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 | |
|---|---|---|---|---|---|---|
3901
CALL
Synaptics
SYNA
$4.19B
| $346K | ﹤0.01% |
3,500
-5,700
| -62% | -$707K |
|
|
ESPR
3902
PUT
DELISTED
Esperion Therapeutics
ESPR
| $345K | ﹤0.01% |
51,500
-55,400
| -52% | -$380K |
|
3903
PUT
HEICO Corp Class A
HEI.A
$36B
| $345K | ﹤0.01% |
+2,400
| New | +$289K |
|
3904
PUT
Neogen
NEOG
$2.63B
| $345K | ﹤0.01% |
24,700
+24,600
| +24,600% | +$495K |
|
3905
CALL
Phillips Edison & Co
PECO
$5.46B
| $345K | ﹤0.01% |
12,300
-34,100
| -73% | -$1.12M |
|
3906
CALL
International Seaways
INSW
$4.76B
| $344K | ﹤0.01% |
9,800
-2,700
| -22% | -$74.7K |
|
3907
CALL
Centrus Energy
LEU
$3.48B
| $344K | ﹤0.01% |
8,400
+4,700
| +127% | +$181K |
|
|
SJT
3908
PUT
San Juan Basin Royalty Trust
SJT
$117M
| $344K | ﹤0.01% |
36,700
+5,200
| +17% | +$61.2K |
|
3909
Encompass Health
EHC
$11B
| $343K | ﹤0.01% |
+7,588
| New | +$380K |
|
|
EVRI
3910
CALL
DELISTED
Everi Holdings
EVRI
| $343K | ﹤0.01% |
21,200
+11,500
| +119% | +$212K |
|
3911
United Parks & Resorts
PRKS
$2.1B
| $343K | ﹤0.01% |
7,550
-61,007
| -89% | -$3.04M |
|
|
CSSE
3912
DELISTED
Chicken Soup for the Soul Entertainment, Inc. Class A Common Stock
CSSE
| $343K | ﹤0.01% |
49,905
+27,348
| +121% | +$253K |
|
3913
CALL
NextDecade
NEXT
$1.79B
| $342K | ﹤0.01% |
56,900
-54,800
| -49% | -$364K |
|
|
ME
3914
DELISTED
23andMe Holding Co
ME
| $342K | ﹤0.01% |
5,979
-141
| -2% | -$9.23K |
|
|
DCPH
3915
CALL
DELISTED
Deciphera Pharmaceuticals, Inc. Common Stock
DCPH
| $342K | ﹤0.01% |
18,500
-88,700
| -83% | -$1.39M |
|
3916
CALL
BridgeBio Pharma
BBIO
$15.7B
| $341K | ﹤0.01% |
34,400
-55,300
| -62% | -$575K |
|
3917
PUT
Vertical Aerospace
EVTL
$158M
| $341K | ﹤0.01% |
3,650
+3,190
| +693% | +$200K |
|
3918
iShares Russell Mid-Cap ETF
IWR
$56B
| $341K | ﹤0.01% |
+5,497
| New | +$378K |
|
|
BINI
3919
PUT
DELISTED
Bollinger Innovations
BINI
| – | – |
0
| – | – |
|
3920
PUT
Harrow
HROW
$1.45B
| $340K | ﹤0.01% |
28,200
+5,000
| +22% | +$40.6K |
|
|
SA
3921
CALL
Seabridge Gold
SA
$2.78B
| $340K | ﹤0.01% |
28,700
+21,400
| +293% | +$271K |
|
|
DOO
3922
CALL
Bombardier Recreational Products
DOO
$4.54B
| $338K | ﹤0.01% |
5,500
-2,600
| -32% | -$184K |
|
|
HIMX
3923
Himax Technologies
HIMX
$2.19B
| $338K | ﹤0.01% |
69,886
-242,364
| -78% | -$1.54M |
|
3924
CALL
PLAYSTUDIOS Inc
MYPS
$77.9M
| $338K | ﹤0.01% |
97,100
-10,800
| -10% | -$41.2K |
|
3925
CALL
iQIYI
IQ
$1.23B
| $337K | ﹤0.01% |
124,700
-180,600
| -59% | -$670K |
|
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.