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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SPLK
1351
DELISTED
Splunk Inc
SPLK
| $4.62M | ﹤0.01% |
+48,138
| New | +$4.61M |
|
1352
CALL
AngloGold Ashanti
AU
$40.3B
| $4.61M | ﹤0.01% |
190,700
-5,000
| -3% | -$101K |
|
1353
PUT
Emerson Electric
EMR
$82.6B
| $4.61M | ﹤0.01% |
52,900
+6,700
| +15% | +$586K |
|
1354
CALL
Polaris
PII
$4.11B
| $4.6M | ﹤0.01% |
41,600
+21,900
| +111% | +$2.43M |
|
1355
CALL
Nasdaq
NDAQ
$52.1B
| $4.59M | ﹤0.01% |
84,000
-20,600
| -20% | -$1.19M |
|
1356
CALL
Rocket Companies
RKT
$36.5B
| $4.58M | ﹤0.01% |
506,100
-290,300
| -36% | -$2.5M |
|
1357
CALL
Teva Pharmaceuticals
TEVA
$36B
| $4.56M | ﹤0.01% |
515,700
-141,100
| -21% | -$1.4M |
|
1358
CALL
Church & Dwight Co
CHD
$23.1B
| $4.56M | ﹤0.01% |
51,600
+3,700
| +8% | +$309K |
|
1359
CALL
AGNC Investment
AGNC
$12.4B
| $4.54M | ﹤0.01% |
450,200
-464,600
| -51% | -$5.05M |
|
|
1360
PUT
Polaris
PII
$4.11B
| $4.54M | ﹤0.01% |
41,000
+28,200
| +220% | +$3.12M |
|
1361
CALL
Tapestry
TPR
$28.4B
| $4.54M | ﹤0.01% |
105,200
-91,000
| -46% | -$3.91M |
|
1362
CALL
Conagra Brands
CAG
$7.03B
| $4.53M | ﹤0.01% |
120,700
+47,500
| +65% | +$1.76M |
|
1363
PUT
Lantheus
LNTH
$6.8B
| $4.53M | ﹤0.01% |
54,900
+13,000
| +31% | +$838K |
|
1364
PUT
Signet Jewelers
SIG
$3.49B
| $4.52M | ﹤0.01% |
58,100
+11,500
| +25% | +$853K |
|
1365
PUT
Axsome Therapeutics
AXSM
$12.3B
| $4.51M | ﹤0.01% |
73,100
-24,000
| -25% | -$1.58M |
|
1366
CALL
Ventas
VTR
$48.4B
| $4.5M | ﹤0.01% |
103,900
-8,000
| -7% | -$386K |
|
1367
PUT
Republic Services
RSG
$66.8B
| $4.5M | ﹤0.01% |
33,300
+28,200
| +553% | +$3.6M |
|
1368
PUT
Shift4
FOUR
$3.78B
| $4.49M | ﹤0.01% |
59,200
+53,600
| +957% | +$3.45M |
|
1369
Teck Resources
TECK
$29.7B
| $4.48M | ﹤0.01% |
+122,850
| New | +$4.88M |
|
1370
CALL
Sysco
SYY
$39.7B
| $4.48M | ﹤0.01% |
58,000
-43,700
| -43% | -$3.35M |
|
1371
CALL
Stellantis
STLA
$16.4B
| $4.47M | ﹤0.01% |
245,800
-333,900
| -58% | -$5.58M |
|
1372
CALL
Huntington Bancshares
HBAN
$34.8B
| $4.47M | ﹤0.01% |
398,800
+233,700
| +142% | +$3.25M |
|
1373
PUT
Gartner
IT
$9.33B
| $4.46M | ﹤0.01% |
13,700
-1,800
| -12% | -$595K |
|
1374
CALL
PPG Industries
PPG
$25.8B
| $4.46M | ﹤0.01% |
33,400
+18,500
| +124% | +$2.39M |
|
1375
CALL
Bank OZK
OZK
$5.52B
| $4.46M | ﹤0.01% |
130,300
+113,100
| +658% | +$4.75M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.