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 | |
|---|---|---|---|---|---|---|
2976
Brookfield
BN
$103B
| $749K | ﹤0.01% |
+35,933
| New | +$809K |
|
|
WE
2977
PUT
DELISTED
WeWork Inc.
WE
| $749K | ﹤0.01% |
248,900
+248,110
| +31,406% | +$1.7M |
|
|
TWO
2978
PUT
Two Harbors Investment
TWO
$1.27B
| $746K | ﹤0.01% |
56,400
+24,400
| +76% | +$327K |
|
2979
CALL
TriNet
TNET
$2.97B
| $745K | ﹤0.01% |
6,400
+5,400
| +540% | +$570K |
|
2980
PUT
Ambev
ABEV
$47.3B
| $743K | ﹤0.01% |
288,200
+74,700
| +35% | +$216K |
|
2981
CALL
BlackLine
BL
$1.81B
| $743K | ﹤0.01% |
13,400
-16,000
| -54% | -$876K |
|
2982
Amplify Energy
AMPY
$158M
| $742K | ﹤0.01% |
101,020
+6,188
| +7% | +$42.8K |
|
2983
PUT
AngloGold Ashanti
AU
$40.6B
| $742K | ﹤0.01% |
47,000
-102,300
| -69% | -$1.93M |
|
2984
CALL
Clearfield
CLFD
$422M
| $742K | ﹤0.01% |
25,900
+2,500
| +11% | +$98.1K |
|
2985
Cracker Barrel
CBRL
$1.17B
| $741K | ﹤0.01% |
+11,032
| New | +$926K |
|
2986
CALL
McCormick & Company Non-Voting
MKC
$13.7B
| $741K | ﹤0.01% |
9,800
-10,800
| -52% | -$902K |
|
2987
PUT
Host Hotels & Resorts
HST
$17B
| $739K | ﹤0.01% |
46,000
+16,300
| +55% | +$272K |
|
2988
CALL
Onto Innovation
ONTO
$12.7B
| $739K | ﹤0.01% |
5,800
+5,700
| +5,700% | +$678K |
|
2989
PUT
Teucrium Agricultural Fund
TAGS
$19.2M
| $739K | ﹤0.01% |
55,400
-7,800
| -12% | -$243K |
|
2990
CALL
Anavex Life Sciences
AVXL
$234M
| $738K | ﹤0.01% |
112,700
-38,400
| -25% | -$306K |
|
2991
CALL
InterDigital
IDCC
$6.66B
| $738K | ﹤0.01% |
9,200
-1,200
| -12% | -$104K |
|
2992
CALL
US Foods
USFD
$21.9B
| $738K | ﹤0.01% |
18,600
-31,300
| -63% | -$1.3M |
|
2993
PUT
HealthEquity
HQY
$8.33B
| $737K | ﹤0.01% |
10,100
+5,400
| +115% | +$365K |
|
2994
PUT
LendingTree
TREE
$559M
| $736K | ﹤0.01% |
47,500
+35,500
| +296% | +$719K |
|
2995
CALL
FingerMotion
FNGR
$16.4M
| $735K | ﹤0.01% |
118,400
-30,600
| -21% | -$162K |
|
2996
Franco-Nevada
FNV
$41.2B
| $735K | ﹤0.01% |
5,513
-20,822
| -79% | -$2.94M |
|
2997
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$269M
| $735K | ﹤0.01% |
14,900
-500
| -3% | -$27.3K |
|
2998
Kornit Digital
KRNT
$706M
| $735K | ﹤0.01% |
38,898
+8,183
| +27% | +$202K |
|
2999
CALL
HDFC Bank
HDB
$119B
| $731K | ﹤0.01% |
24,800
-1,400
| -5% | -$45.6K |
|
3000
CALL
Lumen
LUMN
$6.34B
| $731K | ﹤0.01% |
515,300
-548,400
| -52% | -$928K |
|
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.