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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2526
CALL
Oscar Health
OSCR
$8.5B
| $1.77M | ﹤0.01% |
119,400
+100,600
| +535% | +$1.38M |
|
|
GOEV
2527
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $1.77M | ﹤0.01% |
24,845
+24,585
| +9,456% | +$1.71M |
|
2528
CALL
Absci
ABSI
$1.28B
| $1.77M | ﹤0.01% |
311,600
+291,600
| +1,458% | +$1.31M |
|
2529
PUT
Ferguson
FERG
$44.7B
| $1.77M | ﹤0.01% |
8,100
+4,600
| +131% | +$917K |
|
2530
CALL
Credit Acceptance
CACC
$6B
| $1.76M | ﹤0.01% |
3,200
-700
| -18% | -$384K |
|
2531
CALL
Western Midstream Partners
WES
$19.6B
| $1.76M | ﹤0.01% |
49,600
+26,100
| +111% | +$810K |
|
2532
PUT
Vivid Seats
SEAT
$77M
| $1.76M | ﹤0.01% |
14,700
+14,615
| +17,194% | +$1.71M |
|
2533
CALL
Teledyne Technologies
TDY
$30.4B
| $1.76M | ﹤0.01% |
4,100
-7,900
| -66% | -$3.39M |
|
2534
United Therapeutics
UTHR
$26.3B
| $1.76M | ﹤0.01% |
7,660
+6,218
| +431% | +$1.4M |
|
2535
CALL
Aramark
ARMK
$15B
| $1.76M | ﹤0.01% |
57,500
-67,500
| -54% | -$2.03M |
|
2536
Peabody Energy
BTU
$2.78B
| $1.76M | ﹤0.01% |
+72,398
| New | +$1.82M |
|
2537
CALL
ArcBest
ARCB
$3.44B
| $1.75M | ﹤0.01% |
12,300
-19,000
| -61% | -$2.49M |
|
2538
CALL
Olin
OLN
$2.64B
| $1.75M | ﹤0.01% |
29,800
-155,300
| -84% | -$8.33M |
|
2539
CALL
Red Rock Resorts
RRR
$3.74B
| $1.75M | ﹤0.01% |
29,300
-9,300
| -24% | -$516K |
|
|
HPP
2540
Hudson Pacific Properties
HPP
$834M
| $1.75M | ﹤0.01% |
38,778
+20,004
| +107% | +$1.05M |
|
2541
Roblox
RBLX
$34B
| $1.75M | ﹤0.01% |
+45,846
| New | +$1.86M |
|
|
NKLA
2542
PUT
DELISTED
Nikola Corporation Common Stock
NKLA
| $1.75M | ﹤0.01% |
56,107
+12,980
| +30% | +$279K |
|
2543
CALL
DXC Technology
DXC
$1.63B
| $1.75M | ﹤0.01% |
82,500
+72,600
| +733% | +$1.58M |
|
2544
CALL
Grab
GRAB
$13.5B
| $1.75M | ﹤0.01% |
557,300
-275,500
| -33% | -$883K |
|
|
EH
2545
EHang Holdings
EH
$372M
| $1.75M | ﹤0.01% |
85,007
+22,894
| +37% | +$296K |
|
2546
PUT
Upwork
UPWK
$1.09B
| $1.75M | ﹤0.01% |
142,500
+123,700
| +658% | +$1.68M |
|
2547
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $1.75M | ﹤0.01% |
61,600
-206,800
| -77% | -$5.77M |
|
2548
CALL
Huntington Bancshares
HBAN
$35.1B
| $1.75M | ﹤0.01% |
125,100
+15,900
| +15% | +$206K |
|
2549
CALL
Freshworks
FRSH
$2.84B
| $1.74M | ﹤0.01% |
95,500
+72,400
| +313% | +$1.5M |
|
2550
iShares S&P 500 Growth ETF
IVW
$72.5B
| $1.74M | ﹤0.01% |
+20,592
| New | +$1.65M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.