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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
576
CALL
Newmont
NEM
$102B
| $20.9M | 0.02% |
564,800
+10,900
| +2% | +$443K |
|
577
CALL
The Mosaic Company
MOS
$7.24B
| $20.7M | 0.02% |
590,600
-185,300
| -24% | -$7.11M |
|
578
CALL
Mondelez International
MDLZ
$78.1B
| $20.6M | 0.02% |
297,500
+109,800
| +58% | +$7.91M |
|
579
CALL
Agnico Eagle Mines
AEM
$73.5B
| $20.6M | 0.02% |
452,700
-203,200
| -31% | -$9.96M |
|
580
PUT
United States Oil Fund
USO
$2.36B
| $20.5M | 0.02% |
253,700
-2,800
| -1% | -$206K |
|
581
PUT
Eaton
ETN
$158B
| $20.5M | 0.02% |
96,000
+19,500
| +25% | +$4.2M |
|
582
CALL
Vertiv
VRT
$116B
| $20.4M | 0.02% |
549,600
+165,900
| +43% | +$5.47M |
|
583
PUT
CarMax
KMX
$8.15B
| $20.4M | 0.02% |
288,100
+73,200
| +34% | +$5.99M |
|
584
CALL
Kinder Morgan
KMI
$72.3B
| $20.3M | 0.02% |
1,256,500
+283,900
| +29% | +$4.89M |
|
585
PUT
EQT Corp
EQT
$33.8B
| $20.2M | 0.02% |
498,900
-422,600
| -46% | -$17.5M |
|
586
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $20.2M | 0.02% |
216,900
+51,500
| +31% | +$4.84M |
|
587
PUT
MetLife
MET
$60B
| $20.2M | 0.02% |
320,500
-126,700
| -28% | -$7.89M |
|
588
CALL
Chewy
CHWY
$8.81B
| $20.1M | 0.02% |
1,100,400
+333,400
| +43% | +$9.53M |
|
589
CALL
Becton Dickinson
BDX
$42.2B
| $20M | 0.02% |
77,500
+22,900
| +42% | +$6.19M |
|
590
PUT
Dow Inc
DOW
$22.5B
| $20M | 0.02% |
388,000
+53,300
| +16% | +$2.86M |
|
591
PUT
T. Rowe Price
TROW
$24.9B
| $19.9M | 0.02% |
189,800
+105,500
| +125% | +$11.9M |
|
592
CALL
Peabody Energy
BTU
$2.91B
| $19.8M | 0.02% |
762,400
-36,900
| -5% | -$825K |
|
593
CALL
Lyft
LYFT
$5.57B
| $19.8M | 0.02% |
1,877,600
-67,300
| -3% | -$750K |
|
|
APLS
594
CALL
DELISTED
Apellis Pharmaceuticals
APLS
| $19.8M | 0.02% |
519,200
+345,000
| +198% | +$15.2M |
|
595
PUT
TransDigm Group
TDG
$66.8B
| $19.7M | 0.02% |
23,400
+14,400
| +160% | +$12.6M |
|
596
CALL
GameStop
GME
$9.69B
| $19.6M | 0.02% |
1,193,100
+83,000
| +7% | +$1.65M |
|
597
CALL
eBay
EBAY
$49.3B
| $19.6M | 0.02% |
444,200
-48,300
| -10% | -$2.15M |
|
598
CALL
Johnson Controls International
JCI
$86.9B
| $19.5M | 0.02% |
366,500
+108,900
| +42% | +$6.72M |
|
599
CALL
Teck Resources
TECK
$28B
| $19.4M | 0.02% |
451,200
-327,600
| -42% | -$13.6M |
|
600
CALL
S&P Global
SPGI
$127B
| $19.4M | 0.02% |
53,000
+19,000
| +56% | +$7.47M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.