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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
BNKK
7526
PUT
Bonk Inc
BNKK
$8.4M
| $6K | ﹤0.01% |
271
+242
| +834% | +$8.34K |
|
7527
CALL
Smart Sand
SND
$181M
| $6K | ﹤0.01% |
3,000
-15,300
| -84% | -$34.1K |
|
7528
PUT
Sportsman's Warehouse
SPWH
$44.1M
| $6K | ﹤0.01% |
+2,400
| New | +$6.01K |
|
7529
PUT
Stratasys
SSYS
$691M
| $6K | ﹤0.01% |
700
-1,100
| -61% | -$9.47K |
|
7530
SurgePays
SURG
$6.03M
| $6K | ﹤0.01% |
3,924
-4,084
| -51% | -$7.2K |
|
7531
PUT
Triple Flag Precious Metals
TFPM
$5.92B
| $6K | ﹤0.01% |
+400
| New | +$6.62K |
|
7532
PUT
Taylor Morrison
TMHC
| $6K | ﹤0.01% |
100
-300
| -75% | -$20.5K |
|
7533
PUT
Towne Bank
TOWN
$3.51B
| $6K | ﹤0.01% |
+200
| New | +$6.96K |
|
7534
CALL
Tempest Therapeutics
TPST
$14.1M
| $6K | ﹤0.01% |
638
+576
| +929% | +$7.43K |
|
|
TSVT
7535
CALL
DELISTED
2seventy bio
TSVT
| $6K | ﹤0.01% |
2,200
-14,400
| -87% | -$59.1K |
|
|
UBX
7536
CALL
DELISTED
Unity Biotechnology
UBX
| $6K | ﹤0.01% |
6,900
+300
| +5% | +$373 |
|
7537
PUT
UNIFI
UFI
$120M
| $6K | ﹤0.01% |
1,000
-5,000
| -83% | -$30.6K |
|
7538
CALL
Procure Space ETF
UFO
$610M
| $6K | ﹤0.01% |
300
-200
| -40% | -$4.25K |
|
7539
iShares MSCI World ETF
URTH
$7.94B
| $6K | ﹤0.01% |
+45
| New | +$7.12K |
|
7540
CALL
US Gold Corp
USAU
$209M
| $6K | ﹤0.01% |
1,100
-6,200
| -85% | -$41.1K |
|
7541
United States Lime & Minerals
USLM
$3.33B
| $6K | ﹤0.01% |
+50
| New | +$6.34K |
|
|
VERV
7542
PUT
DELISTED
Verve Therapeutics
VERV
| $6K | ﹤0.01% |
1,100
-32,600
| -97% | -$184K |
|
7543
CALL
Telefônica Brasil
VIV
$21.2B
| $6K | ﹤0.01% |
800
+300
| +60% | +$2.67K |
|
7544
PUT
Vera Bradley
VRA
$104M
| $6K | ﹤0.01% |
1,700
-181,200
| -99% | -$904K |
|
7545
PUT
Vestis
VSTS
$2.04B
| $6K | ﹤0.01% |
400
-228,600
| -100% | -$3.44M |
|
7546
CALL
W&T Offshore
WTI
$478M
| $6K | ﹤0.01% |
3,800
+2,600
| +217% | +$5.2K |
|
7547
CALL
Ibotta
IBTA
$639M
| $6K | ﹤0.01% |
+100
| New | +$6.94K |
|
|
CNR
7548
PUT
Core Natural Resources Inc
CNR
$4.03B
| $6K | ﹤0.01% |
86,300
-29,800
| -26% | -$3.43M |
|
|
RPT
7549
Rithm Property Trust
RPT
$95.8M
| $6K | ﹤0.01% |
+343
| New | +$6.32K |
|
|
ENFY
7550
DELISTED
Enlightify Inc
ENFY
| $6K | ﹤0.01% |
6,212
+6,109
| +5,931% | +$10.6K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.