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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3351
PUT
FerroAtlántica
GSM
$617M
| $483K | ﹤0.01% |
101,300
+48,300
| +91% | +$222K |
|
|
PDS
3352
CALL
Precision Drilling
PDS
$1.04B
| $482K | ﹤0.01% |
9,900
-5,500
| -36% | -$263K |
|
3353
Compañía de Minas Buenaventura
BVN
$8.06B
| $481K | ﹤0.01% |
65,555
+62,337
| +1,937% | +$459K |
|
3354
Photronics
PLAB
$1.76B
| $481K | ﹤0.01% |
+18,664
| New | +$346K |
|
3355
PUT
UWM Holdings
UWMC
$624M
| $481K | ﹤0.01% |
86,000
+52,000
| +153% | +$280K |
|
|
ITCI
3356
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $481K | ﹤0.01% |
7,600
-49,400
| -87% | -$3.08M |
|
|
GMDA
3357
CALL
DELISTED
Gamida Cell Ltd. Ordinary Shares
GMDA
| $481K | ﹤0.01% |
249,700
+39,900
| +19% | +$68.7K |
|
|
CHS
3358
CALL
DELISTED
Chicos FAS, Inc.
CHS
| $480K | ﹤0.01% |
89,900
+20,900
| +30% | +$109K |
|
|
ESTE
3359
PUT
DELISTED
Earthstone Energy Inc. Class A Common Stock
ESTE
| $480K | ﹤0.01% |
33,600
+17,400
| +107% | +$232K |
|
3360
Noodles & Co
NDLS
$85M
| $479K | ﹤0.01% |
17,719
+4,686
| +36% | +$153K |
|
|
TEN
3361
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $479K | ﹤0.01% |
26,924
+3,951
| +17% | +$69.3K |
|
3362
Ascendis Pharma A/S
ASND
$16.6B
| $478K | ﹤0.01% |
+5,364
| New | +$467K |
|
3363
Procept Biorobotics
PRCT
$1.01B
| $478K | ﹤0.01% |
13,532
+12,128
| +864% | +$401K |
|
3364
CALL
Red Rock Resorts
RRR
$3.8B
| $477K | ﹤0.01% |
10,200
-6,600
| -39% | -$307K |
|
3365
AGCO
AGCO
$8.71B
| $474K | ﹤0.01% |
3,613
-3,229
| -47% | -$400K |
|
3366
CALL
Innovative Industrial Properties
IIPR
$1.78B
| $474K | ﹤0.01% |
6,500
-12,200
| -65% | -$859K |
|
3367
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.2B
| $473K | ﹤0.01% |
16,466
+6,754
| +70% | +$179K |
|
3368
iShares Core S&P Small-Cap ETF
IJR
$110B
| $473K | ﹤0.01% |
4,755
+2,653
| +126% | +$253K |
|
3369
CALL
SouthState Bank Corp
SSB
$10.2B
| $473K | ﹤0.01% |
7,200
+1,500
| +26% | +$100K |
|
|
VRN
3370
PUT
DELISTED
Veren
VRN
| $473K | ﹤0.01% |
70,400
-32,700
| -32% | -$228K |
|
3371
CALL
CleanSpark
CLSK
$3.6B
| $472K | ﹤0.01% |
110,100
+40,300
| +58% | +$162K |
|
3372
CALL
Cavco Industries
CVCO
$4.46B
| $472K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$431K |
|
|
ODP
3373
PUT
DELISTED
ODP
ODP
| $472K | ﹤0.01% |
10,100
+100
| +1% | +$4.29K |
|
3374
PUT
Boyd Gaming
BYD
$6.64B
| $471K | ﹤0.01% |
6,800
-2,200
| -24% | -$148K |
|
|
CRON
3375
CALL
Cronos Group
CRON
$1.07B
| $471K | ﹤0.01% |
239,300
-157,400
| -40% | -$288K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.