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 | |
|---|---|---|---|---|---|---|
2451
CALL
Silicon Motion
SIMO
$9.19B
| $1.17M | ﹤0.01% |
17,800
-68,800
| -79% | -$4.52M |
|
2452
PUT
Valley National Bancorp
VLY
$7.93B
| $1.17M | ﹤0.01% |
126,100
+120,700
| +2,235% | +$1.33M |
|
2453
PUT
MarineMax
HZO
$800M
| $1.16M | ﹤0.01% |
40,500
+10,000
| +33% | +$314K |
|
2454
CALL
RBC Bearings
RBC
$18.8B
| $1.16M | ﹤0.01% |
5,000
+4,300
| +614% | +$990K |
|
|
ONC
2455
PUT
BeOne Medicines Ltd
ONC
$33.8B
| $1.16M | ﹤0.01% |
5,400
+1,800
| +50% | +$432K |
|
2456
PUT
Molson Coors Class B
TAP
$7.68B
| $1.16M | ﹤0.01% |
22,500
-27,300
| -55% | -$1.41M |
|
2457
ProShares UltraShort Yen
YCS
$34.5M
| $1.16M | ﹤0.01% |
41,438
+11,122
| +37% | +$307K |
|
2458
CALL
Rogers Communications
RCI
$17.7B
| $1.16M | ﹤0.01% |
25,000
+15,900
| +175% | +$754K |
|
2459
Vanguard Value ETF
VTV
$189B
| $1.16M | ﹤0.01% |
8,392
+7,332
| +692% | +$1.03M |
|
2460
CALL
WEX
WEX
$6.11B
| $1.16M | ﹤0.01% |
6,300
+2,800
| +80% | +$510K |
|
|
VRAY
2461
DELISTED
ViewRay, Inc.
VRAY
| $1.16M | ﹤0.01% |
334,637
-238,377
| -42% | -$1.01M |
|
|
GOOS
2462
PUT
Canada Goose Holdings
GOOS
$868M
| $1.16M | ﹤0.01% |
60,000
-77,100
| -56% | -$1.52M |
|
2463
CALL
RB Global
RBA
$20.8B
| $1.15M | ﹤0.01% |
20,500
+18,400
| +876% | +$1.08M |
|
2464
CALL
nCino
NCNO
$1.81B
| $1.15M | ﹤0.01% |
46,400
-44,700
| -49% | -$1.18M |
|
2465
CALL
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $1.15M | ﹤0.01% |
25,400
+17,900
| +239% | +$797K |
|
2466
CALL
Delek US
DK
$3.87B
| $1.15M | ﹤0.01% |
49,900
+18,400
| +58% | +$461K |
|
2467
PUT
3D Systems Corp
DDD
$420M
| $1.14M | ﹤0.01% |
106,800
+82,500
| +340% | +$841K |
|
2468
PUT
Eagle Materials
EXP
$6.6B
| $1.14M | ﹤0.01% |
+7,800
| New | +$1.11M |
|
2469
CALL
AES
AES
$10.6B
| $1.14M | ﹤0.01% |
47,500
-138,700
| -74% | -$3.53M |
|
2470
CALL
Celanese
CE
$5.09B
| $1.14M | ﹤0.01% |
10,500
+400
| +4% | +$46.2K |
|
2471
PUT
American Water Works
AWK
$26.3B
| $1.14M | ﹤0.01% |
7,800
-2,200
| -22% | -$326K |
|
2472
PUT
Stem
STEM
$49.2M
| $1.14M | ﹤0.01% |
10,065
+9,555
| +1,874% | +$1.62M |
|
|
PRVB
2473
DELISTED
Provention Bio, Inc. Common Stock
PRVB
| $1.14M | ﹤0.01% |
47,345
-2,035
| -4% | -$25.5K |
|
2474
PUT
Ball Corp
BALL
$17B
| $1.14M | ﹤0.01% |
20,700
-23,500
| -53% | -$1.31M |
|
2475
CALL
Vir Biotechnology
VIR
$1.47B
| $1.14M | ﹤0.01% |
49,000
+40,900
| +505% | +$1.05M |
|
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.