$5.74B
| $398K | ﹤0.01% |
92,447
+8,894
| +11% | +$38.3K |
|
782
eXp World Holdings
EXPI
$1.76B
| $398K | ﹤0.01% |
+8,750
| New | +$398K |
|
783
Pegasystems
PEGA
$9.66B
| $397K | ﹤0.01% |
6,954
+4,006
| +136% | +$229K |
|
784
Altice USA
ATUS
$1.09B
| $395K | ﹤0.01% |
12,150
-9,432
| -44% | -$307K |
|
785
Bloomin' Brands
BLMN
$586M
| $395K | ﹤0.01% |
14,606
+14,546
| +24,243% | +$393K |
|
786
CRH
CRH
$74.7B
| $395K | ﹤0.01% |
8,417
+5,695
| +209% | +$267K |
|
787
Immersion
IMMR
$222M
| $394K | ﹤0.01% |
41,231
+3,633
| +10% | +$34.7K |
|
788
Arcturus Therapeutics
ARCT
$489M
| $393K | ﹤0.01% |
9,535
+8,645
| +971% | +$356K |
|
789
Woodward
WWD
$14.3B
| $392K | ﹤0.01% |
+3,251
| New | +$392K |
|
790
Snowflake
SNOW
$76.5B
| $390K | ﹤0.01% |
+1,703
| New | +$390K |
|
791
Mercury Systems
MRCY
$4.3B
| $389K | ﹤0.01% |
5,519
+2,139
| +63% | +$151K |
|
|
MGLN
792
DELISTED
Magellan Health Services, Inc.
MGLN
| $389K | ﹤0.01% |
+4,181
| New | +$389K |
|
793
AAR Corp
AIR
$2.66B
| $388K | ﹤0.01% |
9,323
+2,799
| +43% | +$116K |
|
794
Denny's
DENN
$253M
| $388K | ﹤0.01% |
21,469
+5,509
| +35% | +$99.6K |
|
795
Green Dot
GDOT
$757M
| $388K | ﹤0.01% |
8,486
+2,034
| +32% | +$93K |
|
796
Eastman Chemical
EMN
$7.47B
| $387K | ﹤0.01% |
+3,519
| New | +$387K |
|
797
iShares Self-Driving EV and Tech ETF
IDRV
$159M
| $387K | ﹤0.01% |
8,412
+6,755
| +408% | +$311K |
|
|
CVET
798
DELISTED
Covetrus, Inc. Common Stock
CVET
| $386K | ﹤0.01% |
12,883
+10,310
| +401% | +$309K |
|
799
Arbor Realty Trust
ABR
$2.26B
| $384K | ﹤0.01% |
+24,169
| New | +$384K |
|
800
Cohu
COHU
$976M
| $383K | ﹤0.01% |
9,155
-4,137
| -31% | -$173K |
|