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 | |
|---|---|---|---|---|---|---|
951
Construction Partners
ROAD
$6.95B
| $266K | ﹤0.01% |
8,925
+7,456
| +508% | +$222K |
|
952
Expedia Group
EXPE
$26.7B
| $265K | ﹤0.01% |
1,545
-27,285
| -95% | -$4.68M |
|
953
Middleby
MIDD
$6.99B
| $265K | ﹤0.01% |
1,602
-361
| -18% | -$59.7K |
|
954
Range Resources
RRC
$8.3B
| $265K | ﹤0.01% |
25,680
-53,312
| -67% | -$550K |
|
955
LiveOne
LVO
$58.6M
| $264K | ﹤0.01% |
61,050
+55,614
| +1,023% | +$240K |
|
956
Qiagen
QGEN
$9.98B
| $263K | ﹤0.01% |
5,102
+3,315
| +186% | +$171K |
|
|
ATNX
957
DELISTED
Athenex, Inc. Common Stock
ATNX
| $263K | ﹤0.01% |
3,062
+2,451
| +401% | +$211K |
|
958
ProShares UltraPro Short Russell2000
SRTY
$82M
| $262K | ﹤0.01% |
4,893
+2,353
| +93% | +$126K |
|
|
BBBY
959
Bed Bath & Beyond, Inc.
BBBY
$592M
| $260K | ﹤0.01% |
3,928
-14,050
| -78% | -$930K |
|
960
iShares Core S&P 500 ETF
IVV
$670B
| $260K | ﹤0.01% |
+654
| New | +$260K |
|
961
O-I Glass
OI
$1.95B
| $260K | ﹤0.01% |
17,673
+11,674
| +195% | +$172K |
|
|
TBHC
962
The Brand House Collective, Inc. Common Stock
TBHC
$44.2M
| $259K | ﹤0.01% |
9,241
-54,812
| -86% | -$1.54M |
|
|
SOGO
963
DELISTED
Sogou Inc. American Depositary Shares, each representing one Class A Ordinary Share
SOGO
| $258K | ﹤0.01% |
34,182
-61,999
| -64% | -$468K |
|
964
Quantum-Si Incorporated
QSI
$227M
| $257K | ﹤0.01% |
+21,605
| New | +$257K |
|
965
Direxion Daily Retail Bull 3X Shares
RETL
$38.7M
| $257K | ﹤0.01% |
+6,605
| New | +$257K |
|
|
LTHM
966
DELISTED
Livent Corporation
LTHM
| $257K | ﹤0.01% |
14,849
+12,347
| +493% | +$214K |
|
967
Ascendis Pharma
ASND
$12B
| $256K | ﹤0.01% |
1,994
-2,264
| -53% | -$291K |
|
968
Extreme Networks
EXTR
$2.96B
| $256K | ﹤0.01% |
29,326
+25,006
| +579% | +$218K |
|
969
MPLX
MPLX
$50.8B
| $256K | ﹤0.01% |
10,024
+8,566
| +588% | +$219K |
|
970
National Fuel Gas
NFG
$7.87B
| $256K | ﹤0.01% |
+5,124
| New | +$256K |
|
971
FreightCar America
RAIL
$159M
| $255K | ﹤0.01% |
38,745
+31,585
| +441% | +$208K |
|
972
Dayforce
DAY
$10.9B
| $255K | ﹤0.01% |
3,027
-8,898
| -75% | -$750K |
|
|
MTOR
973
DELISTED
MERITOR, Inc.
MTOR
| $254K | ﹤0.01% |
8,636
-3,649
| -30% | -$107K |
|
974
Super Micro Computer
SMCI
$26.1B
| $253K | ﹤0.01% |
+64,990
| New | +$253K |
|
975
Revolve Group
RVLV
$1.67B
| $252K | ﹤0.01% |
+5,623
| New | +$252K |
|