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 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$32.1M |
| 2 |
PARA
Paramount Global Class B
PARA
|
+$23.3M |
| 3 |
Pinduoduo
PDD
|
+$17.3M |
| 4 |
Pfizer
PFE
|
+$16.8M |
| 5 |
American Airlines Group
AAL
|
+$14.5M |
Top Sells
| 1 |
Amazon
AMZN
|
+$64.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$38.1M |
| 3 |
AutoZone
AZO
|
+$32.2M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$25.3M |
| 5 |
Apple
AAPL
|
+$22.5M |
Sector Composition
| 1 | Technology | 20.25% |
| 2 | Consumer Discretionary | 15.22% |
| 3 | Healthcare | 10.03% |
| 4 | Financials | 9.2% |
| 5 | Industrials | 9.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
851
ProShares UltraShort FTSE Europe
EPV
$16.1M
| $343K | ﹤0.01% |
4,743
| – | – |
|
852
Ryder
R
$7.61B
| $343K | ﹤0.01% |
+4,541
| New | +$343K |
|
853
Lantheus
LNTH
$3.57B
| $342K | ﹤0.01% |
+16,016
| New | +$342K |
|
854
Cassava Sciences
SAVA
$101M
| $342K | ﹤0.01% |
7,613
-25,785
| -77% | -$1.16M |
|
|
RNWK
855
DELISTED
RealNetworks Inc
RNWK
| $342K | ﹤0.01% |
+80,669
| New | +$342K |
|
856
Coca-Cola Europacific Partners
CCEP
$40.4B
| $341K | ﹤0.01% |
6,539
-5,145
| -44% | -$268K |
|
857
STAAR Surgical
STAA
$1.37B
| $341K | ﹤0.01% |
3,244
-3,548
| -52% | -$373K |
|
858
Permian Resources
PR
$9.99B
| $340K | ﹤0.01% |
81,167
+44,765
| +123% | +$188K |
|
859
Uranium Energy
UEC
$5.6B
| $340K | ﹤0.01% |
118,908
+66,679
| +128% | +$191K |
|
860
Dave & Buster's
PLAY
$769M
| $338K | ﹤0.01% |
+7,061
| New | +$338K |
|
|
AFMD
861
DELISTED
Affimed
AFMD
| $336K | ﹤0.01% |
+4,251
| New | +$336K |
|
862
Charles River Laboratories
CRL
$7.54B
| $336K | ﹤0.01% |
+1,160
| New | +$336K |
|
|
GOGL
863
DELISTED
Golden Ocean Group
GOGL
| $336K | ﹤0.01% |
50,245
+45,318
| +920% | +$303K |
|
|
ML
864
DELISTED
MoneyLion Inc.
ML
| $336K | ﹤0.01% |
+1,127
| New | +$336K |
|
865
Alta Equipment Group
ALTG
$246M
| $335K | ﹤0.01% |
+25,784
| New | +$335K |
|
866
A.O. Smith
AOS
$10.2B
| $335K | ﹤0.01% |
4,964
+4,000
| +415% | +$270K |
|
867
SPDR Portfolio S&P 500 High Dividend ETF
SPYD
$7.4B
| $335K | ﹤0.01% |
8,723
+7,642
| +707% | +$293K |
|
868
ProShares UltraPro Short Dow 30
SDOW
$175M
| $333K | ﹤0.01% |
2,149
-2,915
| -58% | -$452K |
|
|
CMD
869
DELISTED
Cantel Medical Corporation
CMD
| $333K | ﹤0.01% |
4,181
+3,445
| +468% | +$274K |
|
870
AnaptysBio
ANAB
$637M
| $332K | ﹤0.01% |
15,445
+8,723
| +130% | +$188K |
|
871
Alarm.com
ALRM
$2.76B
| $331K | ﹤0.01% |
3,832
-663
| -15% | -$57.3K |
|
872
Conduent
CNDT
$442M
| $329K | ﹤0.01% |
49,443
-99,290
| -67% | -$661K |
|
|
FRSX
873
Foresight Autonomous Holdings
FRSX
$8.24M
| $327K | ﹤0.01% |
+1,249
| New | +$327K |
|
874
Hyatt Hotels
H
$13.6B
| $327K | ﹤0.01% |
3,958
-33,108
| -89% | -$2.74M |
|
875
uniQure
QURE
$959M
| $326K | ﹤0.01% |
9,684
+1,431
| +17% | +$48.2K |
|