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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3726
G-III Apparel Group
GIII
$1.54B
| $400K | ﹤0.01% |
26,775
+21,759
| +434% | +$444K |
|
|
AMPS
3727
CALL
DELISTED
Altus Power
AMPS
| $400K | ﹤0.01% |
36,400
+21,000
| +136% | +$200K |
|
3728
CALL
Compass
COMP
$8.51B
| $399K | ﹤0.01% |
172,000
-8,300
| -5% | -$29.5K |
|
3729
PUT
LSB Industries
LXU
$783M
| $399K | ﹤0.01% |
28,000
+27,100
| +3,011% | +$384K |
|
3730
Synaptics
SYNA
$4.19B
| $399K | ﹤0.01% |
4,035
+2,761
| +217% | +$343K |
|
3731
Adtran
ADTN
$689M
| $398K | ﹤0.01% |
+20,339
| New | +$444K |
|
3732
PUT
Targa Resources
TRGP
$58B
| $398K | ﹤0.01% |
6,600
-16,600
| -72% | -$1.09M |
|
3733
Equity Residential
EQR
$24.9B
| $397K | ﹤0.01% |
+5,907
| New | +$437K |
|
3734
PUT
iShares S&P GSCI Commodity-Indexed Trust
GSG
$998M
| $397K | ﹤0.01% |
19,300
-69,800
| -78% | -$1.54M |
|
3735
PUT
Varonis Systems
VRNS
$4.59B
| $397K | ﹤0.01% |
15,000
+8,400
| +127% | +$240K |
|
|
SAVE
3736
DELISTED
Spirit Airlines, Inc.
SAVE
| $397K | ﹤0.01% |
21,110
-17,488
| -45% | -$410K |
|
|
FIRY
3737
CALL
Firy Inc
FIRY
$148M
| $396K | ﹤0.01% |
19,450
-7,100
| -27% | -$200K |
|
3738
CALL
Zymeworks
ZYME
$1.61B
| $396K | ﹤0.01% |
64,400
+60,300
| +1,471% | +$363K |
|
|
SBOW
3739
CALL
DELISTED
SilverBow Resources, Inc.
SBOW
| $395K | ﹤0.01% |
14,700
+9,500
| +183% | +$345K |
|
|
SDC
3740
CALL
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $395K | ﹤0.01% |
436,600
+111,000
| +34% | +$135K |
|
|
SVFAU
3741
CALL
DELISTED
SVF Investment Corp. Unit
SVFAU
| $395K | ﹤0.01% |
39,700
-79,600
| -67% | -$790K |
|
|
PLCY
3742
CALL
DELISTED
EventShares U.S. Legislative Opportunities ETF
PLCY
| $394K | ﹤0.01% |
53,100
+3,400
| +7% | +$25.2K |
|
|
SAFE
3743
DELISTED
Safehold Inc.
SAFE
| $394K | ﹤0.01% |
14,893
+6,931
| +87% | +$270K |
|
3744
PUT
ImmunityBio
IBRX
$7.51B
| $393K | ﹤0.01% |
79,100
+55,700
| +238% | +$254K |
|
3745
PUT
Malibu Boats
MBUU
$541M
| $393K | ﹤0.01% |
8,200
-17,100
| -68% | -$1.01M |
|
3746
Maravai LifeSciences
MRVI
$969M
| $393K | ﹤0.01% |
15,398
+10,848
| +238% | +$272K |
|
3747
CALL
Blackbaud
BLKB
$1.94B
| $392K | ﹤0.01% |
8,900
-12,700
| -59% | -$685K |
|
|
VIP
3748
Vulcan Infrastructure and Power Inc. Class A Common Stock
VIP
$38.1M
| $392K | ﹤0.01% |
19,614
+1,749
| +10% | +$48.2K |
|
3749
Outdoor Holding Co
POWW
$249M
| $392K | ﹤0.01% |
134,038
-16,846
| -11% | -$71.9K |
|
|
ALLK
3750
CALL
DELISTED
Allakos
ALLK
| $391K | ﹤0.01% |
64,000
+56,800
| +789% | +$238K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.