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
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
DIDI
551
DELISTED
DiDi Global Inc. American depositary shares, each four representing one Class A ordinary share
DIDI
| $510K | ﹤0.01% |
172,900
-35,296
| -17% | -$104K |
|
552
Cboe Global Markets
CBOE
$24.4B
| $509K | ﹤0.01% |
+4,505
| New | +$509K |
|
553
Navios Maritime Partners
NMM
$1.43B
| $507K | ﹤0.01% |
22,074
+13,716
| +164% | +$315K |
|
554
Elastic
ESTC
$9.51B
| $505K | ﹤0.01% |
7,473
-21,809
| -74% | -$1.47M |
|
555
Huazhu Hotels Group
HTHT
$11.3B
| $505K | ﹤0.01% |
13,255
-45,930
| -78% | -$1.75M |
|
556
Wayfair
W
$11.2B
| $505K | ﹤0.01% |
11,611
-6,389
| -35% | -$278K |
|
|
AIV
557
Aimco
AIV
$1.09B
| $503K | ﹤0.01% |
78,695
+70,399
| +849% | +$450K |
|
558
ADT
ADT
$7.01B
| $502K | ﹤0.01% |
81,741
+3,677
| +5% | +$22.6K |
|
559
Dollar Tree
DLTR
$20B
| $501K | ﹤0.01% |
+3,217
| New | +$501K |
|
560
Nice
NICE
$8.82B
| $501K | ﹤0.01% |
2,608
-1,142
| -30% | -$219K |
|
|
SRNE
561
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $497K | ﹤0.01% |
247,557
+168,853
| +215% | +$339K |
|
|
XXII
562
22nd Century Group
XXII
$6.2M
| – | – |
0
| – | -$14K |
|
|
SLI
563
Standard Lithium
SLI
$586M
| $494K | ﹤0.01% |
116,672
+60,324
| +107% | +$255K |
|
564
Gold Fields
GFI
$33.6B
| $492K | ﹤0.01% |
+54,032
| New | +$492K |
|
565
Independence Realty Trust
IRT
$4.14B
| $492K | ﹤0.01% |
23,735
+19,214
| +425% | +$398K |
|
566
monday.com
MNDY
$9.73B
| $486K | ﹤0.01% |
4,713
+3,254
| +223% | +$336K |
|
|
MOMO
567
Hello Group
MOMO
$1.22B
| $482K | ﹤0.01% |
95,473
+32,443
| +51% | +$164K |
|
|
NXDR
568
Nextdoor Holdings
NXDR
$782M
| $481K | ﹤0.01% |
145,332
+52,624
| +57% | +$174K |
|
569
Trex
TREX
$6.44B
| $481K | ﹤0.01% |
8,855
+2,770
| +46% | +$150K |
|
570
Vroom, Inc. Common Stock
VRM
$135M
| $481K | ﹤0.01% |
4,813
-1,814
| -27% | -$181K |
|
571
Ramaco Resources Class A
METC
$1.73B
| $476K | ﹤0.01% |
37,440
+33,695
| +900% | +$428K |
|
|
SUP
572
DELISTED
Superior Industries International
SUP
| $475K | ﹤0.01% |
120,278
+53,935
| +81% | +$213K |
|
573
Otter Tail
OTTR
$3.46B
| $471K | ﹤0.01% |
7,024
+6,543
| +1,360% | +$439K |
|
574
B2Gold
BTG
$5.68B
| $468K | ﹤0.01% |
138,192
+8,991
| +7% | +$30.4K |
|
|
JOYY
575
JOYY Inc. American Depositary Shares
JOYY
$3.2B
| $468K | ﹤0.01% |
15,699
-3,266
| -17% | -$97.4K |
|