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 | |
|---|---|---|---|---|---|---|
4151
PUT
iShares Gold Trust
IAU
$62.9B
| $283K | ﹤0.01% |
9,000
+600
| +7% | +$19.7K |
|
4152
PUT
Kosmos Energy
KOS
$1.6B
| $283K | ﹤0.01% |
54,800
-28,400
| -34% | -$172K |
|
4153
CALL
SiTime
SITM
$16B
| $283K | ﹤0.01% |
3,600
+2,900
| +414% | +$374K |
|
4154
CALL
Arch Capital
ACGL
$34.3B
| $282K | ﹤0.01% |
6,200
-2,000
| -24% | -$90.4K |
|
4155
Ardmore Shipping
ASC
$710M
| $282K | ﹤0.01% |
30,925
+12,020
| +64% | +$107K |
|
4156
PUT
Joby Aviation
JOBY
$7.03B
| $282K | ﹤0.01% |
65,200
-55,100
| -46% | -$302K |
|
4157
PUT
US Foods
USFD
$22.2B
| $282K | ﹤0.01% |
10,700
-3,700
| -26% | -$115K |
|
|
DO
4158
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $282K | ﹤0.01% |
+42,539
| New | +$287K |
|
4159
CALL
Ironwood Pharmaceuticals
IRWD
$696M
| $281K | ﹤0.01% |
27,200
+1,600
| +6% | +$18.1K |
|
4160
CALL
Mitek Systems
MITK
$754M
| $281K | ﹤0.01% |
30,700
-15,500
| -34% | -$156K |
|
4161
CALL
Blue Owl Capital
OBDC
$5.34B
| $281K | ﹤0.01% |
27,100
| – | – |
|
4162
CALL
Safe Bulkers
SB
$795M
| $281K | ﹤0.01% |
114,100
-26,200
| -19% | -$88.6K |
|
|
SHCO
4163
CALL
DELISTED
Soho House & Co
SHCO
| $281K | ﹤0.01% |
59,700
+59,100
| +9,850% | +$371K |
|
4164
PUT
Cricut
CRCT
$984M
| $280K | ﹤0.01% |
30,300
+9,300
| +44% | +$68.2K |
|
|
DX
4165
CALL
Dynex Capital
DX
$3.15B
| $280K | ﹤0.01% |
24,100
+2,900
| +14% | +$45.3K |
|
4166
CALL
Coca-Cola Femsa
KOF
$22.7B
| $280K | ﹤0.01% |
4,800
+4,300
| +860% | +$256K |
|
4167
CALL
Maravai LifeSciences
MRVI
$969M
| $280K | ﹤0.01% |
11,000
+10,700
| +3,567% | +$268K |
|
4168
Oramed Pharmaceuticals
ORMP
$167M
| $280K | ﹤0.01% |
43,218
+22,855
| +112% | +$185K |
|
4169
Energy Fuels
UUUU
$2.86B
| $280K | ﹤0.01% |
45,835
-40,082
| -47% | -$256K |
|
4170
CALL
Dorchester Minerals
DMLP
$1.33B
| $279K | ﹤0.01% |
11,200
+6,000
| +115% | +$164K |
|
4171
Olin
OLN
$2.11B
| $279K | ﹤0.01% |
6,514
-5,813
| -47% | -$295K |
|
4172
CALL
Westlake Chemical Partners
WLKP
$763M
| $279K | ﹤0.01% |
13,000
-15,000
| -54% | -$362K |
|
4173
PUT
Church & Dwight Co
CHD
$23.4B
| $278K | ﹤0.01% |
3,900
-14,400
| -79% | -$1.24M |
|
4174
PUT
Eagle Materials
EXP
$6.29B
| $278K | ﹤0.01% |
2,600
+1,200
| +86% | +$144K |
|
|
MOMO
4175
Hello Group
MOMO
$885M
| $278K | ﹤0.01% |
60,243
-35,230
| -37% | -$169K |
|
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.