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 | |
|---|---|---|---|---|---|---|
|
DS
5101
CALL
DELISTED
Drive Shack Inc.
DS
| $136K | ﹤0.01% |
220,700
-38,300
| -15% | -$45.8K |
|
|
ATHX
5102
DELISTED
Athersys, Inc. Common Stock
ATHX
| $136K | ﹤0.01% |
74,019
+69,311
| +1,472% | +$302K |
|
5103
PUT
Butterfly Network
BFLY
$2.19B
| $135K | ﹤0.01% |
28,800
+17,900
| +164% | +$94.5K |
|
5104
CALL
Braze
BRZE
$2.89B
| $135K | ﹤0.01% |
3,900
+3,700
| +1,850% | +$156K |
|
5105
PUT
Cemex
CX
$17.1B
| $135K | ﹤0.01% |
39,500
-62,400
| -61% | -$247K |
|
|
HI
5106
CALL
DELISTED
Hillenbrand
HI
| $135K | ﹤0.01% |
3,700
+3,200
| +640% | +$135K |
|
5107
Honda
HMC
$38.4B
| $135K | ﹤0.01% |
+6,262
| New | +$158K |
|
|
SA
5108
Seabridge Gold
SA
$2.84B
| $135K | ﹤0.01% |
11,380
-3,612
| -24% | -$45.7K |
|
5109
CALL
Supernus Pharmaceuticals
SUPN
$2.67B
| $135K | ﹤0.01% |
4,000
-200
| -5% | -$6.51K |
|
5110
Vertiv
VRT
$101B
| $135K | ﹤0.01% |
13,940
+4,348
| +45% | +$48.8K |
|
|
ASXC
5111
PUT
DELISTED
Asensus Surgical, Inc.
ASXC
| $135K | ﹤0.01% |
301,500
+15,600
| +5% | +$8.13K |
|
|
SUNW
5112
CALL
DELISTED
Sunworks, Inc.
SUNW
| $135K | ﹤0.01% |
48,600
-9,900
| -17% | -$27.8K |
|
|
KDNY
5113
CALL
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $135K | ﹤0.01% |
6,900
-80,900
| -92% | -$1.62M |
|
|
AJRD
5114
CALL
DELISTED
Aerojet Rocketdyne Holdings
AJRD
| $135K | ﹤0.01% |
3,400
+200
| +6% | +$8.46K |
|
5115
CALL
Sphere 3D
ANY
$18.8M
| $134K | ﹤0.01% |
4,337
+248
| +6% | +$11.2K |
|
5116
Flex
FLEX
$43B
| $134K | ﹤0.01% |
10,674
-202,333
| -95% | -$2.59M |
|
|
GOOD
5117
Gladstone Commercial Corp
GOOD
$604M
| $134K | ﹤0.01% |
8,656
+7,680
| +787% | +$146K |
|
5118
PUT
Kratos Defense & Security Solutions
KTOS
$9.23B
| $134K | ﹤0.01% |
13,200
-1,000
| -7% | -$13.4K |
|
|
MITT
5119
TPG Mortgage Investment Trust
MITT
$227M
| $134K | ﹤0.01% |
32,820
-22,799
| -41% | -$153K |
|
5120
CALL
Precigen
PGEN
$2.36B
| $134K | ﹤0.01% |
63,300
+1,100
| +2% | +$2.32K |
|
|
SHCO
5121
PUT
DELISTED
Soho House & Co
SHCO
| $134K | ﹤0.01% |
+28,400
| New | +$178K |
|
5122
PUT
Sportradar
SRAD
$3.65B
| $134K | ﹤0.01% |
15,300
+12,800
| +512% | +$128K |
|
5123
CALL
Yext
YEXT
$569M
| $134K | ﹤0.01% |
30,100
-1,300
| -4% | -$6.03K |
|
|
GATO
5124
PUT
DELISTED
Gatos Silver, Inc.
GATO
| $134K | ﹤0.01% |
50,300
+300
| +0.6% | +$939 |
|
|
PRTY
5125
DELISTED
Party City Holdco Inc.
PRTY
| $134K | ﹤0.01% |
+85,253
| New | +$143K |
|
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.