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
|
+$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$38.8M |
| 4 |
Amazon
AMZN
|
+$38.6M |
| 5 |
Tesla
TSLA
|
+$36M |
Top Sells
| 1 |
Alibaba
BABA
|
+$46.4M |
| 2 |
Boeing
BA
|
+$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.2M |
| 4 |
Biogen
BIIB
|
+$15.8M |
| 5 |
NVIDIA
NVDA
|
+$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
976
Commault Systems
CVLT
$7.75B
| $110K | ﹤0.01% |
+2,484
| New | +$110K |
|
977
Fresh Del Monte Produce
FDP
$1.71B
| $110K | ﹤0.01% |
+3,168
| New | +$110K |
|
978
Renaissance IPO ETF
IPO
$185M
| $110K | ﹤0.01% |
3,551
-1,632
| -31% | -$50.6K |
|
979
Magnachip Semiconductor
MX
$111M
| $110K | ﹤0.01% |
9,492
-76,184
| -89% | -$883K |
|
980
Sabra Healthcare REIT
SBRA
$4.54B
| $110K | ﹤0.01% |
+5,179
| New | +$110K |
|
981
Dolby
DLB
$6.83B
| $109K | ﹤0.01% |
1,595
-14,031
| -90% | -$959K |
|
982
Televisa
TV
$1.48B
| $108K | ﹤0.01% |
9,218
-7,350
| -44% | -$86.1K |
|
983
Caesarstone
CSTE
$50.5M
| $107K | ﹤0.01% |
7,156
-16,204
| -69% | -$242K |
|
984
CoreCivic
CXW
$2.19B
| $107K | ﹤0.01% |
6,190
-5,184
| -46% | -$89.6K |
|
985
Cedar Fair
FUN
$2.19B
| $107K | ﹤0.01% |
1,935
-29
| -1% | -$1.6K |
|
986
Quanta Services
PWR
$58.5B
| $107K | ﹤0.01% |
+2,648
| New | +$107K |
|
|
RARX
987
DELISTED
Ra Pharmaceuticals, Inc. Common Stock
RARX
| $107K | ﹤0.01% |
+2,294
| New | +$107K |
|
988
Hilton Grand Vacations
HGV
$4B
| $106K | ﹤0.01% |
3,086
-55,594
| -95% | -$1.91M |
|
989
Teekay
TK
$725M
| $106K | ﹤0.01% |
+20,031
| New | +$106K |
|
|
EVOP
990
DELISTED
EVO Payments, Inc. Class A Common Stock
EVOP
| $106K | ﹤0.01% |
4,039
-1,277
| -24% | -$33.5K |
|
|
FPRX
991
DELISTED
Five Prime Therapeutics, Inc.
FPRX
| $106K | ﹤0.01% |
23,259
+18,928
| +437% | +$86.3K |
|
992
Adtran
ADTN
$824M
| $105K | ﹤0.01% |
+10,676
| New | +$105K |
|
993
Sleep Number
SNBR
$214M
| $105K | ﹤0.01% |
+2,146
| New | +$105K |
|
994
SPDR Portfolio S&P 500 Growth ETF
SPYG
$41.5B
| $105K | ﹤0.01% |
2,511
+1,361
| +118% | +$56.9K |
|
995
Veracyte
VCYT
$2.47B
| $105K | ﹤0.01% |
3,765
-10,499
| -74% | -$293K |
|
996
BlackBerry
BB
$2.26B
| $104K | ﹤0.01% |
16,223
-148,524
| -90% | -$952K |
|
997
Howard Hughes
HHH
$4.73B
| $104K | ﹤0.01% |
861
-596
| -41% | -$72K |
|
998
ManpowerGroup
MAN
$1.76B
| $104K | ﹤0.01% |
1,074
-710
| -40% | -$68.8K |
|
999
OR Royalties Inc.
OR
$6.66B
| $104K | ﹤0.01% |
10,763
+6,324
| +142% | +$61.1K |
|
1000
SandRidge Energy
SD
$424M
| $104K | ﹤0.01% |
24,759
+14,379
| +139% | +$60.4K |
|