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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CVAC
5376
DELISTED
CureVac
CVAC
| $76K | ﹤0.01% |
11,192
-7,426
| -40% | -$65.6K |
|
5377
CALL
GATX Corp
GATX
$6.29B
| $76K | ﹤0.01% |
700
+300
| +75% | +$36.2K |
|
5378
PUT
St. Joe Company
JOE
$3.51B
| $76K | ﹤0.01% |
+1,400
| New | +$80.9K |
|
5379
CALL
Microvast
MVST
$273M
| $76K | ﹤0.01% |
40,300
+24,800
| +160% | +$53.1K |
|
5380
PUT
SLM Corp
SLM
$4.91B
| $76K | ﹤0.01% |
5,600
+4,600
| +460% | +$69.2K |
|
5381
PUT
World Acceptance Corp
WRLD
$840M
| $76K | ﹤0.01% |
600
| – | – |
|
5382
PUT
Xometry
XMTR
$4.73B
| $76K | ﹤0.01% |
4,500
+4,300
| +2,150% | +$81.4K |
|
5383
PUT
ZipRecruiter
ZIP
$316M
| $76K | ﹤0.01% |
6,400
+6,200
| +3,100% | +$101K |
|
5384
Arena Group
AREN
$57.1M
| $75K | ﹤0.01% |
17,745
+14,651
| +474% | +$60.2K |
|
5385
CALL
VanEck Energy Income ETF
EINC
$78.3M
| $75K | ﹤0.01% |
6,100
-400
| -6% | -$26.1K |
|
|
HEES
5386
DELISTED
H&E Equipment Services
HEES
| $75K | ﹤0.01% |
1,738
-428
| -20% | -$19.5K |
|
5387
Knife River
KNF
$4.2B
| $75K | ﹤0.01% |
+1,556
| New | +$73.9K |
|
5388
CALL
Northeast Community Bancorp
NECB
$366M
| $75K | ﹤0.01% |
5,100
-10,400
| -67% | -$163K |
|
5389
Newegg Commerce
NEGG
$276M
| $75K | ﹤0.01% |
4,450
+165
| +4% | +$3.83K |
|
5390
PUT
Intellia Therapeutics
NTLA
$1.5B
| $75K | ﹤0.01% |
2,400
-62,500
| -96% | -$2.42M |
|
|
ORC
5391
Orchid Island Capital
ORC
$1.29B
| $75K | ﹤0.01% |
+8,814
| New | +$86.5K |
|
|
ORGN
5392
DELISTED
Origin Materials
ORGN
| $75K | ﹤0.01% |
1,965
-2,842
| -59% | -$223K |
|
5393
CALL
Otter Tail
OTTR
$3.74B
| $75K | ﹤0.01% |
1,000
+600
| +150% | +$49.3K |
|
5394
CALL
Sabra Healthcare REIT
SBRA
$5.36B
| $75K | ﹤0.01% |
5,400
-20,300
| -79% | -$260K |
|
|
UROY
5395
Uranium Royalty Corp
UROY
$1.3B
| $75K | ﹤0.01% |
26,331
+13,291
| +102% | +$31.3K |
|
|
TPC
5396
CALL
Tutor Perini Cor
TPC
$4.44B
| $75K | ﹤0.01% |
9,700
+7,500
| +341% | +$61.6K |
|
|
VLD
5397
CALL
DELISTED
Velo3D, Inc.
VLD
| $75K | ﹤0.01% |
1,389
+626
| +82% | +$38.9K |
|
|
CMLS
5398
CALL
DELISTED
Cumulus Media Inc. Class A Common Stock
CMLS
| $75K | ﹤0.01% |
14,800
+8,300
| +128% | +$39.4K |
|
|
AGEN
5399
CALL
Agenus
AGEN
$306M
| $74K | ﹤0.01% |
11,240
+700
| +7% | +$19.8K |
|
5400
CALL
Archrock
AROC
$6.29B
| $74K | ﹤0.01% |
5,900
-35,500
| -86% | -$425K |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.