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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1326
CALL
Dropbox
DBX
$6.81B
| $6.38M | ﹤0.01% |
250,700
-128,500
| -34% | -$3.02M |
|
1327
CALL
Nextpower Inc
NXT
$15.2B
| $6.38M | ﹤0.01% |
170,100
-75,500
| -31% | -$3.15M |
|
|
GTM
1328
PUT
ZoomInfo Technologies
GTM
$861M
| $6.37M | ﹤0.01% |
617,400
-558,900
| -48% | -$5.85M |
|
1329
PUT
Public Service Enterprise Group
PEG
$39.8B
| $6.36M | ﹤0.01% |
71,300
-44,900
| -39% | -$3.58M |
|
1330
CALL
Novavax
NVAX
$1.23B
| $6.36M | ﹤0.01% |
503,400
-67,300
| -12% | -$869K |
|
1331
PUT
Bunge Global
BG
$23.6B
| $6.35M | ﹤0.01% |
65,700
-16,300
| -20% | -$1.67M |
|
1332
CALL
Icahn Enterprises
IEP
$5.17B
| $6.31M | ﹤0.01% |
467,000
+275,200
| +143% | +$4.16M |
|
1333
CALL
Monster Beverage
MNST
$91.4B
| $6.31M | ﹤0.01% |
120,900
-121,600
| -50% | -$6.02M |
|
1334
CALL
Ball Corp
BALL
$17B
| $6.3M | ﹤0.01% |
92,800
+8,800
| +10% | +$559K |
|
|
HUT
1335
CALL
Hut 8
HUT
$12.4B
| $6.28M | ﹤0.01% |
512,600
-352,900
| -41% | -$4.69M |
|
1336
CALL
Winnebago Industries
WGO
$870M
| $6.28M | ﹤0.01% |
108,000
+63,100
| +141% | +$3.61M |
|
1337
PUT
Maplebear
CART
$9.92B
| $6.25M | ﹤0.01% |
153,400
-13,600
| -8% | -$477K |
|
1338
Cogent Communications
CCOI
$594M
| $6.24M | ﹤0.01% |
82,185
+31,391
| +62% | +$2.16M |
|
1339
CALL
Intuitive Machines
LUNR
$2.07B
| $6.23M | ﹤0.01% |
773,900
+656,700
| +560% | +$3.27M |
|
1340
PUT
Molina Healthcare
MOH
$10.3B
| $6.2M | ﹤0.01% |
18,000
+500
| +3% | +$165K |
|
1341
CALL
United States Natural Gas Fund
UNG
$470M
| $6.2M | ﹤0.01% |
379,500
+69,400
| +22% | +$1.01M |
|
1342
Stellantis
STLA
$16.5B
| $6.18M | ﹤0.01% |
440,145
+377,770
| +606% | +$6.42M |
|
1343
CALL
Magnite
MGNI
$2.65B
| $6.17M | ﹤0.01% |
445,300
+238,900
| +116% | +$3.26M |
|
1344
PUT
Allegro MicroSystems
ALGM
$8.58B
| $6.17M | ﹤0.01% |
264,600
+233,900
| +762% | +$5.88M |
|
1345
PUT
Consolidated Edison
ED
$41.6B
| $6.16M | ﹤0.01% |
59,200
+40,600
| +218% | +$4.02M |
|
1346
CALL
Elastic
ESTC
$6.1B
| $6.14M | ﹤0.01% |
80,000
-26,800
| -25% | -$2.64M |
|
1347
CALL
Vail Resorts
MTN
$5.19B
| $6.13M | ﹤0.01% |
35,200
+2,600
| +8% | +$465K |
|
1348
CALL
Air Products & Chemicals
APD
$66.3B
| $6.13M | ﹤0.01% |
20,600
-19,900
| -49% | -$5.44M |
|
1349
CALL
BridgeBio Pharma
BBIO
$16.5B
| $6.13M | ﹤0.01% |
240,900
-1,500
| -0.6% | -$39.4K |
|
1350
CALL
2x Long VIX Futures ETF
UVIX
$286M
| $6.13M | ﹤0.01% |
2,175
+473
| +28% | +$533K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.