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 | |
|---|---|---|---|---|---|---|
676
Alkermes
ALKS
$4.67B
| $244K | ﹤0.01% |
12,002
+3,150
| +36% | +$64K |
|
677
Brixmor Property Group
BRX
$8.52B
| $244K | ﹤0.01% |
11,311
+9,758
| +628% | +$210K |
|
678
Direxion Daily S&P Oil & Gas Exp & Prod Bear 2X Shares
DRIP
$50.9M
| $244K | ﹤0.01% |
526
-354
| -40% | -$164K |
|
679
LendingTree
TREE
$988M
| $243K | ﹤0.01% |
+804
| New | +$243K |
|
680
eHealth
EHTH
$117M
| $242K | ﹤0.01% |
2,526
+324
| +15% | +$31K |
|
681
Global Partners
GLP
$1.76B
| $242K | ﹤0.01% |
12,047
+10,554
| +707% | +$212K |
|
682
DexCom
DXCM
$30.7B
| $240K | ﹤0.01% |
4,400
-15,312
| -78% | -$835K |
|
683
WisdomTree
WT
$2B
| $240K | ﹤0.01% |
49,594
-36,415
| -42% | -$176K |
|
684
Nu Skin
NUS
$562M
| $239K | ﹤0.01% |
5,840
+632
| +12% | +$25.9K |
|
|
ENDP
685
DELISTED
Endo International plc
ENDP
| $239K | ﹤0.01% |
51,027
-26,464
| -34% | -$124K |
|
|
VRS
686
DELISTED
Verso Corporation
VRS
| $239K | ﹤0.01% |
+13,308
| New | +$239K |
|
687
Signet Jewelers
SIG
$3.72B
| $238K | ﹤0.01% |
10,962
+3,405
| +45% | +$73.9K |
|
688
Acuity Brands
AYI
$10.2B
| $237K | ﹤0.01% |
+1,721
| New | +$237K |
|
689
Clarivate
CLVT
$3.02B
| $237K | ﹤0.01% |
+14,144
| New | +$237K |
|
690
Moelis & Co
MC
$5.36B
| $237K | ﹤0.01% |
7,425
+7,046
| +1,859% | +$225K |
|
691
Sociedad Química y Minera de Chile
SQM
$12.1B
| $237K | ﹤0.01% |
8,909
-17,983
| -67% | -$478K |
|
692
ICU Medical
ICUI
$3.21B
| $236K | ﹤0.01% |
1,265
+891
| +238% | +$166K |
|
|
NLSN
693
DELISTED
Nielsen Holdings plc
NLSN
| $236K | ﹤0.01% |
11,671
-97,064
| -89% | -$1.96M |
|
694
CRH
CRH
$74.7B
| $235K | ﹤0.01% |
5,828
-12,262
| -68% | -$494K |
|
695
Booz Allen Hamilton
BAH
$12.5B
| $234K | ﹤0.01% |
+3,290
| New | +$234K |
|
696
Globant
GLOB
$2.68B
| $234K | ﹤0.01% |
+2,215
| New | +$234K |
|
|
CTLT
697
DELISTED
CATALENT, INC.
CTLT
| $234K | ﹤0.01% |
4,160
-3,280
| -44% | -$185K |
|
698
Ambarella
AMBA
$3.56B
| $233K | ﹤0.01% |
3,859
-14,202
| -79% | -$857K |
|
699
iShares MSCI Singapore ETF
EWS
$801M
| $230K | ﹤0.01% |
9,544
+5,318
| +126% | +$128K |
|
|
PE
700
DELISTED
PARSLEY ENERGY INC
PE
| $230K | ﹤0.01% |
12,194
-12
| -0.1% | -$226 |
|