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 | |
|---|---|---|---|---|---|---|
776
CALL
Aflac
AFL
$62.9B
| $15.4M | 0.01% |
148,800
-62,900
| -30% | -$6.86M |
|
|
IPFF
777
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $15.4M | 0.01% |
324,400
+34,300
| +12% | +$1.62M |
|
778
CALL
argenx
ARGX
$56.7B
| $15.3M | 0.01% |
24,900
+16,900
| +211% | +$9.9M |
|
|
MPT
779
CALL
Medical Properties Trust
MPT
$2.88B
| $15.3M | 0.01% |
3,874,100
+1,919,800
| +98% | +$8.6M |
|
780
PUT
NRG Energy
NRG
$29.2B
| $15.3M | 0.01% |
169,400
-39,500
| -19% | -$3.66M |
|
781
PUT
Colgate-Palmolive
CL
$71.9B
| $15.3M | 0.01% |
168,000
-2,700
| -2% | -$258K |
|
782
UnitedHealth
UNH
$382B
| $15.2M | 0.01% |
+30,088
| New | +$17.1M |
|
783
CALL
Constellation Brands
STZ
$22.1B
| $15.2M | 0.01% |
68,800
+20,700
| +43% | +$4.92M |
|
784
Hershey
HSY
$34.7B
| $15.2M | 0.01% |
89,718
+82,792
| +1,195% | +$14.8M |
|
|
OKLO
785
CALL
Oklo
OKLO
$7.49B
| $15.2M | 0.01% |
714,900
+390,800
| +121% | +$7.57M |
|
786
CALL
APA Corp
APA
$13.1B
| $15.1M | 0.01% |
655,800
-55,600
| -8% | -$1.3M |
|
|
BNY
787
PUT
Bank of New York Mellon
BNY
$108B
| $15.1M | 0.01% |
196,600
+8,300
| +4% | +$642K |
|
788
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.82B
| $15.1M | 0.01% |
47,500
-35,400
| -43% | -$12.8M |
|
|
789
PUT
Aflac
AFL
$62.9B
| $15.1M | 0.01% |
145,700
+16,400
| +13% | +$1.79M |
|
790
PUT
McKesson
MCK
$95.7B
| $15M | 0.01% |
26,400
-6,200
| -19% | -$3.47M |
|
791
CALL
Abercrombie & Fitch
ANF
$4.1B
| $15M | 0.01% |
100,300
-25,500
| -20% | -$3.73M |
|
792
Super Micro Computer
SMCI
$20.3B
| $15M | 0.01% |
+491,603
| New | +$17.9M |
|
793
Berkshire Hathaway Class B
BRK.B
$1.06T
| $15M | 0.01% |
+33,016
| New | +$15.2M |
|
794
PUT
Dow Inc
DOW
$22.5B
| $14.9M | 0.01% |
666,400
+419,700
| +170% | +$19.6M |
|
795
CALL
Restaurant Brands International
QSR
$25B
| $14.9M | 0.01% |
228,300
-74,300
| -25% | -$5.15M |
|
796
PUT
ProShares Ether Strategy ETF
EETH
$55.2M
| $14.8M | 0.01% |
442,500
+12,400
| +3% | +$762K |
|
|
TLN
797
PUT
Talen Energy Corp
TLN
$17.9B
| $14.8M | 0.01% |
73,600
+40,200
| +120% | +$7.84M |
|
798
PUT
Bloom Energy
BE
$62.5B
| $14.8M | 0.01% |
666,100
+314,200
| +89% | +$5.51M |
|
799
CALL
Digital Realty Trust
DLR
$66.6B
| $14.8M | 0.01% |
83,400
+19,300
| +30% | +$3.42M |
|
800
CALL
Archer Aviation
ACHR
$3.94B
| $14.8M | 0.01% |
1,513,600
+299,500
| +25% | +$1.66M |
|
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.