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 |
Apple
AAPL
|
+$286M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$82.3M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$72.6M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$64.2M |
| 5 |
Intel
INTC
|
+$52.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$51.5M |
| 2 |
iShares Silver Trust
SLV
|
+$41.8M |
| 3 |
Ford
F
|
+$26.3M |
| 4 |
United Airlines
UAL
|
+$22.7M |
| 5 |
ExxonMobil
XOM
|
+$22.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.84% |
| 2 | Communication Services | 0.32% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.28% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5801
Bain Capital Specialty
BCSF
$806M
| $83K | ﹤0.01% |
+6,147
| New | +$91.9K |
|
5802
CALL
Gladstone Investment Corp
GAIN
$643M
| $83K | ﹤0.01% |
5,900
-18,800
| -76% | -$283K |
|
5803
CALL
Janus International
JBI
$700M
| $83K | ﹤0.01% |
9,300
+800
| +9% | +$7.76K |
|
5804
MillerKnoll
MLKN
$1.53B
| $83K | ﹤0.01% |
3,183
+2,161
| +211% | +$65.5K |
|
5805
CALL
Precigen
PGEN
$2.24B
| $83K | ﹤0.01% |
62,200
-20,400
| -25% | -$30.3K |
|
5806
PUT
Saic
SAIC
$4.95B
| $83K | ﹤0.01% |
900
+300
| +50% | +$26.2K |
|
5807
CALL
SGHC Ltd
SGHC
$7.11B
| $83K | ﹤0.01% |
20,300
-64,800
| -76% | -$499K |
|
5808
CALL
Steven Madden
SHOO
$3.37B
| $83K | ﹤0.01% |
2,600
-6,500
| -71% | -$246K |
|
5809
SkyWater Technology
SKYT
$1.6B
| $83K | ﹤0.01% |
13,832
-525
| -4% | -$3.6K |
|
|
SWTX
5810
CALL
DELISTED
SpringWorks Therapeutics
SWTX
| $83K | ﹤0.01% |
3,400
-50,500
| -94% | -$1.85M |
|
|
LSXMA
5811
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $83K | ﹤0.01% |
3,151
-21,230
| -87% | -$636K |
|
|
WBT
5812
CALL
DELISTED
Welbilt, Inc.
WBT
| $83K | ﹤0.01% |
3,500
| – | – |
|
5813
Xtrackers Harvest CSI 500 China A-Shares Small Cap ETF
ASHS
$32.7M
| $82K | ﹤0.01% |
2,327
+201
| +9% | +$6.57K |
|
|
CIO
5814
CALL
DELISTED
City Office REIT
CIO
| $82K | ﹤0.01% |
+6,400
| New | +$90.5K |
|
5815
Hilltop Holdings
HTH
$2.26B
| $82K | ﹤0.01% |
+3,091
| New | +$88.1K |
|
5816
CALL
Immunocore
IMCR
$1.72B
| $82K | ﹤0.01% |
2,200
+2,100
| +2,100% | +$68.2K |
|
|
LX
5817
CALL
LexinFintech Holdings
LX
$241M
| $82K | ﹤0.01% |
37,200
+23,800
| +178% | +$55.1K |
|
5818
PUT
Maravai LifeSciences
MRVI
$969M
| $82K | ﹤0.01% |
2,900
-3,100
| -52% | -$98.2K |
|
5819
CALL
McEwen Inc
MUX
$1.03B
| $82K | ﹤0.01% |
18,710
+2,750
| +17% | +$17.1K |
|
5820
CALL
Noodles & Co
NDLS
$111M
| $82K | ﹤0.01% |
2,188
-1,750
| -44% | -$77.7K |
|
5821
NGL Energy Partners
NGL
$2.05B
| $82K | ﹤0.01% |
54,603
-18,184
| -25% | -$35.7K |
|
5822
CALL
Nu Skin
NUS
$252M
| $82K | ﹤0.01% |
1,900
+1,300
| +217% | +$59.7K |
|
5823
PUT
OFS Capital
OFS
$45M
| $82K | ﹤0.01% |
8,300
+6,100
| +277% | +$73.8K |
|
5824
CALL
Reinsurance Group of America
RGA
$15.5B
| $82K | ﹤0.01% |
700
-500
| -42% | -$58K |
|
5825
CALL
Semtech
SMTC
$11B
| $82K | ﹤0.01% |
1,500
-3,000
| -67% | -$181K |
|
Similar funds
Simplex Trading's Q2 2022 Portfolio in Review
As of Q2 2022, Simplex Trading held 11,810 positions worth $94.1B, down 14% from $109B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $11.3B of net new capital in Q2 2022, opening 1,405 new positions and adding to 4,027 existing holdings. Its largest new stake was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
By sector, the portfolio is most concentrated in Technology at 0.84% of assets, up from 0.67% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was United Airlines, an estimated $22.7M trimmed.
- Simplex Trading's largest Q2 2022 buy was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
- Simplex Trading added most to Apple in Q2 2022, an estimated $286M increase.
- Simplex Trading's biggest Q2 2022 reduction was United Airlines, cutting an estimated $22.7M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2022, selling an estimated $51.5M.
- Simplex Trading's ten largest holdings make up 40% of its $94.1B portfolio in Q2 2022.
- Simplex Trading opened 1,405 new positions and closed 1,792 in Q2 2022.
- Simplex Trading's portfolio value fell 14% quarter-over-quarter to $94.1B.
Based on Simplex Trading's 13F filing for Q2 2022, filed 3 Aug 2022.