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 | |
|---|---|---|---|---|---|---|
5951
Pliant Therapeutics
PLRX
$65M
| $72K | ﹤0.01% |
3,461
-8,823
| -72% | -$169K |
|
5952
Pinnacle Financial Partners Inc
PNFP
$16.5B
| $72K | ﹤0.01% |
+900
| New | +$71.9K |
|
5953
PUT
Patterson-UTI
PTEN
$3.83B
| $72K | ﹤0.01% |
6,200
+3,300
| +114% | +$47.2K |
|
5954
PUT
FreightCar America
RAIL
$280M
| $72K | ﹤0.01% |
19,400
-9,200
| -32% | -$38.4K |
|
5955
CALL
LiveRamp
RAMP
$2.3B
| $72K | ﹤0.01% |
4,000
-900
| -18% | -$20.8K |
|
5956
CALL
Red Robin
RRGB
$149M
| $72K | ﹤0.01% |
10,700
+7,100
| +197% | +$57.9K |
|
5957
Southwest Gas
SWX
$6.44B
| $72K | ﹤0.01% |
1,045
-348
| -25% | -$28.2K |
|
|
TPH
5958
PUT
DELISTED
Tri Pointe Homes
TPH
| $72K | ﹤0.01% |
4,800
+600
| +14% | +$10.6K |
|
5959
PUT
Tenaris
TS
$29.3B
| $72K | ﹤0.01% |
2,800
+700
| +33% | +$18.5K |
|
5960
CALL
X4 Pharmaceuticals
XFOR
$405M
| $72K | ﹤0.01% |
1,407
-366
| -21% | -$12.6K |
|
|
AVX
5961
PUT
Avax One Technology Ltd
AVX
$23.9M
| – | – |
0
| – | – |
|
5962
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$155B
| $71K | ﹤0.01% |
16,100
+5,400
| +50% | +$24.5K |
|
5963
PUT
Brookfield Renewable
BEPC
$6.23B
| $71K | ﹤0.01% |
2,200
-79,600
| -97% | -$3.06M |
|
5964
Blue Bird Corp
BLBD
$2.46B
| $71K | ﹤0.01% |
8,535
+4,503
| +112% | +$47K |
|
5965
PUT
B2Gold
BTG
$5.18B
| $71K | ﹤0.01% |
22,300
-34,700
| -61% | -$114K |
|
5966
PUT
Cincinnati Financial
CINF
$27.5B
| $71K | ﹤0.01% |
800
-5,000
| -86% | -$515K |
|
|
CISO
5967
PUT
CISO Global
CISO
$11.7M
| $71K | ﹤0.01% |
1,607
+1,474
| +1,108% | +$68.9K |
|
5968
Cellebrite
CLBT
$3.94B
| $71K | ﹤0.01% |
18,363
+8,319
| +83% | +$41.7K |
|
5969
ProShares Trust Short MSCI EAFE
EFZ
$10.1M
| $71K | ﹤0.01% |
1,517
+1,466
| +2,875% | +$62.6K |
|
5970
PUT
Vaalco Energy
EGY
$551M
| $71K | ﹤0.01% |
16,500
+3,600
| +28% | +$18.5K |
|
5971
PUT
Humacyte
HUMA
$192M
| $71K | ﹤0.01% |
21,900
+1,600
| +8% | +$6.14K |
|
5972
CALL
OppFi
OPFI
$838M
| $71K | ﹤0.01% |
31,200
-167,600
| -84% | -$478K |
|
5973
PUT
OptimizeRx
OPRX
$129M
| $71K | ﹤0.01% |
4,800
+4,200
| +700% | +$83K |
|
5974
CALL
Open Text
OTEX
$6.41B
| $71K | ﹤0.01% |
2,700
-69,100
| -96% | -$2.44M |
|
5975
CALL
Perdoceo Education
PRDO
$2.06B
| $71K | ﹤0.01% |
6,900
+1,100
| +19% | +$13.1K |
|
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.