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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7201
CALL
Heron Therapeutics
HRTX
$93M
| $14K | ﹤0.01% |
5,900
+600
| +11% | +$1.93K |
|
7202
PUT
Intapp
INTA
$2.52B
| $14K | ﹤0.01% |
600
-200
| -25% | -$4.42K |
|
|
JAMF
7203
PUT
DELISTED
Jamf
JAMF
| $14K | ﹤0.01% |
700
+200
| +40% | +$4.4K |
|
7204
CALL
Janux Therapeutics
JANX
$919M
| $14K | ﹤0.01% |
1,100
+100
| +10% | +$1.46K |
|
|
LADR
7205
PUT
Ladder Capital
LADR
$1.21B
| $14K | ﹤0.01% |
1,400
-8,500
| -86% | -$88.1K |
|
7206
PUT
908 Devices
MASS
$326M
| $14K | ﹤0.01% |
1,900
-200
| -10% | -$2.42K |
|
7207
CALL
MeiraGTx Holdings
MGTX
$1.09B
| $14K | ﹤0.01% |
2,300
-4,100
| -64% | -$28.1K |
|
|
7208
MeiraGTx Holdings
MGTX
$1.09B
| $14K | ﹤0.01% |
+2,207
| New | +$15.1K |
|
7209
Marten Transport
MRTN
$1.21B
| $14K | ﹤0.01% |
+752
| New | +$15K |
|
7210
CALL
Mine Safety
MSA
$7.44B
| $14K | ﹤0.01% |
100
| – | – |
|
7211
NanoViricides
NNVC
$38.8M
| $14K | ﹤0.01% |
12,639
-1,490
| -11% | -$2.32K |
|
7212
PUT
Oil States International
OIS
$492M
| $14K | ﹤0.01% |
1,900
+1,200
| +171% | +$7.42K |
|
7213
Opendoor
OPEN
$3.64B
| $14K | ﹤0.01% |
12,607
-11,746
| -48% | -$22.5K |
|
7214
PUT
Organogenesis Holdings
ORGO
$302M
| $14K | ﹤0.01% |
+5,500
| New | +$16K |
|
7215
PUT
Open Text
OTEX
$6.14B
| $14K | ﹤0.01% |
500
-400
| -44% | -$11.3K |
|
7216
CALL
Vaxcyte
PCVX
$7.8B
| $14K | ﹤0.01% |
300
-1,200
| -80% | -$47.1K |
|
7217
PUT
Pagaya Technologies
PGY
$1.59B
| $14K | ﹤0.01% |
958
-1,467
| -60% | -$20.3K |
|
7218
Park Hotels & Resorts
PK
$3.03B
| $14K | ﹤0.01% |
+1,240
| New | +$15.1K |
|
7219
Park-Ohio Holdings
PKOH
$575M
| $14K | ﹤0.01% |
1,195
+1,057
| +766% | +$13.2K |
|
7220
CALL
Douglas Dynamics
PLOW
$1.02B
| $14K | ﹤0.01% |
+400
| New | +$14.1K |
|
7221
CALL
Powell Industries
POWL
$7.64B
| $14K | ﹤0.01% |
1,200
| – | – |
|
7222
CALL
Porch Group
PRCH
$1.63B
| $14K | ﹤0.01% |
7,500
+400
| +6% | +$706 |
|
7223
Invesco Energy Exploration & Production ETF
PXE
$89.6M
| $14K | ﹤0.01% |
490
-3,360
| -87% | -$107K |
|
|
RTB
7224
PUT
RTB Digital
RTB
$216M
| $14K | ﹤0.01% |
91
-33
| -27% | -$9.28K |
|
7225
ProShares UltraShort Utilities
SDP
$4.11M
| $14K | ﹤0.01% |
345
+283
| +456% | +$13.6K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.