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 |
NVIDIA
NVDA
|
+$216M |
| 2 |
Apple
AAPL
|
+$159M |
| 3 |
Broadcom
AVGO
|
+$128M |
| 4 |
Booking.com
BKNG
|
+$62.2M |
| 5 |
SPDR S&P 500 ETF Trust
SPY
|
+$61.9M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$141M |
| 2 |
Amazon
AMZN
|
+$53.1M |
| 3 |
TSMC
TSM
|
+$45.7M |
| 4 |
Netflix
NFLX
|
+$45.3M |
| 5 |
Pfizer
PFE
|
+$38.3M |
Sector Composition
| 1 | Technology | 34.74% |
| 2 | Communication Services | 9% |
| 3 | Consumer Discretionary | 8.67% |
| 4 | Healthcare | 8.07% |
| 5 | Financials | 6.4% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
601
Globalstar
GSAT
$4.68B
| $516K | ﹤0.01% |
21,925
+5,711
| +35% | +$134K |
|
602
Progressive
PGR
$143B
| $516K | ﹤0.01% |
+1,935
| New | +$516K |
|
603
Similarweb
SMWB
$855M
| $515K | ﹤0.01% |
65,770
+25,456
| +63% | +$199K |
|
|
CMPS
604
Compass Pathways
CMPS
$478M
| $512K | ﹤0.01% |
183,031
+134,380
| +276% | +$376K |
|
605
Weyerhaeuser
WY
$18.7B
| $511K | ﹤0.01% |
+19,929
| New | +$511K |
|
606
Ardelyx
ARDX
$1.59B
| $508K | ﹤0.01% |
129,681
-213,693
| -62% | -$837K |
|
607
Antero Midstream
AM
$8.66B
| $506K | ﹤0.01% |
+26,747
| New | +$506K |
|
608
Western Union
WU
$2.79B
| $506K | ﹤0.01% |
+60,132
| New | +$506K |
|
609
Copa Holdings
CPA
$4.73B
| $499K | ﹤0.01% |
4,539
+2,187
| +93% | +$240K |
|
610
Direxion Daily Energy Bull 2X Shares
ERX
$217M
| $499K | ﹤0.01% |
9,728
-7,875
| -45% | -$404K |
|
611
Planet Labs
PL
$2.74B
| $498K | ﹤0.01% |
81,781
+38,677
| +90% | +$236K |
|
612
Icahn Enterprises
IEP
$4.83B
| $497K | ﹤0.01% |
+61,824
| New | +$497K |
|
613
Iovance Biotherapeutics
IOVA
$858M
| $492K | ﹤0.01% |
286,589
+244,025
| +573% | +$419K |
|
614
Roivant Sciences
ROIV
$8.82B
| $487K | ﹤0.01% |
43,256
-72,948
| -63% | -$821K |
|
615
Alaska Air
ALK
$7.34B
| $486K | ﹤0.01% |
9,829
-1,502
| -13% | -$74.3K |
|
616
Gartner
IT
$18.7B
| $485K | ﹤0.01% |
1,200
-5,954
| -83% | -$2.41M |
|
617
ProShares UltraShort S&P500
SDS
$478M
| $485K | ﹤0.01% |
29,176
+22,716
| +352% | +$378K |
|
618
APA Corp
APA
$7.75B
| $483K | ﹤0.01% |
26,431
-418
| -2% | -$7.64K |
|
619
Neurocrine Biosciences
NBIX
$14.3B
| $483K | ﹤0.01% |
3,843
+1,443
| +60% | +$181K |
|
620
Amplify Cybersecurity ETF
HACK
$2.32B
| $482K | ﹤0.01% |
5,583
+876
| +19% | +$75.6K |
|
621
Direxion Daily Junior Gold Miners Index Bull 2X Shares
JNUG
$468M
| $481K | ﹤0.01% |
+6,063
| New | +$481K |
|
|
CGAU
622
Centerra Gold
CGAU
$1.8B
| $480K | ﹤0.01% |
66,696
+57,199
| +602% | +$412K |
|
623
NETGEAR
NTGR
$817M
| $480K | ﹤0.01% |
16,519
-30,936
| -65% | -$899K |
|
624
Macy's
M
$4.57B
| $479K | ﹤0.01% |
41,145
-117,141
| -74% | -$1.36M |
|
625
Structure Therapeutics
GPCR
$1.2B
| $478K | ﹤0.01% |
23,094
+2,490
| +12% | +$51.5K |
|