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 | |
|---|---|---|---|---|---|---|
1526
CALL
Vail Resorts
MTN
$5.19B
| $3.82M | ﹤0.01% |
17,200
+7,800
| +83% | +$1.85M |
|
1527
ZIM Integrated Shipping Services
ZIM
$3B
| $3.82M | ﹤0.01% |
365,198
+39,862
| +12% | +$507K |
|
1528
The Mosaic Company
MOS
$7.09B
| $3.81M | ﹤0.01% |
106,910
-24,054
| -18% | -$923K |
|
1529
PUT
Herbalife
HLF
$1.23B
| $3.8M | ﹤0.01% |
271,700
+263,900
| +3,383% | +$3.99M |
|
1530
PUT
Raymond James Financial
RJF
$32.5B
| $3.79M | ﹤0.01% |
37,700
-67,000
| -64% | -$7.09M |
|
1531
CALL
QuidelOrtho
QDEL
$1.09B
| $3.78M | ﹤0.01% |
51,800
+6,000
| +13% | +$479K |
|
1532
CALL
CRISPR Therapeutics
CRSP
$4.58B
| $3.78M | ﹤0.01% |
83,200
-68,400
| -45% | -$3.53M |
|
1533
PUT
Annaly Capital Management
NLY
$16.9B
| $3.77M | ﹤0.01% |
200,500
+2,500
| +1% | +$49.7K |
|
1534
CALL
Omega Healthcare
OHI
$15.4B
| $3.77M | ﹤0.01% |
113,700
-49,400
| -30% | -$1.58M |
|
1535
PUT
Pan American Silver
PAAS
$18.6B
| $3.76M | ﹤0.01% |
266,900
-1,100
| -0.4% | -$17.2K |
|
1536
CALL
Galicia Financial Group
GGAL
$7.92B
| $3.76M | ﹤0.01% |
288,300
-30,300
| -10% | -$494K |
|
|
CFLT
1537
PUT
DELISTED
Confluent
CFLT
| $3.75M | ﹤0.01% |
126,800
+42,500
| +50% | +$1.42M |
|
1538
CALL
Coty
COTY
$2.33B
| $3.75M | ﹤0.01% |
342,200
+24,900
| +8% | +$293K |
|
1539
CALL
Boise Cascade
BCC
$2.74B
| $3.75M | ﹤0.01% |
36,400
+27,700
| +318% | +$2.85M |
|
|
BNY
1540
CALL
Bank of New York Mellon
BNY
$108B
| $3.74M | ﹤0.01% |
87,600
-83,900
| -49% | -$3.74M |
|
1541
PUT
Jabil
JBL
$32.8B
| $3.73M | ﹤0.01% |
29,400
-33,400
| -53% | -$3.65M |
|
1542
CALL
Louisiana-Pacific
LPX
$5.2B
| $3.73M | ﹤0.01% |
67,500
+37,600
| +126% | +$2.47M |
|
|
CHX
1543
PUT
DELISTED
ChampionX
CHX
| $3.73M | ﹤0.01% |
104,700
+66,400
| +173% | +$2.36M |
|
1544
CALL
Bank OZK
OZK
$5.49B
| $3.73M | ﹤0.01% |
100,600
-44,300
| -31% | -$1.79M |
|
1545
CALL
Kinsale Capital Group
KNSL
$8.05B
| $3.73M | ﹤0.01% |
9,000
+8,100
| +900% | +$3.14M |
|
|
BLD
1546
CALL
DELISTED
TopBuild
BLD
| $3.72M | ﹤0.01% |
14,800
+900
| +6% | +$248K |
|
|
ANSS
1547
CALL
DELISTED
Ansys
ANSS
| $3.72M | ﹤0.01% |
12,500
-7,000
| -36% | -$2.22M |
|
1548
PUT
Kinross Gold
KGC
$28.5B
| $3.68M | ﹤0.01% |
808,100
-36,900
| -4% | -$181K |
|
|
HCP
1549
PUT
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $3.68M | ﹤0.01% |
161,400
-82,800
| -34% | -$2.25M |
|
1550
CALL
Gran Tierra Energy
GTE
$260M
| $3.68M | ﹤0.01% |
529,900
-3,000
| -0.6% | -$19.2K |
|
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.