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 |
Apple
AAPL
|
+$45.7M |
| 2 |
Walmart
WMT
|
+$45.2M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$33.2M |
| 5 |
Citigroup
C
|
+$32.7M |
Top Sells
| 1 |
Amazon
AMZN
|
+$164M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$111M |
| 3 |
NVIDIA
NVDA
|
+$77.7M |
| 4 |
Meta Platforms (Facebook)
META
|
+$60.9M |
| 5 |
Procter & Gamble
PG
|
+$38.8M |
Sector Composition
| 1 | Technology | 21.73% |
| 2 | Consumer Discretionary | 10.23% |
| 3 | Healthcare | 8.76% |
| 4 | Industrials | 7.59% |
| 5 | Communication Services | 6.56% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
551
Church & Dwight Co
CHD
$23.1B
| $458K | ﹤0.01% |
+5,190
| New | +$458K |
|
552
Stratasys
SSYS
$861M
| $458K | ﹤0.01% |
27,729
-31,056
| -53% | -$513K |
|
553
United States Brent Oil Fund
BNO
$102M
| $457K | ﹤0.01% |
17,209
-23,662
| -58% | -$628K |
|
554
Origin Materials
ORGN
$78.5M
| $457K | ﹤0.01% |
107,202
+43,492
| +68% | +$185K |
|
|
IMGN
555
DELISTED
Immunogen Inc
IMGN
| $457K | ﹤0.01% |
119,012
+57,332
| +93% | +$220K |
|
556
Vanguard Mid-Cap ETF
VO
$87.4B
| $456K | ﹤0.01% |
2,162
-159
| -7% | -$33.5K |
|
557
Organon & Co
OGN
$2.7B
| $453K | ﹤0.01% |
+19,295
| New | +$453K |
|
558
Remitly
RELY
$4.18B
| $451K | ﹤0.01% |
26,613
+2,761
| +12% | +$46.8K |
|
559
United Parks & Resorts
PRKS
$2.86B
| $449K | ﹤0.01% |
+7,331
| New | +$449K |
|
560
Petrobras Class A
PBR.A
$73.4B
| $447K | ﹤0.01% |
48,270
+16,499
| +52% | +$153K |
|
561
Prosperity Bancshares
PB
$6.36B
| $446K | ﹤0.01% |
+7,250
| New | +$446K |
|
562
Stem
STEM
$116M
| $446K | ﹤0.01% |
+3,934
| New | +$446K |
|
563
Wolfspeed
WOLF
$285M
| $446K | ﹤0.01% |
+6,882
| New | +$446K |
|
|
TEN
564
Tsakos Energy Navigation Ltd.
TEN
$676M
| $446K | ﹤0.01% |
22,973
+13,201
| +135% | +$256K |
|
565
Verint Systems
VRNT
$1.23B
| $440K | ﹤0.01% |
11,816
+5,763
| +95% | +$215K |
|
566
Olaplex Holdings
OLPX
$967M
| $436K | ﹤0.01% |
102,294
+38,075
| +59% | +$162K |
|
567
Patrick Industries
PATK
$3.72B
| $436K | ﹤0.01% |
9,509
+8,178
| +614% | +$375K |
|
|
BRSL
568
Brightstar Lottery PLC
BRSL
$3.18B
| $429K | ﹤0.01% |
16,008
-26,989
| -63% | -$723K |
|
569
Invesco Mortgage Capital
IVR
$521M
| $429K | ﹤0.01% |
38,703
+21,981
| +131% | +$244K |
|
|
CTLT
570
DELISTED
CATALENT, INC.
CTLT
| $427K | ﹤0.01% |
+6,513
| New | +$427K |
|
571
Amphenol
APH
$143B
| $426K | ﹤0.01% |
10,440
+7,234
| +226% | +$295K |
|
|
AIRC
572
DELISTED
Apartment Income REIT Corp.
AIRC
| $425K | ﹤0.01% |
11,873
+4,767
| +67% | +$171K |
|
573
Solid Power
SLDP
$685M
| $422K | ﹤0.01% |
140,228
+19,487
| +16% | +$58.6K |
|
574
Sprott Uranium Miners ETF
URNM
$1.75B
| $422K | ﹤0.01% |
13,453
+6,006
| +81% | +$188K |
|
575
Rollins
ROL
$27.8B
| $420K | ﹤0.01% |
+11,205
| New | +$420K |
|