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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
626
Protolabs
PRLB
$1.19B
| $152K | 0.01% |
+2,543
| New | +$152K |
|
|
CYOU
627
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $152K | 0.01% |
+5,584
| New | +$152K |
|
628
Genesco
GCO
$360M
| $151K | 0.01% |
2,780
+2,691
| +3,024% | +$146K |
|
629
MakeMyTrip
MMYT
$9.56B
| $151K | 0.01% |
+6,431
| New | +$151K |
|
630
Kennedy-Wilson Holdings
KW
$1.21B
| $149K | 0.01% |
6,632
+6,329
| +2,089% | +$142K |
|
631
YPF
YPF
$12.1B
| $149K | 0.01% |
8,186
-16,570
| -67% | -$302K |
|
632
Liberty Latin America Class A
LILA
$1.6B
| $148K | 0.01% |
5,692
+5,187
| +1,027% | +$135K |
|
|
MTOR
633
DELISTED
MERITOR, Inc.
MTOR
| $148K | 0.01% |
13,305
+10,895
| +452% | +$121K |
|
|
INFN
634
DELISTED
Infinera Corporation Common Stock
INFN
| $147K | 0.01% |
16,307
-23,818
| -59% | -$215K |
|
|
SRCL
635
DELISTED
Stericycle Inc
SRCL
| $146K | 0.01% |
1,829
-5,704
| -76% | -$455K |
|
|
CLD
636
DELISTED
Cloud Peak Energy Inc
CLD
| $146K | 0.01% |
+26,970
| New | +$146K |
|
637
Golar LNG
GLNG
$4.52B
| $144K | 0.01% |
6,827
-23,162
| -77% | -$489K |
|
638
Lesaka Technologies
LSAK
$375M
| $144K | 0.01% |
16,867
+14,471
| +604% | +$124K |
|
|
SXCP
639
DELISTED
SunCoke Energy Partners, L.P.
SXCP
| $144K | 0.01% |
+9,536
| New | +$144K |
|
|
EFII
640
DELISTED
Electronics for Imaging
EFII
| $144K | 0.01% |
2,956
+1,081
| +58% | +$52.7K |
|
641
Weibo
WB
$2.87B
| $143K | 0.01% |
2,867
-27,753
| -91% | -$1.38M |
|
|
PSXP
642
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $143K | 0.01% |
+2,943
| New | +$143K |
|
643
Navient
NAVI
$1.37B
| $142K | 0.01% |
+9,828
| New | +$142K |
|
|
PRMW
644
DELISTED
Primo Water Corporation
PRMW
| $141K | 0.01% |
9,929
-5,422
| -35% | -$77K |
|
|
ETP
645
DELISTED
Energy Transfer Partners, L.P.
ETP
| $141K | 0.01% |
+4,997
| New | +$141K |
|
|
CXRX
646
DELISTED
Concordia International Corp. Common Stock
CXRX
| $141K | 0.01% |
31,524
+25,649
| +437% | +$115K |
|
647
iShares Gold Trust
IAU
$52.6B
| $140K | 0.01% |
5,548
+560
| +11% | +$14.1K |
|
648
MKS Inc. Common Stock
MKSI
$7.02B
| $140K | 0.01% |
2,830
+2,329
| +465% | +$115K |
|
|
DATA
649
DELISTED
Tableau Software, Inc.
DATA
| $140K | 0.01% |
+2,544
| New | +$140K |
|
|
EVHC
650
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $140K | 0.01% |
2,111
-1,111
| -34% | -$73.7K |
|