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 | |
|---|---|---|---|---|---|---|
2726
CALL
B&G Foods
BGS
$285M
| $940K | ﹤0.01% |
95,100
+15,300
| +19% | +$190K |
|
2727
CALL
ESAB
ESAB
$5.25B
| $940K | ﹤0.01% |
13,400
| – | – |
|
2728
iHeartMedia
IHRT
$535M
| $940K | ﹤0.01% |
297,688
+13,036
| +5% | +$49.2K |
|
2729
Samsara
IOT
$19.3B
| $940K | ﹤0.01% |
37,321
-43,428
| -54% | -$1.15M |
|
2730
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $940K | ﹤0.01% |
15,700
+14,900
| +1,863% | +$981K |
|
2731
CALL
Littelfuse
LFUS
$10.2B
| $939K | ﹤0.01% |
3,800
+3,700
| +3,700% | +$1M |
|
2732
PUT
Exelixis
EXEL
$13.9B
| $937K | ﹤0.01% |
42,900
+28,100
| +190% | +$588K |
|
2733
CALL
Euronet Worldwide
EEFT
$3.02B
| $936K | ﹤0.01% |
11,800
+11,400
| +2,850% | +$1.06M |
|
2734
WD-40
WDFC
$3.1B
| $935K | ﹤0.01% |
4,604
+3,630
| +373% | +$776K |
|
2735
PUT
AGCO
AGCO
$8.78B
| $934K | ﹤0.01% |
7,900
+2,200
| +39% | +$279K |
|
|
NEWR
2736
DELISTED
New Relic, Inc.
NEWR
| $934K | ﹤0.01% |
+10,917
| New | +$880K |
|
2737
CALL
Helmerich & Payne
HP
$3.53B
| $931K | ﹤0.01% |
22,100
+2,500
| +13% | +$104K |
|
2738
Liberty Global Class A
LBTYA
$3.31B
| $931K | ﹤0.01% |
54,418
+34,015
| +167% | +$614K |
|
2739
PUT
Tenable Holdings
TENB
$3.56B
| $931K | ﹤0.01% |
20,800
+19,100
| +1,124% | +$858K |
|
2740
CALL
American Coastal Insurance
ACIC
$498M
| $928K | ﹤0.01% |
126,200
+8,800
| +7% | +$57K |
|
2741
Innovative Industrial Properties
IIPR
$1.78B
| $927K | ﹤0.01% |
+12,261
| New | +$980K |
|
2742
CALL
Par Pacific Holdings
PARR
$3.88B
| $927K | ﹤0.01% |
25,800
-38,900
| -60% | -$1.28M |
|
|
FTCH
2743
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $927K | ﹤0.01% |
443,990
-514,281
| -54% | -$2.1M |
|
2744
PUT
Quest Diagnostics
DGX
$25.1B
| $926K | ﹤0.01% |
7,600
+3,300
| +77% | +$440K |
|
2745
CALL
Mid-America Apartment Communities
MAA
$15.6B
| $926K | ﹤0.01% |
7,200
+6,900
| +2,300% | +$997K |
|
|
ASRT
2746
CALL
DELISTED
Assertio
ASRT
| $925K | ﹤0.01% |
24,113
+9,326
| +63% | +$545K |
|
2747
CALL
United States Brent Oil Fund
BNO
$815M
| $923K | ﹤0.01% |
28,800
+6,200
| +27% | +$182K |
|
|
MFA
2748
CALL
MFA Financial
MFA
$929M
| $921K | ﹤0.01% |
95,900
-11,100
| -10% | -$120K |
|
2749
Rush Street Interactive
RSI
$3.24B
| $921K | ﹤0.01% |
199,458
+77,483
| +64% | +$327K |
|
2750
Global X NASDAQ-100 Covered Call ETF
QYLD
$7.97B
| $920K | ﹤0.01% |
54,867
+53,067
| +2,948% | +$931K |
|
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.