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 | |
|---|---|---|---|---|---|---|
2551
CALL
Iridium Communications
IRDM
$4.87B
| $1.09M | ﹤0.01% |
24,600
+11,600
| +89% | +$503K |
|
2552
PUT
AppFolio
APPF
$5.98B
| $1.09M | ﹤0.01% |
10,400
-500
| -5% | -$51K |
|
2553
CALL
Park Hotels & Resorts
PK
$3.03B
| $1.09M | ﹤0.01% |
96,800
-15,300
| -14% | -$218K |
|
2554
CALL
Rogers Corp
ROG
$2.31B
| $1.09M | ﹤0.01% |
4,500
-4,100
| -48% | -$1.06M |
|
2555
PUT
Annexon
ANNX
$841M
| $1.09M | ﹤0.01% |
175,900
-11,600
| -6% | -$62.7K |
|
2556
PUT
Signet Jewelers
SIG
$3.72B
| $1.09M | ﹤0.01% |
19,000
-10,400
| -35% | -$626K |
|
2557
CALL
Uranium Energy
UEC
$4.9B
| $1.08M | ﹤0.01% |
309,600
-59,100
| -16% | -$226K |
|
|
UNIT
2558
CALL
Uniti Group
UNIT
$2.62B
| $1.08M | ﹤0.01% |
155,700
-130,600
| -46% | -$1.21M |
|
2559
PUT
Warby Parker
WRBY
$3.05B
| $1.08M | ﹤0.01% |
81,100
+44,600
| +122% | +$594K |
|
2560
PUT
Ferguson
FERG
$45.4B
| $1.08M | ﹤0.01% |
10,500
+6,600
| +169% | +$770K |
|
2561
PUT
ArcBest
ARCB
$3.31B
| $1.08M | ﹤0.01% |
14,800
+10,100
| +215% | +$812K |
|
2562
ArcelorMittal
MT
$50.9B
| $1.08M | ﹤0.01% |
54,080
-99,299
| -65% | -$2.27M |
|
2563
PUT
Cinemark Holdings
CNK
$3.93B
| $1.07M | ﹤0.01% |
88,300
-105,500
| -54% | -$1.65M |
|
2564
CALL
YPF
YPF
$20B
| $1.07M | ﹤0.01% |
172,300
+148,600
| +627% | +$711K |
|
2565
PUT
Ormat Technologies
ORA
$6.28B
| $1.07M | ﹤0.01% |
12,400
-24,900
| -67% | -$2.22M |
|
|
PXD
2566
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.07M | ﹤0.01% |
4,936
-11,685
| -70% | -$2.67M |
|
|
HIVE
2567
CALL
HIVE Digital Technologies
HIVE
$789M
| $1.07M | ﹤0.01% |
283,600
-85,400
| -23% | -$387K |
|
2568
iShares US Oil & Gas Exploration & Production ETF
IEO
$558M
| $1.07M | ﹤0.01% |
12,801
-16,095
| -56% | -$1.37M |
|
2569
CALL
Perion Network
PERI
$371M
| $1.07M | ﹤0.01% |
55,300
-19,500
| -26% | -$393K |
|
2570
CALL
Tradeweb Markets
TW
$21.7B
| $1.07M | ﹤0.01% |
18,900
+16,500
| +688% | +$1.12M |
|
2571
CALL
MBIA
MBI
$282M
| $1.06M | ﹤0.01% |
115,800
-91,600
| -44% | -$1.09M |
|
|
DICE
2572
CALL
DELISTED
DICE Therapeutics, Inc. Common Stock
DICE
| $1.06M | ﹤0.01% |
52,500
+49,800
| +1,844% | +$907K |
|
2573
CALL
Chemours
CC
$2.55B
| $1.06M | ﹤0.01% |
43,100
-17,600
| -29% | -$581K |
|
2574
Otis Worldwide
OTIS
$27.9B
| $1.06M | ﹤0.01% |
16,626
-13,855
| -45% | -$1.01M |
|
2575
PUT
SouthState Bank Corp
SSB
$10.2B
| $1.06M | ﹤0.01% |
13,400
-13,800
| -51% | -$1.11M |
|
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.