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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CGC
601
Canopy Growth
CGC
$434M
| $464K | ﹤0.01% |
+17,025
| New | +$464K |
|
602
Bausch + Lomb
BLCO
$5.31B
| $463K | ﹤0.01% |
30,224
+15,816
| +110% | +$242K |
|
603
Shift4
FOUR
$5.87B
| $462K | ﹤0.01% |
10,371
-12,999
| -56% | -$579K |
|
604
Leidos
LDOS
$23.1B
| $462K | ﹤0.01% |
+5,284
| New | +$462K |
|
605
Winnebago Industries
WGO
$953M
| $459K | ﹤0.01% |
+8,634
| New | +$459K |
|
606
Unum
UNM
$12.6B
| $458K | ﹤0.01% |
+11,828
| New | +$458K |
|
607
Vanguard Mid-Cap Value ETF
VOE
$18.7B
| $458K | ﹤0.01% |
+3,764
| New | +$458K |
|
608
Trex
TREX
$6.43B
| $456K | ﹤0.01% |
10,383
+1,528
| +17% | +$67.1K |
|
609
Radware
RDWR
$1.1B
| $455K | ﹤0.01% |
20,915
+19,079
| +1,039% | +$415K |
|
610
Toyota
TM
$257B
| $453K | ﹤0.01% |
+3,481
| New | +$453K |
|
|
RSX
611
DELISTED
VanEck Russia ETF
RSX
| $451K | ﹤0.01% |
79,920
-29,700
| -27% | -$168K |
|
612
Agios Pharmaceuticals
AGIO
$2.07B
| $447K | ﹤0.01% |
15,807
+5,997
| +61% | +$170K |
|
613
ACM Research
ACMR
$1.8B
| $445K | ﹤0.01% |
35,715
+22,357
| +167% | +$279K |
|
614
Denison Mines
DNN
$2.2B
| $443K | ﹤0.01% |
372,564
+197,360
| +113% | +$235K |
|
615
Mohawk Industries
MHK
$8.41B
| $442K | ﹤0.01% |
+4,857
| New | +$442K |
|
616
Warner Music
WMG
$17.6B
| $442K | ﹤0.01% |
19,057
+12,790
| +204% | +$297K |
|
617
H&R Block
HRB
$6.73B
| $439K | ﹤0.01% |
10,328
-13,687
| -57% | -$582K |
|
618
Companhia Siderúrgica Nacional
SID
$1.99B
| $439K | ﹤0.01% |
+184,863
| New | +$439K |
|
619
Zimmer Biomet
ZBH
$20.3B
| $439K | ﹤0.01% |
+4,204
| New | +$439K |
|
620
Manhattan Associates
MANH
$12.8B
| $437K | ﹤0.01% |
+3,291
| New | +$437K |
|
621
Axon Enterprise
AXON
$58.7B
| $434K | ﹤0.01% |
3,753
-1,834
| -33% | -$212K |
|
|
FRG
622
DELISTED
Franchise Group, Inc.
FRG
| $434K | ﹤0.01% |
+17,901
| New | +$434K |
|
623
Acadia Realty Trust
AKR
$2.54B
| $433K | ﹤0.01% |
+34,374
| New | +$433K |
|
624
Kosmos Energy
KOS
$832M
| $431K | ﹤0.01% |
83,436
+16,336
| +24% | +$84.4K |
|
|
NLSN
625
DELISTED
Nielsen Holdings plc
NLSN
| $431K | ﹤0.01% |
+15,564
| New | +$431K |
|