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 | |
|---|---|---|---|---|---|---|
3951
CALL
PubMatic
PUBM
$605M
| $296K | ﹤0.01% |
24,500
+16,800
| +218% | +$256K |
|
3952
CALL
uniQure
QURE
$2.52B
| $296K | ﹤0.01% |
44,200
-40,800
| -48% | -$367K |
|
3953
PUT
Vontier
VNT
$4.62B
| $296K | ﹤0.01% |
9,600
+8,800
| +1,100% | +$271K |
|
3954
PUT
Icon
ICLR
$13.9B
| $295K | ﹤0.01% |
1,200
+800
| +200% | +$202K |
|
3955
PUT
Vital Farms
VITL
$592M
| $295K | ﹤0.01% |
25,500
+25,100
| +6,275% | +$289K |
|
3956
PUT
AerCap
AER
$24.3B
| $294K | ﹤0.01% |
4,700
-66,800
| -93% | -$4.21M |
|
3957
BrightView Holdings
BV
$1.3B
| $294K | ﹤0.01% |
37,951
+35,177
| +1,268% | +$281K |
|
3958
PUT
Funko
FNKO
$355M
| $294K | ﹤0.01% |
38,500
+19,500
| +103% | +$145K |
|
3959
CALL
Leggett & Platt
LEG
$1.47B
| $294K | ﹤0.01% |
11,600
-14,500
| -56% | -$408K |
|
3960
CALL
National Bank Holdings
NBHC
$1.9B
| $294K | ﹤0.01% |
+9,900
| New | +$317K |
|
3961
PUT
Bain Capital Specialty
BCSF
$833M
| $293K | ﹤0.01% |
19,200
-5,300
| -22% | -$80.2K |
|
3962
CALL
Canadian Imperial Bank of Commerce
CM
$109B
| $293K | ﹤0.01% |
7,600
-7,100
| -48% | -$293K |
|
3963
PUT
Dolby
DLB
$4.97B
| $293K | ﹤0.01% |
3,700
-91,200
| -96% | -$7.65M |
|
3964
PUT
Erie Indemnity
ERIE
$12.7B
| $293K | ﹤0.01% |
1,000
+900
| +900% | +$233K |
|
|
HIVE
3965
CALL
HIVE Digital Technologies
HIVE
$760M
| $293K | ﹤0.01% |
95,200
-146,800
| -61% | -$625K |
|
|
DENN
3966
PUT
DELISTED
Denny's
DENN
| $292K | ﹤0.01% |
34,500
+33,400
| +3,036% | +$338K |
|
3967
CALL
Virtu Financial
VIRT
$5.11B
| $291K | ﹤0.01% |
16,900
+1,400
| +9% | +$25.4K |
|
3968
PUT
Aemetis
AMTX
$104M
| $290K | ﹤0.01% |
70,000
+30,700
| +78% | +$188K |
|
3969
Cipher Digital
CIFR
$8.35B
| $290K | ﹤0.01% |
124,669
+40,350
| +48% | +$136K |
|
|
CUK
3970
PUT
DELISTED
Carnival PLC
CUK
| $290K | ﹤0.01% |
23,700
+8,200
| +53% | +$123K |
|
3971
CALL
Oceaneering
OII
$4.78B
| $290K | ﹤0.01% |
11,300
-26,000
| -70% | -$594K |
|
3972
PUT
UWM Holdings
UWMC
$631M
| $290K | ﹤0.01% |
59,900
-26,100
| -30% | -$150K |
|
|
BERY
3973
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $290K | ﹤0.01% |
5,118
-6,861
| -57% | -$403K |
|
3974
PUT
AerSale
ASLE
$307M
| $289K | ﹤0.01% |
19,400
+12,800
| +194% | +$185K |
|
3975
CALL
Vita Coco
COCO
$3.97B
| $289K | ﹤0.01% |
11,100
+10,500
| +1,750% | +$280K |
|
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.