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 | |
|---|---|---|---|---|---|---|
7726
CALL
Mercury Systems
MRCY
$5.41B
| $8K | ﹤0.01% |
200
+100
| +100% | +$4.73K |
|
7727
PUT
Northeast Community Bancorp
NECB
$373M
| $8K | ﹤0.01% |
+600
| New | +$8.27K |
|
7728
PUT
Oaktree Specialty Lending
OCSL
$1.05B
| $8K | ﹤0.01% |
433
+366
| +546% | +$7.37K |
|
7729
CALL
OneWater Marine
ONEW
$211M
| $8K | ﹤0.01% |
300
| – | – |
|
7730
CALL
Oric Pharmaceuticals
ORIC
$1.17B
| $8K | ﹤0.01% |
+1,400
| New | +$4.73K |
|
7731
Pluri
PLUR
$17M
| $8K | ﹤0.01% |
1,108
-25
| -2% | -$163 |
|
7732
PMV Pharmaceuticals
PMVP
$57.1M
| $8K | ﹤0.01% |
+982
| New | +$10.5K |
|
7733
PUT
Outdoor Holding Co
POWW
$249M
| $8K | ﹤0.01% |
5,100
-40,300
| -89% | -$102K |
|
|
PRA
7734
CALL
DELISTED
ProAssurance
PRA
| $8K | ﹤0.01% |
500
-400
| -44% | -$7.88K |
|
|
PRPH
7735
DELISTED
ProPhase Labs
PRPH
| $8K | ﹤0.01% |
85
-26
| -23% | -$2.81K |
|
|
PTN
7736
PUT
Palatin Technologies
PTN
$14.4M
| $8K | ﹤0.01% |
+66
| New | +$14.2K |
|
7737
Invesco Oil & Gas Services ETF
PXJ
$63.3M
| $8K | ﹤0.01% |
336
-97
| -22% | -$2.33K |
|
|
RDNW
7738
PUT
RideNow Group
RDNW
$256M
| $8K | ﹤0.01% |
1,300
+1,100
| +550% | +$11.9K |
|
7739
CALL
ReNew
RNW
$2.18B
| $8K | ﹤0.01% |
1,500
-26,500
| -95% | -$155K |
|
7740
PUT
RXO
RXO
$3.68B
| $8K | ﹤0.01% |
+500
| New | +$8.87K |
|
7741
SGHC Ltd
SGHC
$7.57B
| $8K | ﹤0.01% |
2,802
-4,411
| -61% | -$15.6K |
|
7742
ProShares Short High Yield
SJB
$51.9M
| $8K | ﹤0.01% |
460
-100
| -18% | -$1.92K |
|
7743
Virgin Galactic
SPCE
$315M
| $8K | ﹤0.01% |
122
| – | – |
|
7744
CALL
Simpson Manufacturing
SSD
$7.79B
| $8K | ﹤0.01% |
100
-7,100
| -99% | -$620K |
|
7745
Tradr 2X Long Innovation ETF
TARK
$11.9M
| $8K | ﹤0.01% |
394
-2,433
| -86% | -$70.9K |
|
|
TEF
7746
CALL
DELISTED
Telefonica
TEF
| $8K | ﹤0.01% |
2,300
+1,000
| +77% | +$3.5K |
|
7747
PUT
TriMas Corp
TRS
$1.41B
| $8K | ﹤0.01% |
+300
| New | +$8.01K |
|
|
TRVG
7748
PUT
trivago
TRVG
$385M
| $8K | ﹤0.01% |
1,220
-65,000
| -98% | -$399K |
|
7749
United Fire Group
UFCS
$1.35B
| $8K | ﹤0.01% |
319
+300
| +1,579% | +$8.76K |
|
7750
CALL
Vera Bradley
VRA
$98.7M
| $8K | ﹤0.01% |
1,900
-4,700
| -71% | -$17.2K |
|
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.