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 | |
|---|---|---|---|---|---|---|
5926
ManpowerGroup
MAN
$2.55B
| $73K | ﹤0.01% |
+1,130
| New | +$85K |
|
|
MRSN
5927
CALL
DELISTED
Mersana Therapeutics
MRSN
| $73K | ﹤0.01% |
432
+384
| +800% | +$62.4K |
|
5928
PUT
LHA Market State Tactical Beta ETF
MSTB
$200M
| $73K | ﹤0.01% |
9,700
-1,400
| -13% | -$36.4K |
|
5929
PUT
National Fuel Gas
NFG
$7.75B
| $73K | ﹤0.01% |
1,200
+900
| +300% | +$62.1K |
|
5930
Opendoor
OPEN
$3.97B
| $73K | ﹤0.01% |
24,353
-87,840
| -78% | -$403K |
|
5931
PUT
Pacer Trendpilot US Large Cap ETF
PTLC
$3.37B
| $73K | ﹤0.01% |
1,800
-3,400
| -65% | -$128K |
|
5932
Transact Technologies
TACT
$57.6M
| $73K | ﹤0.01% |
20,013
+13,954
| +230% | +$60.6K |
|
5933
PUT
Tenable Holdings
TENB
$3.96B
| $73K | ﹤0.01% |
2,100
-9,000
| -81% | -$377K |
|
|
ZYXI
5934
DELISTED
Zynex
ZYXI
| $73K | ﹤0.01% |
+8,114
| New | +$70.9K |
|
|
SPPI
5935
CALL
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $73K | ﹤0.01% |
170,600
-1,100
| -0.6% | -$1.08K |
|
|
UMPQ
5936
PUT
DELISTED
Umpqua Holdings Corp
UMPQ
| $73K | ﹤0.01% |
4,300
+500
| +13% | +$8.88K |
|
|
USAK
5937
CALL
DELISTED
USA Truck Inc
USAK
| $73K | ﹤0.01% |
6,100
+2,000
| +49% | +$62.5K |
|
|
CO
5938
CALL
DELISTED
Global Cord Blood Corporation
CO
| $73K | ﹤0.01% |
24,700
+8,900
| +56% | +$21.9K |
|
|
ACLX
5939
DELISTED
Arcellx
ACLX
| $72K | ﹤0.01% |
+3,849
| New | +$73.7K |
|
5940
CALL
Apogee Enterprises
APOG
$888M
| $72K | ﹤0.01% |
1,900
-1,500
| -44% | -$61.1K |
|
5941
ProShares Ultra NASDAQ Biotechnology
BIB
$81.1M
| $72K | ﹤0.01% |
1,514
+1,100
| +266% | +$58.6K |
|
5942
Hyliion Holdings
HYLN
$729M
| $72K | ﹤0.01% |
25,361
-56,704
| -69% | -$207K |
|
5943
CALL
IGC Pharma
IGC
$25.9M
| $72K | ﹤0.01% |
169,200
+5,300
| +3% | +$2.82K |
|
|
INFA
5944
PUT
DELISTED
Informatica
INFA
| $72K | ﹤0.01% |
3,600
+3,400
| +1,700% | +$73.3K |
|
5945
PUT
Jack Henry & Associates
JKHY
$11.1B
| $72K | ﹤0.01% |
+400
| New | +$78.5K |
|
5946
CALL
Napco Security Technologies
NSSC
$1.44B
| $72K | ﹤0.01% |
2,500
+1,300
| +108% | +$34.7K |
|
5947
PUT
NETGEAR
NTGR
$659M
| $72K | ﹤0.01% |
3,600
+1,700
| +89% | +$38.2K |
|
|
OGI
5948
CALL
Organigram Holdings
OGI
$140M
| $72K | ﹤0.01% |
20,825
-9,725
| -32% | -$40.7K |
|
5949
CALL
Pangaea Logistics
PANL
$485M
| $72K | ﹤0.01% |
15,700
+10,500
| +202% | +$51.5K |
|
5950
PUT
Par Pacific Holdings
PARR
$4.16B
| $72K | ﹤0.01% |
+4,400
| New | +$74.7K |
|
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.