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 | |
|---|---|---|---|---|---|---|
501
CALL
Comcast
CMCSA
$84B
| $24.3M | 0.02% |
584,400
-1,726,000
| -75% | -$68.6M |
|
502
PUT
Okta
OKTA
$23.8B
| $24.3M | 0.02% |
350,100
-93,500
| -21% | -$7.1M |
|
503
PUT
Gilead Sciences
GILD
$162B
| $24.3M | 0.02% |
315,000
+95,800
| +44% | +$7.64M |
|
504
CALL
Emerson Electric
EMR
$78.2B
| $24.1M | 0.02% |
266,600
-96,500
| -27% | -$8.12M |
|
|
PXD
505
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $24.1M | 0.02% |
116,300
+50,600
| +77% | +$10.7M |
|
506
PUT
Builders FirstSource
BLDR
$7.64B
| $24.1M | 0.02% |
176,900
-95,100
| -35% | -$10.6M |
|
507
CALL
UBS Group
UBS
$173B
| $23.8M | 0.02% |
1,172,300
+788,900
| +206% | +$15.9M |
|
508
PUT
Las Vegas Sands
LVS
$30B
| $23.7M | 0.02% |
408,700
-604,400
| -60% | -$35.8M |
|
509
CALL
Enovix
ENVX
$1.02B
| $23.7M | 0.02% |
1,498,971
+738,285
| +97% | +$8.59M |
|
510
PUT
Charter Communications
CHTR
$15.9B
| $23.7M | 0.02% |
64,400
+11,100
| +21% | +$3.79M |
|
511
PUT
Agnico Eagle Mines
AEM
$73.5B
| $23.6M | 0.02% |
473,100
+221,900
| +88% | +$12M |
|
512
CALL
Newmont
NEM
$102B
| $23.6M | 0.02% |
553,900
-212,800
| -28% | -$9.66M |
|
513
CALL
Estee Lauder
EL
$29.9B
| $23.6M | 0.02% |
120,200
+18,100
| +18% | +$3.84M |
|
514
CALL
Corning
GLW
$133B
| $23.6M | 0.02% |
673,400
+244,500
| +57% | +$8.04M |
|
|
515
Newmont
NEM
$102B
| $23.6M | 0.02% |
552,906
+302,913
| +121% | +$13.7M |
|
516
PUT
Labcorp
LH
$23.1B
| $23.5M | 0.02% |
113,490
+104,294
| +1,134% | +$20.2M |
|
517
CALL
Take-Two Interactive
TTWO
$43.4B
| $23.4M | 0.02% |
159,300
-52,500
| -25% | -$6.86M |
|
518
CALL
Scorpio Tankers
STNG
$3.9B
| $23.4M | 0.02% |
495,000
+122,300
| +33% | +$6.05M |
|
|
NVO
519
CALL
Novo Nordisk
NVO
$213B
| $23.3M | 0.02% |
288,000
+100,600
| +54% | +$8.22M |
|
520
CALL
Generac Holdings
GNRC
$12.6B
| $23.2M | 0.02% |
155,400
-71,400
| -31% | -$8.14M |
|
521
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $23.1M | 0.02% |
201,900
+33,400
| +20% | +$4.31M |
|
522
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $23.1M | 0.02% |
+311,206
| New | +$23.4M |
|
523
CALL
HCA Healthcare
HCA
$82.5B
| $23M | 0.02% |
75,700
+19,700
| +35% | +$5.48M |
|
524
PUT
Philip Morris
PM
$303B
| $22.9M | 0.02% |
235,000
-249,900
| -52% | -$23.9M |
|
525
PUT
Danaher
DHR
$127B
| $22.9M | 0.02% |
107,611
-73,997
| -41% | -$15.7M |
|
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.