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 | |
|---|---|---|---|---|---|---|
1376
Eaton
ETN
$157B
| $4.54M | ﹤0.01% |
+22,593
| New | +$3.97M |
|
1377
PUT
AerCap
AER
$23.9B
| $4.54M | ﹤0.01% |
71,500
-27,800
| -28% | -$1.6M |
|
1378
Robinhood
HOOD
$85.2B
| $4.54M | ﹤0.01% |
455,019
+235,297
| +107% | +$2.19M |
|
1379
CALL
Penumbra
PEN
$12.5B
| $4.54M | ﹤0.01% |
13,200
-5,500
| -29% | -$1.69M |
|
1380
PUT
Centene
CNC
$31.3B
| $4.54M | ﹤0.01% |
67,300
-36,300
| -35% | -$2.42M |
|
1381
CALL
IonQ
IONQ
$12.3B
| $4.54M | ﹤0.01% |
335,400
+286,900
| +592% | +$2.39M |
|
|
LTHM
1382
CALL
DELISTED
Livent Corporation
LTHM
| $4.53M | ﹤0.01% |
165,100
+34,200
| +26% | +$820K |
|
1383
CALL
Cintas
CTAS
$82.4B
| $4.52M | ﹤0.01% |
36,400
-45,600
| -56% | -$5.35M |
|
1384
PUT
Idexx Laboratories
IDXX
$42.9B
| $4.52M | ﹤0.01% |
9,000
-10,300
| -53% | -$4.94M |
|
1385
Salesforce
CRM
$134B
| $4.52M | ﹤0.01% |
21,393
+21,293
| +21,293% | +$4.35M |
|
|
LOGC
1386
CALL
DELISTED
ContextLogic
LOGC
| $4.51M | ﹤0.01% |
685,800
+661,053
| +2,671% | +$5.24M |
|
|
1387
Starbucks
SBUX
$118B
| $4.51M | ﹤0.01% |
45,514
-258,463
| -85% | -$26.8M |
|
|
JWN
1388
CALL
DELISTED
Nordstrom
JWN
| $4.5M | ﹤0.01% |
220,100
-183,300
| -45% | -$3.08M |
|
1389
CALL
Avis
CAR
$5.63B
| $4.5M | ﹤0.01% |
19,700
-30,700
| -61% | -$5.63M |
|
1390
CALL
Brookfield
BN
$102B
| $4.5M | ﹤0.01% |
201,150
+19,500
| +11% | +$413K |
|
1391
PUT
InMode
INMD
$872M
| $4.49M | ﹤0.01% |
120,100
+11,800
| +11% | +$412K |
|
1392
CALL
Inspire Medical Systems
INSP
$1.42B
| $4.48M | ﹤0.01% |
13,800
+5,800
| +73% | +$1.66M |
|
1393
CALL
MP Materials
MP
$7.35B
| $4.47M | ﹤0.01% |
195,400
-3,000
| -2% | -$68.8K |
|
1394
Amgen
AMGN
$203B
| $4.47M | ﹤0.01% |
+20,129
| New | +$4.67M |
|
1395
PUT
XP
XP
$8.62B
| $4.47M | ﹤0.01% |
190,500
-305,200
| -62% | -$5.18M |
|
1396
PUT
Nasdaq
NDAQ
$52.1B
| $4.47M | ﹤0.01% |
89,600
-12,000
| -12% | -$650K |
|
1397
CALL
Cognex
CGNX
$10.3B
| $4.46M | ﹤0.01% |
79,700
+62,300
| +358% | +$3.22M |
|
1398
Danaher
DHR
$135B
| $4.46M | ﹤0.01% |
+20,973
| New | +$4.44M |
|
|
SMAR
1399
CALL
DELISTED
Smartsheet Inc.
SMAR
| $4.46M | ﹤0.01% |
116,500
+75,100
| +181% | +$3.25M |
|
|
COOP
1400
PUT
DELISTED
Mr. Cooper
COOP
| $4.46M | ﹤0.01% |
88,000
-12,300
| -12% | -$564K |
|
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.