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 | |
|---|---|---|---|---|---|---|
576
CALL
Microchip Technology
MCHP
$46.2B
| $20.1M | 0.02% |
224,700
+101,000
| +82% | +$7.97M |
|
577
CALL
SolarEdge
SEDG
$2.91B
| $20.1M | 0.02% |
74,800
-5,000
| -6% | -$1.43M |
|
578
CALL
Ferrari
RACE
$65.4B
| $20M | 0.02% |
61,600
+6,700
| +12% | +$1.95M |
|
579
CALL
Illumina
ILMN
$28.9B
| $20M | 0.02% |
109,585
-41,223
| -27% | -$8.34M |
|
580
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $19.9M | 0.02% |
651,450
-209,900
| -24% | -$5.31M |
|
581
PUT
Automatic Data Processing
ADP
$97.2B
| $19.8M | 0.02% |
90,100
+600
| +0.7% | +$129K |
|
582
ProShares UltraPro QQQ
TQQQ
$34.1B
| $19.7M | 0.02% |
+962,180
| New | +$15.4M |
|
583
CALL
Zoetis
ZTS
$31.1B
| $19.7M | 0.02% |
114,400
+51,000
| +80% | +$8.82M |
|
584
CALL
Prudential Financial
PRU
$41.3B
| $19.6M | 0.02% |
222,700
-24,200
| -10% | -$2.02M |
|
585
PUT
Cencora
COR
$58.5B
| $19.6M | 0.02% |
101,900
+16,200
| +19% | +$2.8M |
|
586
CALL
BioNTech
BNTX
$23.2B
| $19.6M | 0.02% |
181,200
+165,600
| +1,062% | +$18.6M |
|
587
CALL
TransDigm Group
TDG
$66.8B
| $19.4M | 0.02% |
21,700
+14,600
| +206% | +$11.5M |
|
588
PUT
Carvana
CVNA
$44.9B
| $19.4M | 0.02% |
3,737,500
+53,000
| +1% | +$147K |
|
589
PUT
Tyson Foods
TSN
$20.1B
| $19.3M | 0.02% |
377,500
-96,700
| -20% | -$5.26M |
|
590
Pfizer
PFE
$141B
| $19.3M | 0.02% |
525,221
+467,052
| +803% | +$18.2M |
|
591
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $19.2M | 0.02% |
54,600
+23,700
| +77% | +$7.99M |
|
|
FISV
592
CALL
Fiserv Inc
FISV
$26.8B
| $19.2M | 0.02% |
152,300
-7,400
| -5% | -$871K |
|
593
CALL
SBA Communications
SBAC
$18.9B
| $19.2M | 0.02% |
82,900
+75,700
| +1,051% | +$18.1M |
|
594
CALL
Progressive
PGR
$119B
| $19.2M | 0.02% |
145,000
+96,000
| +196% | +$12.9M |
|
595
PUT
HP
HPQ
$23B
| $19.2M | 0.02% |
624,300
+166,200
| +36% | +$4.99M |
|
596
PUT
Hershey
HSY
$35B
| $19M | 0.02% |
76,200
-42,800
| -36% | -$11.2M |
|
597
CALL
Southern Company
SO
$108B
| $19M | 0.02% |
270,400
-31,900
| -11% | -$2.29M |
|
|
FISV
598
PUT
Fiserv Inc
FISV
$26.8B
| $18.9M | 0.02% |
150,200
+23,000
| +18% | +$2.71M |
|
|
TYNS
599
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $18.9M | 0.02% |
297,700
+211,100
| +244% | +$13.4M |
|
600
PUT
Emerson Electric
EMR
$78.2B
| $18.9M | 0.02% |
209,300
+156,400
| +296% | +$13.2M |
|
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.