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 | Miscellaneous | 98.34% |
| 2 | Technology | 0.38% |
| 3 | Healthcare | 0.28% |
| 4 | Consumer Discretionary | 0.25% |
| 5 | Industrials | 0.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
501
PUT
Applovin
APP
$107B
| $30.3M | 0.02% |
438,000
+35,100
| +9% | +$1.86M |
|
502
PUT
Marriott International
MAR
$87.8B
| $30.3M | 0.02% |
120,100
-160,700
| -57% | -$38.9M |
|
503
CALL
Wheaton Precious Metals
WPM
$70.4B
| $30.3M | 0.02% |
642,500
+64,400
| +11% | +$2.91M |
|
504
CALL
Coupang
CPNG
$27.5B
| $30.3M | 0.02% |
1,700,400
+1,041,600
| +158% | +$17M |
|
505
CALL
Williams Companies
WMB
$90.7B
| $30.1M | 0.02% |
773,500
+164,500
| +27% | +$5.84M |
|
506
CALL
Medtronic
MDT
$120B
| $30.1M | 0.02% |
345,700
-268,300
| -44% | -$22.9M |
|
507
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$417M
| $30M | 0.02% |
185,550
-114,890
| -38% | -$23.8M |
|
508
PUT
Zoom
ZM
$29.6B
| $29.8M | 0.02% |
456,600
-69,800
| -13% | -$4.65M |
|
509
PUT
Unity
U
$18.3B
| $29.8M | 0.02% |
1,114,600
-197,800
| -15% | -$6.22M |
|
510
PUT
Workday
WDAY
$47.2B
| $29.8M | 0.02% |
125,700
-4,800
| -4% | -$1.37M |
|
511
PUT
Fortinet
FTNT
$115B
| $29.7M | 0.02% |
435,400
+78,400
| +22% | +$5.22M |
|
512
PUT
Twilio
TWLO
$35.8B
| $29.6M | 0.02% |
483,500
-152,200
| -24% | -$10M |
|
513
CALL
Advance Auto Parts
AAP
$2.67B
| $29.5M | 0.02% |
347,100
-216,500
| -38% | -$14.9M |
|
|
514
CALL
Unity
U
$18.3B
| $29.4M | 0.02% |
1,101,100
-1,469,600
| -57% | -$46.2M |
|
515
ProShares Bitcoin Strategy ETF
BITO
$1.71B
| $29.3M | 0.02% |
906,491
+309,754
| +52% | +$7.8M |
|
516
CALL
Cytokinetics
CYTK
$10.1B
| $29.2M | 0.02% |
417,000
-313,600
| -43% | -$24.3M |
|
517
PUT
Regeneron Pharmaceuticals
REGN
$85.2B
| $29.2M | 0.02% |
30,300
-43,800
| -59% | -$41.6M |
|
518
CALL
Skyworks Solutions
SWKS
$11.1B
| $29.1M | 0.02% |
268,800
+9,700
| +4% | +$1.02M |
|
519
CALL
eBay
EBAY
$46B
| $29.1M | 0.02% |
551,300
-139,700
| -20% | -$6.35M |
|
520
CALL
United States Oil Fund
USO
$1.61B
| $29M | 0.02% |
368,300
-33,300
| -8% | -$2.4M |
|
521
PUT
Okta
OKTA
$29.8B
| $29M | 0.02% |
276,900
-1,600
| -0.6% | -$148K |
|
522
CALL
Nice
NICE
$6.18B
| $28.9M | 0.02% |
110,800
+42,600
| +62% | +$9.67M |
|
523
CALL
Nu Holdings
NU
$74.2B
| $28.9M | 0.02% |
2,419,300
+157,000
| +7% | +$1.6M |
|
524
PUT
Hilton Worldwide
HLT
$70B
| $28.8M | 0.02% |
135,200
-500
| -0.4% | -$98.3K |
|
525
CALL
Johnson Controls International
JCI
$87.8B
| $28.8M | 0.02% |
440,400
+48,200
| +12% | +$2.81M |
|
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, 3,674 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 Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Healthcare.
- 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.