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 | |
|---|---|---|---|---|---|---|
1426
CALL
GE HealthCare
GEHC
$27.6B
| $4.28M | ﹤0.01% |
52,700
-97,100
| -65% | -$7.75M |
|
|
BRSL
1427
PUT
Brightstar Lottery PLC
BRSL
$1.91B
| $4.28M | ﹤0.01% |
134,100
+91,700
| +216% | +$2.55M |
|
1428
PUT
Crown Castle
CCI
$32.7B
| $4.27M | ﹤0.01% |
37,500
+6,600
| +21% | +$786K |
|
1429
PUT
Scorpio Tankers
STNG
$3.96B
| $4.27M | ﹤0.01% |
90,400
-177,600
| -66% | -$8.78M |
|
1430
PUT
Range Resources
RRC
$9.11B
| $4.25M | ﹤0.01% |
144,600
+81,800
| +130% | +$2.23M |
|
1431
PUT
PACCAR
PCAR
$69.6B
| $4.25M | ﹤0.01% |
50,800
+12,650
| +33% | +$936K |
|
1432
CALL
SL Green Realty
SLG
$3.88B
| $4.24M | ﹤0.01% |
141,100
+4,600
| +3% | +$111K |
|
1433
Canadian Solar
CSIQ
$906M
| $4.24M | ﹤0.01% |
109,549
+4,004
| +4% | +$155K |
|
1434
CALL
Carrier Global
CARR
$57.2B
| $4.24M | ﹤0.01% |
85,200
-59,300
| -41% | -$2.61M |
|
1435
PUT
iRhythm Holdings
IRTC
$3.59B
| $4.24M | ﹤0.01% |
40,600
+38,500
| +1,833% | +$4.62M |
|
|
ETRN
1436
CALL
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $4.22M | ﹤0.01% |
442,000
+375,300
| +563% | +$2.52M |
|
|
FLG
1437
CALL
Flagstar Bank National Association
FLG
$5.77B
| $4.2M | ﹤0.01% |
124,500
+28,700
| +30% | +$871K |
|
1438
CALL
Eos Energy Enterprises
EOSE
$1.23B
| $4.2M | ﹤0.01% |
966,800
+887,200
| +1,115% | +$2.33M |
|
1439
PUT
IonQ
IONQ
$12.3B
| $4.18M | ﹤0.01% |
309,000
+259,000
| +518% | +$2.15M |
|
1440
CALL
Albertsons Companies
ACI
$5.4B
| $4.17M | ﹤0.01% |
191,100
+118,300
| +163% | +$2.46M |
|
1441
PUT
Zimmer Biomet
ZBH
$17.7B
| $4.16M | ﹤0.01% |
28,600
+15,400
| +117% | +$2.09M |
|
1442
CALL
Acadia Healthcare
ACHC
$3.17B
| $4.16M | ﹤0.01% |
52,200
+51,600
| +8,600% | +$3.73M |
|
1443
CALL
Tilray
TLRY
$479M
| $4.15M | ﹤0.01% |
266,120
+96,520
| +57% | +$2.07M |
|
1444
CALL
Omnicom Group
OMC
$22.7B
| $4.15M | ﹤0.01% |
43,600
+26,500
| +155% | +$2.46M |
|
1445
PUT
Moody's
MCO
$82.4B
| $4.14M | ﹤0.01% |
11,900
-3,200
| -21% | -$1.01M |
|
1446
Sarepta Therapeutics
SRPT
$1.66B
| $4.1M | ﹤0.01% |
+35,835
| New | +$4.62M |
|
|
IPFF
1447
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $4.1M | ﹤0.01% |
95,700
-126,700
| -57% | -$5.43M |
|
1448
PUT
Interactive Brokers
IBKR
$40.9B
| $4.09M | ﹤0.01% |
197,200
-83,600
| -30% | -$1.65M |
|
1449
CALL
Cboe Global Markets
CBOE
$29.8B
| $4.08M | ﹤0.01% |
29,600
-1,800
| -6% | -$246K |
|
1450
CALL
Corsair Gaming
CRSR
$1.05B
| $4.08M | ﹤0.01% |
229,800
+31,900
| +16% | +$581K |
|
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.