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 |
NVIDIA
NVDA
|
+$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
+$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$18M |
| 4 |
Netflix
NFLX
|
+$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
+$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
+$41.3M |
| 3 |
Walt Disney
DIS
|
+$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
Insteel Industries
IIIN
$752M
| $105K | ﹤0.01% |
5,055
-211
| -4% | -$4.38K |
|
852
Pan American Silver
PAAS
$15.5B
| $105K | ﹤0.01% |
8,139
-31,510
| -79% | -$407K |
|
853
Timken Company
TKR
$5.44B
| $105K | ﹤0.01% |
2,061
-2,579
| -56% | -$131K |
|
|
HZNP
854
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $105K | ﹤0.01% |
4,370
-2,171
| -33% | -$52.2K |
|
|
BRKL
855
DELISTED
Brookline Bancorp
BRKL
| $104K | ﹤0.01% |
6,790
+6,758
| +21,119% | +$104K |
|
856
EPR Properties
EPR
$4.44B
| $104K | ﹤0.01% |
+1,398
| New | +$104K |
|
857
FirstCash
FCFS
$6.53B
| $104K | ﹤0.01% |
+1,040
| New | +$104K |
|
858
Gyre Therapeutics
GYRE
$725M
| $104K | ﹤0.01% |
1,892
-1,026
| -35% | -$56.4K |
|
859
Premier
PINC
$2.2B
| $104K | ﹤0.01% |
2,669
-867
| -25% | -$33.8K |
|
860
American States Water
AWR
$2.83B
| $103K | ﹤0.01% |
1,375
+1,255
| +1,046% | +$94K |
|
|
GPMT
861
Granite Point Mortgage Trust
GPMT
$143M
| $103K | ﹤0.01% |
5,377
-1,802
| -25% | -$34.5K |
|
|
WBT
862
DELISTED
Welbilt, Inc.
WBT
| $103K | ﹤0.01% |
6,214
-21,890
| -78% | -$363K |
|
|
CJ
863
DELISTED
C&J Energy Services, Inc.
CJ
| $103K | ﹤0.01% |
8,749
-6,267
| -42% | -$73.8K |
|
864
Home BancShares
HOMB
$5.89B
| $102K | ﹤0.01% |
5,346
+547
| +11% | +$10.4K |
|
865
SiriusPoint
SPNT
$2.23B
| $102K | ﹤0.01% |
9,886
-6,974
| -41% | -$72K |
|
866
Under Armour Class C
UA
$2.05B
| $102K | ﹤0.01% |
4,627
-38,779
| -89% | -$855K |
|
|
BEST
867
DELISTED
BEST Inc. American Depositary Shares, each representing twenty (20) Class A Ordinary Shares
BEST
| $102K | ﹤0.01% |
934
-1,545
| -62% | -$169K |
|
|
NBEV
868
DELISTED
NewAge, Inc. Common Stock (Delaware)
NBEV
| $102K | ﹤0.01% |
+21,968
| New | +$102K |
|
869
Carlyle Secured Lending
CGBD
$998M
| $101K | ﹤0.01% |
+6,667
| New | +$101K |
|
870
Mettler-Toledo International
MTD
$26.1B
| $100K | ﹤0.01% |
+120
| New | +$100K |
|
871
Alkermes
ALKS
$4.51B
| $99K | ﹤0.01% |
4,436
+406
| +10% | +$9.06K |
|
872
Avnet
AVT
$4.49B
| $99K | ﹤0.01% |
2,187
+93
| +4% | +$4.21K |
|
873
Bloomin' Brands
BLMN
$578M
| $99K | ﹤0.01% |
5,280
+973
| +23% | +$18.2K |
|
874
Kraft Heinz
KHC
$31B
| $99K | ﹤0.01% |
+3,200
| New | +$99K |
|
875
Olin
OLN
$3.03B
| $99K | ﹤0.01% |
4,531
-11,575
| -72% | -$253K |
|