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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
Travelers Companies
TRV
$61.3B
| $140K | 0.01% |
+1,180
| New | +$140K |
|
602
VirnetX
VHC
$74.6M
| $140K | 0.01% |
1,751
+828
| +90% | +$66.2K |
|
603
WESCO International
WCC
$10.5B
| $140K | 0.01% |
2,720
+1,347
| +98% | +$69.3K |
|
604
Xerox
XRX
$456M
| $139K | 0.01% |
5,574
-11,835
| -68% | -$295K |
|
|
STRZA
605
DELISTED
Starz - Series A
STRZA
| $139K | 0.01% |
4,666
+864
| +23% | +$25.7K |
|
606
ProShares UltraShort MSCI Brazil Capped
BZQ
$5.47M
| $138K | 0.01% |
261
+115
| +79% | +$60.8K |
|
607
DigitalBridge
DBRG
$2.03B
| $138K | 0.01% |
3,382
+1,512
| +81% | +$61.7K |
|
|
NUVA
608
DELISTED
NuVasive, Inc.
NUVA
| $138K | 0.01% |
2,326
-894
| -28% | -$53K |
|
|
ASCMA
609
DELISTED
Ascent Capital Group, Inc. Series A
ASCMA
| $138K | 0.01% |
9,007
-4,624
| -34% | -$70.8K |
|
|
RPRX
610
DELISTED
Repros Therapeutics Inc.
RPRX
| $138K | 0.01% |
+86,054
| New | +$138K |
|
611
Vicor
VICR
$2.25B
| $137K | 0.01% |
13,664
+805
| +6% | +$8.07K |
|
|
SQBG
612
DELISTED
Sequential Brands Group, Inc.
SQBG
| $137K | 0.01% |
432
+368
| +575% | +$117K |
|
613
Cemex
CX
$13.3B
| $136K | 0.01% |
+23,063
| New | +$136K |
|
|
KERX
614
DELISTED
Keryx Biopharmaceuticals Inc
KERX
| $136K | 0.01% |
20,554
+12,156
| +145% | +$80.4K |
|
|
SGG
615
DELISTED
iPath Bloomberg Sugar Subindex Total Return ETN due June 24, 2038
SGG
| $136K | 0.01% |
2,916
+765
| +36% | +$35.7K |
|
616
Vuzix
VUZI
$176M
| $135K | 0.01% |
17,932
+3,531
| +25% | +$26.6K |
|
|
WAIR
617
DELISTED
WESCO Aircraft Holdings Inc.
WAIR
| $134K | 0.01% |
9,993
+419
| +4% | +$5.62K |
|
618
Nexstar Media Group
NXST
$5.98B
| $133K | 0.01% |
2,808
-6,580
| -70% | -$312K |
|
619
Philips
PHG
$26.9B
| $133K | 0.01% |
6,980
-16,512
| -70% | -$315K |
|
620
USA Compression Partners
USAC
$2.84B
| $133K | 0.01% |
9,138
-218
| -2% | -$3.17K |
|
|
ACHN
621
DELISTED
Achillion Pharmaceuticals, Inc.
ACHN
| $132K | 0.01% |
17,009
+11,116
| +189% | +$86.3K |
|
|
OAK
622
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $132K | 0.01% |
+2,967
| New | +$132K |
|
623
Kimco Realty
KIM
$15.1B
| $131K | 0.01% |
4,189
+3,834
| +1,080% | +$120K |
|
624
Rigel Pharmaceuticals
RIGL
$654M
| $131K | 0.01% |
5,910
+4,486
| +315% | +$99.4K |
|
|
DBD
625
DELISTED
Diebold Nixdorf Incorporated
DBD
| $129K | 0.01% |
5,233
-2,766
| -35% | -$68.2K |
|