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 | |
|---|---|---|---|---|---|---|
|
AGNT
7501
AGNT Inc
AGNT
$641M
| $20K | ﹤0.01% |
1,798
-945
| -34% | -$13.2K |
|
7502
CALL
Fidus Investment
FDUS
$755M
| $20K | ﹤0.01% |
1,200
-1,600
| -57% | -$30.3K |
|
7503
PUT
Cedar Fair
FUN
$1.81B
| $20K | ﹤0.01% |
500
-1,500
| -75% | -$63.8K |
|
7504
PUT
StealthGas
GASS
$329M
| $20K | ﹤0.01% |
8,000
| – | – |
|
|
GMS
7505
PUT
DELISTED
GMS Inc
GMS
| $20K | ﹤0.01% |
500
-1,600
| -76% | -$76.5K |
|
7506
CALL
iPath Series B Carbon Exchange-Traded Notes
GRN
$23.8M
| $20K | ﹤0.01% |
800
-800
| -50% | -$25.2K |
|
7507
CALL
Good Times Restaurants
GTIM
$14.8M
| $20K | ﹤0.01% |
9,500
+8,400
| +764% | +$24.6K |
|
7508
HighPeak Energy
HPK
$838M
| $20K | ﹤0.01% |
+960
| New | +$22.6K |
|
|
HTBK
7509
CALL
DELISTED
Heritage Commerce
HTBK
| $20K | ﹤0.01% |
1,800
+100
| +6% | +$1.15K |
|
|
IGMS
7510
PUT
DELISTED
IGM Biosciences
IGMS
| $20K | ﹤0.01% |
+900
| New | +$18.2K |
|
7511
PUT
First Internet Bancorp
INBK
$229M
| $20K | ﹤0.01% |
+600
| New | +$21.9K |
|
|
INN
7512
CALL
Summit Hotel Properties
INN
$748M
| $20K | ﹤0.01% |
3,100
-27,000
| -90% | -$211K |
|
7513
Disc Medicine
IRON
$3.03B
| $20K | ﹤0.01% |
417
+400
| +2,353% | +$18.9K |
|
7514
PUT
JELD-WEN Holding
JELD
$117M
| $20K | ﹤0.01% |
2,300
-8,300
| -78% | -$109K |
|
7515
PUT
KALA BIO
KALA
$13.6M
| $20K | ﹤0.01% |
3
+2
| +200% | +$1.57K |
|
7516
PUT
KT
KT
$8.8B
| $20K | ﹤0.01% |
1,700
+300
| +21% | +$4.13K |
|
7517
PUT
LifeMD
LFMD
$176M
| $20K | ﹤0.01% |
10,200
| – | – |
|
7518
CALL
Martin Midstream Partners
MMLP
$93M
| $20K | ﹤0.01% |
6,000
+1,500
| +33% | +$5.95K |
|
7519
PUT
Mercury Systems
MRCY
$5.76B
| $20K | ﹤0.01% |
500
-11,700
| -96% | -$613K |
|
7520
PUT
Maravai LifeSciences
MRVI
$996M
| $20K | ﹤0.01% |
800
-2,100
| -72% | -$52.7K |
|
7521
PUT
New York Times
NYT
$12.3B
| $20K | ﹤0.01% |
700
-1,600
| -70% | -$48.9K |
|
7522
Oscar Health
OSCR
$9.42B
| $20K | ﹤0.01% |
4,037
-18,126
| -82% | -$106K |
|
7523
Perion Network
PERI
$377M
| $20K | ﹤0.01% |
1,051
-11,148
| -91% | -$225K |
|
7524
Provident Financial Services
PFS
$3.24B
| $20K | ﹤0.01% |
+1,026
| New | +$24K |
|
7525
VanEck Retail ETF
RTH
$250M
| $20K | ﹤0.01% |
+133
| New | +$22.1K |
|
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.