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 | |
|---|---|---|---|---|---|---|
4851
PUT
HealthEquity
HQY
$8.41B
| $167K | ﹤0.01% |
2,500
+1,600
| +178% | +$101K |
|
|
NGD
4852
CALL
DELISTED
New Gold Inc
NGD
| $167K | ﹤0.01% |
190,400
-39,100
| -17% | -$30.9K |
|
4853
PagSeguro Digital
PAGS
$2.69B
| $167K | ﹤0.01% |
12,681
-943
| -7% | -$12.6K |
|
|
ASTR
4854
CALL
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $167K | ﹤0.01% |
18,327
+2,674
| +17% | +$45.1K |
|
|
NMTR
4855
CALL
DELISTED
9 Meters Biopharma
NMTR
| $167K | ﹤0.01% |
38,905
-550
| -1% | -$2.73K |
|
|
Y
4856
DELISTED
Alleghany Corp
Y
| $167K | ﹤0.01% |
200
-1,956
| -91% | -$1.64M |
|
4857
PUT
Curtiss-Wright
CW
$26.7B
| $166K | ﹤0.01% |
+1,200
| New | +$170K |
|
4858
PUT
Designer Brands
DBI
$307M
| $166K | ﹤0.01% |
10,900
-3,100
| -22% | -$48.6K |
|
4859
PUT
FirstService
FSV
$6.48B
| $166K | ﹤0.01% |
1,400
+1,100
| +367% | +$141K |
|
|
LGHL
4860
CALL
Lion Group Holding
LGHL
$853K
| $166K | ﹤0.01% |
+1
| New | +$418K |
|
4861
PUT
Onto Innovation
ONTO
$12.9B
| $166K | ﹤0.01% |
2,600
+1,900
| +271% | +$140K |
|
4862
CALL
Splash Beverage Group
SBEV
$2.33M
| $166K | ﹤0.01% |
758
-128
| -14% | -$48.6K |
|
4863
PUT
SEI Investments
SEIC
$12.4B
| $166K | ﹤0.01% |
3,400
-200
| -6% | -$10.9K |
|
4864
Veeco
VECO
$3.05B
| $166K | ﹤0.01% |
+9,100
| New | +$186K |
|
4865
PUT
AST SpaceMobile
ASTS
$17.6B
| $165K | ﹤0.01% |
22,900
+800
| +4% | +$7.04K |
|
4866
iShares Russell 2000 Growth ETF
IWO
$14.3B
| $165K | ﹤0.01% |
800
| – | – |
|
4867
CALL
Xylem
XYL
$27.3B
| $165K | ﹤0.01% |
1,900
-100
| -5% | -$9.09K |
|
|
SLCA
4868
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $165K | ﹤0.01% |
15,139
+5,028
| +50% | +$64K |
|
|
RXDX
4869
PUT
DELISTED
Prometheus Biosciences, Inc. Common Stock
RXDX
| $165K | ﹤0.01% |
+2,800
| New | +$128K |
|
|
ML
4870
CALL
DELISTED
MoneyLion Inc.
ML
| $165K | ﹤0.01% |
6,180
-47
| -0.8% | -$2.15K |
|
4871
PUT
AMC Global Media
AMCX
$492M
| $164K | ﹤0.01% |
8,100
+6,500
| +406% | +$179K |
|
4872
Atomera
ATOM
$200M
| $164K | ﹤0.01% |
16,212
-4,508
| -22% | -$53.3K |
|
4873
CALL
Conduent
CNDT
$244M
| $164K | ﹤0.01% |
49,200
+24,200
| +97% | +$101K |
|
4874
PUT
G-III Apparel Group
GIII
$1.54B
| $164K | ﹤0.01% |
11,000
-500
| -4% | -$10.2K |
|
4875
Navigator Holdings
NVGS
$1.38B
| $164K | ﹤0.01% |
+14,356
| New | +$163K |
|
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.