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 | |
|---|---|---|---|---|---|---|
726
Bain Capital Specialty
BCSF
$1.01B
| $318K | ﹤0.01% |
26,558
+20,411
| +332% | +$244K |
|
727
LPL Financial
LPLA
$27.8B
| $317K | ﹤0.01% |
1,455
-1,910
| -57% | -$416K |
|
728
ZTO Express
ZTO
$15.5B
| $317K | ﹤0.01% |
13,200
-2,049
| -13% | -$49.2K |
|
729
SiTime
SITM
$6.72B
| $316K | ﹤0.01% |
+4,017
| New | +$316K |
|
730
Mid-America Apartment Communities
MAA
$16.9B
| $315K | ﹤0.01% |
2,032
-3,513
| -63% | -$545K |
|
731
Madrigal Pharmaceuticals
MDGL
$9.79B
| $315K | ﹤0.01% |
4,850
-557
| -10% | -$36.2K |
|
|
HYZN
732
DELISTED
Hyzon Motors Inc. Class A Common Stock
HYZN
| $315K | ﹤0.01% |
+3,706
| New | +$315K |
|
733
Vertical Aerospace
EVTL
$499M
| $314K | ﹤0.01% |
+3,365
| New | +$314K |
|
734
2x Long VIX Futures ETF
UVIX
$426M
| $313K | ﹤0.01% |
45
+12
| +36% | +$83.5K |
|
735
iShares Expanded Tech Sector ETF
IGM
$8.98B
| $311K | ﹤0.01% |
+6,756
| New | +$311K |
|
736
Motorola Solutions
MSI
$81.7B
| $311K | ﹤0.01% |
+1,390
| New | +$311K |
|
737
TAL Education Group
TAL
$6.54B
| $311K | ﹤0.01% |
62,993
+22,654
| +56% | +$112K |
|
738
Netflix
NFLX
$511B
| $310K | ﹤0.01% |
1,320
-77,370
| -98% | -$18.2M |
|
|
SBNY
739
DELISTED
Signature Bank
SBNY
| $310K | ﹤0.01% |
2,059
-1,200
| -37% | -$181K |
|
740
Skywest
SKYW
$4.41B
| $309K | ﹤0.01% |
19,037
+11,966
| +169% | +$194K |
|
741
Teekay
TK
$726M
| $309K | ﹤0.01% |
86,316
-14,750
| -15% | -$52.8K |
|
742
Zevra Therapeutics
ZVRA
$446M
| $309K | ﹤0.01% |
49,593
+17,311
| +54% | +$108K |
|
743
Independence Realty Trust
IRT
$4.14B
| $308K | ﹤0.01% |
18,457
-5,278
| -22% | -$88.1K |
|
744
Knight Transportation
KNX
$6.97B
| $307K | ﹤0.01% |
6,281
+1,284
| +26% | +$62.8K |
|
745
Natera
NTRA
$23.9B
| $307K | ﹤0.01% |
+7,012
| New | +$307K |
|
746
Gerdau
GGB
$6.21B
| $306K | ﹤0.01% |
85,380
-150,531
| -64% | -$540K |
|
747
Under Armour Class C
UA
$2.1B
| $306K | ﹤0.01% |
51,410
+23,054
| +81% | +$137K |
|
748
Ingersoll Rand
IR
$32.2B
| $302K | ﹤0.01% |
+6,987
| New | +$302K |
|
749
Louisiana-Pacific
LPX
$6.81B
| $302K | ﹤0.01% |
+5,905
| New | +$302K |
|
750
Ambev
ABEV
$35.7B
| $300K | ﹤0.01% |
106,352
+25,563
| +32% | +$72.1K |
|