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 | |
|---|---|---|---|---|---|---|
4576
PUT
Xencor
XNCR
$1.5B
| $205K | ﹤0.01% |
7,900
+7,600
| +2,533% | +$218K |
|
4577
CALL
CRA International
CRAI
$1.16B
| $204K | ﹤0.01% |
2,300
-200
| -8% | -$18.4K |
|
4578
Janus International
JBI
$700M
| $204K | ﹤0.01% |
+22,910
| New | +$232K |
|
|
LOGC
4579
PUT
DELISTED
ContextLogic
LOGC
| $204K | ﹤0.01% |
9,277
+770
| +9% | +$31.9K |
|
4580
Fulgent Genetics
FLGT
$470M
| $203K | ﹤0.01% |
+5,336
| New | +$268K |
|
4581
CALL
Cartesian Therapeutics
RNAC
$229M
| $203K | ﹤0.01% |
4,130
-1,097
| -21% | -$60.3K |
|
4582
PUT
Red Robin
RRGB
$145M
| $203K | ﹤0.01% |
30,300
+19,200
| +173% | +$157K |
|
4583
PUT
Super Micro Computer
SMCI
$18.4B
| $203K | ﹤0.01% |
37,000
+6,000
| +19% | +$34.2K |
|
4584
Smith & Nephew
SNN
$13.3B
| $203K | ﹤0.01% |
+8,785
| New | +$225K |
|
4585
CALL
Global Partners
GLP
$1.68B
| $202K | ﹤0.01% |
8,200
+1,600
| +24% | +$43K |
|
4586
CALL
Globus Medical
GMED
$10.7B
| $202K | ﹤0.01% |
3,400
+2,400
| +240% | +$145K |
|
4587
CALL
MakeMyTrip
MMYT
$5.36B
| $202K | ﹤0.01% |
6,600
+1,700
| +35% | +$52.5K |
|
4588
PUT
Movado Group
MOV
$849M
| $202K | ﹤0.01% |
7,200
+6,100
| +555% | +$200K |
|
4589
CALL
MaxLinear
MXL
$6.06B
| $202K | ﹤0.01% |
6,200
+4,700
| +313% | +$174K |
|
|
SF
4590
CALL
Stifel
SF
$12.6B
| $202K | ﹤0.01% |
5,850
+4,500
| +333% | +$177K |
|
4591
Solid Power
SLDP
$463M
| $202K | ﹤0.01% |
+38,535
| New | +$243K |
|
|
TPH
4592
CALL
DELISTED
Tri Pointe Homes
TPH
| $202K | ﹤0.01% |
13,400
+6,800
| +103% | +$120K |
|
4593
CALL
CareTrust REIT
CTRE
$9.91B
| $201K | ﹤0.01% |
11,100
+5,000
| +82% | +$102K |
|
4594
PUT
Ingredion
INGR
$6.27B
| $201K | ﹤0.01% |
2,500
+2,100
| +525% | +$184K |
|
4595
PUT
Kontoor Brands
KTB
$4.63B
| $201K | ﹤0.01% |
6,000
+700
| +13% | +$25.9K |
|
4596
New Fortress Energy
NFE
$92.1M
| $201K | ﹤0.01% |
4,611
+3,173
| +221% | +$159K |
|
|
4597
PUT
Global Partners
GLP
$1.68B
| $200K | ﹤0.01% |
8,100
+4,800
| +145% | +$129K |
|
|
RC
4598
Ready Capital
RC
$258M
| $200K | ﹤0.01% |
19,746
-43,547
| -69% | -$564K |
|
|
SWN
4599
DELISTED
Southwestern Energy Company
SWN
| $200K | ﹤0.01% |
32,822
-96,378
| -75% | -$667K |
|
|
EGIO
4600
PUT
DELISTED
Edgio, Inc. Common Stock
EGIO
| $200K | ﹤0.01% |
1,805
-225
| -11% | -$26.6K |
|
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.