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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
776
SPDR Portfolio S&P 500 ETF
SPLG
$85.8B
| $339K | ﹤0.01% |
6,076
+36
| +0.6% | +$2.01K |
|
777
ZipRecruiter
ZIP
$404M
| $339K | ﹤0.01% |
+24,419
| New | +$339K |
|
778
B2Gold
BTG
$5.89B
| $338K | ﹤0.01% |
107,125
+41,735
| +64% | +$132K |
|
779
Globus Medical
GMED
$8.05B
| $338K | ﹤0.01% |
+6,357
| New | +$338K |
|
780
Fresenius Medical Care
FMS
$14.8B
| $336K | ﹤0.01% |
16,139
+353
| +2% | +$7.35K |
|
|
ARCH
781
DELISTED
Arch Resources, Inc.
ARCH
| $332K | ﹤0.01% |
2,004
-2,890
| -59% | -$479K |
|
782
Planet Fitness
PLNT
$8.52B
| $331K | ﹤0.01% |
+4,542
| New | +$331K |
|
783
StoneX
SNEX
$5.02B
| $329K | ﹤0.01% |
+6,698
| New | +$329K |
|
784
Wendy's
WEN
$1.88B
| $329K | ﹤0.01% |
16,917
+13,395
| +380% | +$261K |
|
785
Health Care Select Sector SPDR Fund
XLV
$34.6B
| $329K | ﹤0.01% |
+2,415
| New | +$329K |
|
786
IDT Corp
IDT
$1.62B
| $327K | ﹤0.01% |
9,614
+9,387
| +4,135% | +$319K |
|
|
ALTR
787
DELISTED
Altair Engineering Inc. Class A Common Stock
ALTR
| $325K | ﹤0.01% |
+3,870
| New | +$325K |
|
788
AbCellera Biologics
ABCL
$1.38B
| $324K | ﹤0.01% |
56,860
+52,851
| +1,318% | +$301K |
|
789
NGL Energy Partners
NGL
$748M
| $324K | ﹤0.01% |
58,281
+1,877
| +3% | +$10.4K |
|
790
Rayonier Advanced Materials
RYAM
$402M
| $324K | ﹤0.01% |
80,162
+26,384
| +49% | +$107K |
|
|
MDC
791
DELISTED
M.D.C. Holdings, Inc.
MDC
| $322K | ﹤0.01% |
+5,831
| New | +$322K |
|
792
OSI Systems
OSIS
$3.97B
| $319K | ﹤0.01% |
2,477
+278
| +13% | +$35.8K |
|
793
Sixth Street Specialty
TSLX
$2.32B
| $319K | ﹤0.01% |
+14,790
| New | +$319K |
|
794
FirstCash
FCFS
$6.57B
| $318K | ﹤0.01% |
2,942
+1,534
| +109% | +$166K |
|
795
Rush Street Interactive
RSI
$2.05B
| $318K | ﹤0.01% |
70,825
-128,633
| -64% | -$578K |
|
796
Sempra
SRE
$53.5B
| $318K | ﹤0.01% |
4,257
-21,191
| -83% | -$1.58M |
|
797
Bandwidth Inc
BAND
$458M
| $317K | ﹤0.01% |
+21,915
| New | +$317K |
|
798
United Therapeutics
UTHR
$18.3B
| $317K | ﹤0.01% |
+1,442
| New | +$317K |
|
799
Asure Software
ASUR
$220M
| $316K | ﹤0.01% |
+33,298
| New | +$316K |
|
|
PDCO
800
DELISTED
Patterson Companies, Inc.
PDCO
| $316K | ﹤0.01% |
+11,121
| New | +$316K |
|