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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Shake Shack
SHAK
$4.18B
| $83K | ﹤0.01% |
2,406
-1,743
| -42% | -$60.1K |
|
927
Energous
WATT
$11.1M
| $83K | ﹤0.01% |
9
+4
| +80% | +$36.9K |
|
|
EBSB
928
DELISTED
Meridian Bancorp, Inc.
EBSB
| $83K | ﹤0.01% |
+4,936
| New | +$83K |
|
|
XRM
929
DELISTED
Xerium Technologies Inc (new)
XRM
| $83K | ﹤0.01% |
11,613
+9,025
| +349% | +$64.5K |
|
|
RATE
930
DELISTED
Bankrate Inc
RATE
| $83K | ﹤0.01% |
6,533
+5,849
| +855% | +$74.3K |
|
931
Camtek
CAMT
$3.84B
| $82K | ﹤0.01% |
17,013
+15,906
| +1,437% | +$76.7K |
|
932
Vanguard Small-Cap Growth ETF
VBK
$20.7B
| $82K | ﹤0.01% |
564
+498
| +755% | +$72.4K |
|
|
PDCE
933
DELISTED
PDC Energy, Inc.
PDCE
| $82K | ﹤0.01% |
+1,922
| New | +$82K |
|
|
ITG
934
DELISTED
Investment Technology Group Inc
ITG
| $82K | ﹤0.01% |
+3,901
| New | +$82K |
|
935
Verisk Analytics
VRSK
$37.2B
| $81K | ﹤0.01% |
968
-967
| -50% | -$80.9K |
|
|
CVRR
936
DELISTED
CVR Refining, LP
CVRR
| $81K | ﹤0.01% |
8,556
-22,936
| -73% | -$217K |
|
|
AM
937
DELISTED
ANTERO MIDSTREAM PARTNERS LP
AM
| $81K | ﹤0.01% |
+2,455
| New | +$81K |
|
938
Allegion
ALLE
$15.2B
| $80K | ﹤0.01% |
988
+597
| +153% | +$48.3K |
|
939
CrossAmerica Partners
CAPL
$783M
| $80K | ﹤0.01% |
+3,160
| New | +$80K |
|
940
Novanta
NOVT
$4.24B
| $80K | ﹤0.01% |
2,248
+1,700
| +310% | +$60.5K |
|
941
Watts Water Technologies
WTS
$9.47B
| $80K | ﹤0.01% |
1,280
+1,080
| +540% | +$67.5K |
|
|
CTB
942
DELISTED
Cooper Tire & Rubber Co.
CTB
| $80K | ﹤0.01% |
+2,242
| New | +$80K |
|
|
VIA
943
DELISTED
Viacom Inc. Class A
VIA
| $80K | ﹤0.01% |
2,105
+822
| +64% | +$31.2K |
|
944
Digimarc
DMRC
$198M
| $79K | ﹤0.01% |
+1,979
| New | +$79K |
|
945
iShares Latin America 40 ETF
ILF
$1.81B
| $79K | ﹤0.01% |
2,620
+2,048
| +358% | +$61.8K |
|
946
Lattice Semiconductor
LSCC
$9.04B
| $79K | ﹤0.01% |
11,903
+8,532
| +253% | +$56.6K |
|
947
PENN Entertainment
PENN
$2.92B
| $79K | ﹤0.01% |
+3,700
| New | +$79K |
|
948
American Electric Power
AEP
$58.2B
| $78K | ﹤0.01% |
+1,130
| New | +$78K |
|
949
PRA Group
PRAA
$677M
| $78K | ﹤0.01% |
2,068
-1,224
| -37% | -$46.2K |
|
950
Radiant Logistics
RLGT
$309M
| $78K | ﹤0.01% |
14,514
+13,314
| +1,110% | +$71.6K |
|