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
|
+$35.2M |
| 2 |
Micron Technology
MU
|
+$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$29.5M |
| 4 |
NVIDIA
NVDA
|
+$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$33.4M |
| 3 |
Tesla
TSLA
|
+$19.8M |
| 4 |
Netflix
NFLX
|
+$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
+$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
701
Burlington
BURL
$17.9B
| $223K | ﹤0.01% |
1,482
-6,804
| -82% | -$1.02M |
|
702
Direxion Daily S&P Oil & Gas Exp & Prod Bull 2X Shares
GUSH
$241M
| $223K | ﹤0.01% |
55
+32
| +139% | +$130K |
|
|
ZEN
703
DELISTED
ZENDESK INC
ZEN
| $222K | ﹤0.01% |
4,087
-12,717
| -76% | -$691K |
|
|
AFSI
704
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $221K | ﹤0.01% |
+15,233
| New | +$221K |
|
705
Peabody Energy
BTU
$2.25B
| $220K | ﹤0.01% |
+4,838
| New | +$220K |
|
|
XCRA
706
DELISTED
Xcerra Corporation
XCRA
| $220K | ﹤0.01% |
15,788
+8,955
| +131% | +$125K |
|
707
Kearny Financial
KRNY
$415M
| $218K | ﹤0.01% |
16,232
+15,145
| +1,393% | +$203K |
|
708
Pixelworks
PXLW
$58.7M
| $218K | ﹤0.01% |
5,052
+4,318
| +588% | +$186K |
|
709
Edison International
EIX
$20.9B
| $217K | ﹤0.01% |
3,443
-3,658
| -52% | -$231K |
|
|
CY
710
DELISTED
Cypress Semiconductor
CY
| $217K | ﹤0.01% |
+13,940
| New | +$217K |
|
711
iShares MSCI BIC ETF
BKF
$92.5M
| $216K | ﹤0.01% |
+5,145
| New | +$216K |
|
712
Sunoco
SUN
$6.98B
| $216K | ﹤0.01% |
+8,674
| New | +$216K |
|
|
ETP
713
DELISTED
Energy Transfer Partners, L.P.
ETP
| $216K | ﹤0.01% |
11,378
-27,786
| -71% | -$527K |
|
714
Cal-Maine
CALM
$5.34B
| $215K | ﹤0.01% |
4,711
-1,096
| -19% | -$50K |
|
|
VRAY
715
DELISTED
ViewRay, Inc.
VRAY
| $215K | ﹤0.01% |
31,079
+12,570
| +68% | +$87K |
|
|
INXN
716
DELISTED
Interxion Holding N.V.
INXN
| $215K | ﹤0.01% |
+3,459
| New | +$215K |
|
717
Safe Bulkers
SB
$461M
| $214K | ﹤0.01% |
63,007
+16,782
| +36% | +$57K |
|
718
CBRE Group
CBRE
$48.2B
| $213K | ﹤0.01% |
+4,466
| New | +$213K |
|
719
Noodles & Co
NDLS
$31.1M
| $212K | ﹤0.01% |
17,245
+3,435
| +25% | +$42.2K |
|
720
Banco Santander
SAN
$145B
| $212K | ﹤0.01% |
41,568
+24,721
| +147% | +$126K |
|
721
Trex
TREX
$6.51B
| $212K | ﹤0.01% |
6,798
+1,398
| +26% | +$43.6K |
|
|
JAG
722
DELISTED
Jagged Peak Energy Inc.
JAG
| $211K | ﹤0.01% |
16,212
+9,085
| +127% | +$118K |
|
723
Iovance Biotherapeutics
IOVA
$850M
| $210K | ﹤0.01% |
16,429
-29,690
| -64% | -$380K |
|
724
Progress Software
PRGS
$1.85B
| $209K | ﹤0.01% |
5,394
-11,157
| -67% | -$432K |
|
725
HUB Group
HUBG
$2.25B
| $208K | ﹤0.01% |
8,360
+7,012
| +520% | +$174K |
|