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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
BioNTech
BNTX
$23.1B
| $522K | ﹤0.01% |
+5,665
| New | +$522K |
|
652
Rollins
ROL
$26.9B
| $521K | ﹤0.01% |
11,267
+3,149
| +39% | +$146K |
|
653
ProShares Ultra Semiconductors
USD
$1.49B
| $521K | ﹤0.01% |
10,526
-12,764
| -55% | -$632K |
|
654
Invesco DB Agriculture Fund
DBA
$798M
| $518K | ﹤0.01% |
+20,945
| New | +$518K |
|
655
Appian
APPN
$2.42B
| $517K | ﹤0.01% |
12,961
+4,636
| +56% | +$185K |
|
656
MindMed
MNMD
$688M
| $515K | ﹤0.01% |
54,848
+45,871
| +511% | +$431K |
|
657
Getty Images
GETY
$859M
| $513K | ﹤0.01% |
123,839
+79,469
| +179% | +$329K |
|
658
Olin
OLN
$2.77B
| $511K | ﹤0.01% |
8,697
-65,322
| -88% | -$3.84M |
|
659
Lemonade
LMND
$4.5B
| $508K | ﹤0.01% |
30,970
-39,362
| -56% | -$646K |
|
660
Kura Oncology
KURA
$716M
| $506K | ﹤0.01% |
23,746
+16,201
| +215% | +$345K |
|
661
Scholar Rock
SRRK
$2.96B
| $506K | ﹤0.01% |
28,513
+26,381
| +1,237% | +$468K |
|
662
Saia
SAIA
$8.26B
| $504K | ﹤0.01% |
863
-2,016
| -70% | -$1.18M |
|
663
Klaviyo
KVYO
$10.6B
| $500K | ﹤0.01% |
19,646
+1,687
| +9% | +$42.9K |
|
|
EQC
664
DELISTED
Equity Commonwealth
EQC
| $499K | ﹤0.01% |
+26,468
| New | +$499K |
|
665
SPDR Bloomberg High Yield Bond ETF
JNK
$8.09B
| $497K | ﹤0.01% |
+5,229
| New | +$497K |
|
666
Liberty Media Series C
FWONK
$25.9B
| $494K | ﹤0.01% |
+7,541
| New | +$494K |
|
667
SPDR S&P Insurance ETF
KIE
$755M
| $494K | ﹤0.01% |
9,497
+3,191
| +51% | +$166K |
|
668
Iovance Biotherapeutics
IOVA
$742M
| $491K | ﹤0.01% |
33,195
-340,872
| -91% | -$5.04M |
|
669
Moody's
MCO
$86.2B
| $490K | ﹤0.01% |
1,247
-365
| -23% | -$143K |
|
670
Aehr Test Systems
AEHR
$898M
| $488K | ﹤0.01% |
39,434
+1,695
| +4% | +$21K |
|
671
DXP Enterprises
DXPE
$1.82B
| $486K | ﹤0.01% |
+9,052
| New | +$486K |
|
672
Invesco S&P 500 Low Volatility ETF
SPLV
$7.78B
| $484K | ﹤0.01% |
7,352
-33,173
| -82% | -$2.18M |
|
673
Eagle Materials
EXP
$7.5B
| $483K | ﹤0.01% |
1,779
-4,524
| -72% | -$1.23M |
|
674
Vimeo
VMEO
$1.28B
| $481K | ﹤0.01% |
117,715
+108,126
| +1,128% | +$442K |
|
675
VeriSign
VRSN
$26.4B
| $481K | ﹤0.01% |
2,540
+2,209
| +667% | +$418K |
|