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 | |
|---|---|---|---|---|---|---|
2951
CALL
Plains GP Holdings
PAGP
$5.2B
| $777K | ﹤0.01% |
71,300
+37,600
| +112% | +$431K |
|
2952
PUT
Sprout Social
SPT
$524M
| $776K | ﹤0.01% |
12,800
+1,400
| +12% | +$84.2K |
|
|
MAXR
2953
PUT
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $776K | ﹤0.01% |
41,500
+32,400
| +356% | +$795K |
|
2954
PUT
Box
BOX
$4.36B
| $775K | ﹤0.01% |
31,800
+17,000
| +115% | +$468K |
|
2955
CALL
Bank OZK
OZK
$5.6B
| $775K | ﹤0.01% |
19,600
+8,700
| +80% | +$350K |
|
2956
PUT
Icahn Enterprises
IEP
$5.26B
| $774K | ﹤0.01% |
15,600
+1,000
| +7% | +$51.6K |
|
|
NVRO
2957
DELISTED
NEVRO CORP.
NVRO
| $773K | ﹤0.01% |
+16,599
| New | +$770K |
|
2958
CALL
Atomera
ATOM
$186M
| $772K | ﹤0.01% |
76,300
+29,700
| +64% | +$351K |
|
2959
CALL
Gogo Inc
GOGO
$546M
| $772K | ﹤0.01% |
63,700
-36,100
| -36% | -$549K |
|
|
CALY
2960
PUT
Callaway Golf Company
CALY
$3.28B
| $772K | ﹤0.01% |
40,100
+4,500
| +13% | +$99.4K |
|
2961
PUT
Intellia Therapeutics
NTLA
$1.51B
| $772K | ﹤0.01% |
13,800
-28,700
| -68% | -$1.78M |
|
2962
First Trust Health Care AlphaDEX Fund
FXH
$1.04B
| $771K | ﹤0.01% |
7,940
+2,368
| +42% | +$249K |
|
2963
T. Rowe Price
TROW
$26B
| $770K | ﹤0.01% |
+7,333
| New | +$875K |
|
|
DO
2964
CALL
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $769K | ﹤0.01% |
116,100
-190,400
| -62% | -$1.28M |
|
2965
PUT
MasTec
MTZ
$24.7B
| $768K | ﹤0.01% |
12,100
-20,100
| -62% | -$1.56M |
|
2966
PUT
Ollie's Bargain Outlet
OLLI
$4.19B
| $768K | ﹤0.01% |
14,900
+3,300
| +28% | +$204K |
|
|
ME
2967
PUT
DELISTED
23andMe Holding Co
ME
| $768K | ﹤0.01% |
13,430
-800
| -6% | -$52.4K |
|
2968
Delek Logistics
DKL
$3.08B
| $767K | ﹤0.01% |
15,072
+9,190
| +156% | +$500K |
|
2969
CALL
Service Corp International
SCI
$11.7B
| $767K | ﹤0.01% |
13,300
-45,300
| -77% | -$2.98M |
|
2970
CALL
DHT Holdings
DHT
$3B
| $765K | ﹤0.01% |
101,300
-34,400
| -25% | -$258K |
|
2971
CALL
Photronics
PLAB
$1.7B
| $763K | ﹤0.01% |
52,200
+32,500
| +165% | +$639K |
|
2972
CALL
Upwork
UPWK
$1.2B
| $762K | ﹤0.01% |
56,000
+7,000
| +14% | +$132K |
|
2973
CALL
Franklin Resources
BEN
$17.3B
| $761K | ﹤0.01% |
35,400
-27,000
| -43% | -$694K |
|
2974
CALL
VanEck Energy Income ETF
EINC
$77.1M
| $760K | ﹤0.01% |
112,800
+10,900
| +11% | +$671K |
|
2975
Innoviz Technologies
INVZ
$98.8M
| $760K | ﹤0.01% |
146,017
-2,540
| -2% | -$12.2K |
|
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.