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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1351
PUT
Henry Schein
HSIC
$9.74B
| $7.05M | ﹤0.01% |
93,400
-15,700
| -14% | -$1.18M |
|
1352
CALL
Avis
CAR
$5.63B
| $7.02M | ﹤0.01% |
57,300
-47,100
| -45% | -$6.5M |
|
1353
PUT
AvalonBay Communities
AVB
$27.1B
| $7.01M | ﹤0.01% |
37,800
-6,800
| -15% | -$1.22M |
|
1354
CALL
Atmus Filtration Technologies
ATMU
$4.37B
| $7.01M | ﹤0.01% |
217,400
+206,000
| +1,807% | +$4.93M |
|
1355
PUT
Cintas
CTAS
$82.4B
| $7.01M | ﹤0.01% |
40,800
-134,000
| -77% | -$20.6M |
|
1356
CleanSpark
CLSK
$3.73B
| $6.98M | ﹤0.01% |
329,284
-5,930
| -2% | -$82.4K |
|
|
HCP
1357
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $6.92M | ﹤0.01% |
256,900
+107,400
| +72% | +$2.6M |
|
1358
CALL
InterDigital
IDCC
$6.68B
| $6.92M | ﹤0.01% |
65,000
+28,800
| +80% | +$3.04M |
|
1359
PUT
monday.com
MNDY
$3.27B
| $6.91M | ﹤0.01% |
30,600
+7,900
| +35% | +$1.68M |
|
1360
CALL
Vanguard FTSE Europe ETF
VGK
$30B
| $6.88M | ﹤0.01% |
117,200
+31,700
| +37% | +$2.05M |
|
1361
iShares MSCI India ETF
INDA
$6.71B
| $6.87M | ﹤0.01% |
+133,116
| New | +$6.71M |
|
1362
CALL
Qorvo
QRVO
$7.63B
| $6.87M | ﹤0.01% |
59,800
-6,800
| -10% | -$749K |
|
1363
CALL
Kohl's
KSS
$2.03B
| $6.85M | ﹤0.01% |
234,900
+66,500
| +39% | +$1.78M |
|
1364
ASML
ASML
$675B
| $6.83M | ﹤0.01% |
7,034
+1,278
| +22% | +$1.13M |
|
1365
PUT
Williams Companies
WMB
$90.5B
| $6.82M | ﹤0.01% |
174,900
-4,300
| -2% | -$153K |
|
|
GRMN
1366
PUT
Garmin
GRMN
$46.9B
| $6.8M | ﹤0.01% |
45,700
+11,300
| +33% | +$1.49M |
|
|
EVBG
1367
PUT
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $6.8M | ﹤0.01% |
195,200
+183,800
| +1,612% | +$5.18M |
|
1368
PUT
Nu Holdings
NU
$68.1B
| $6.79M | ﹤0.01% |
568,900
-285,600
| -33% | -$2.92M |
|
1369
PUT
Saia
SAIA
$11.3B
| $6.79M | ﹤0.01% |
11,600
+800
| +7% | +$419K |
|
1370
PUT
Albertsons Companies
ACI
$5.4B
| $6.78M | ﹤0.01% |
316,300
+237,600
| +302% | +$5.1M |
|
1371
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $6.78M | ﹤0.01% |
677,002
+64,388
| +11% | +$564K |
|
|
SAVE
1372
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $6.77M | ﹤0.01% |
1,398,300
+1,204,600
| +622% | +$8.91M |
|
|
BNY
1373
Bank of New York Mellon
BNY
$108B
| $6.74M | ﹤0.01% |
117,050
+5,464
| +5% | +$301K |
|
1374
CALL
Neurocrine Biosciences
NBIX
$17.7B
| $6.74M | ﹤0.01% |
48,900
+28,900
| +145% | +$3.95M |
|
1375
CALL
WillScot Mobile Mini Holdings
WSC
$4.8B
| $6.74M | ﹤0.01% |
144,900
+126,800
| +701% | +$5.89M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.