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 | |
|---|---|---|---|---|---|---|
3676
CALL
Encompass Health
EHC
$11.5B
| $594K | ﹤0.01% |
7,200
-200
| -3% | -$14.6K |
|
3677
PUT
Novanta
NOVT
$5.04B
| $594K | ﹤0.01% |
3,400
+3,300
| +3,300% | +$541K |
|
3678
CALL
Akebia Therapeutics
AKBA
$341M
| $593K | ﹤0.01% |
324,300
+167,500
| +107% | +$268K |
|
|
SAFE
3679
PUT
Safehold
SAFE
$1.19B
| $593K | ﹤0.01% |
28,800
-5,900
| -17% | -$123K |
|
3680
PUT
US Foods
USFD
$22.3B
| $593K | ﹤0.01% |
11,000
-85,100
| -89% | -$4.19M |
|
3681
PUT
Valmont Industries
VMI
$9.33B
| $593K | ﹤0.01% |
2,600
+2,200
| +550% | +$492K |
|
|
MACK
3682
CALL
DELISTED
Merrimack Pharmaceuticals, Inc.
MACK
| $593K | ﹤0.01% |
40,200
-5,700
| -12% | -$80.1K |
|
3683
CALL
Jack Henry & Associates
JKHY
$11.2B
| $590K | ﹤0.01% |
3,400
-1,700
| -33% | -$289K |
|
|
KEEL
3684
PUT
Keel Infrastructure Corp
KEEL
$2.25B
| $588K | ﹤0.01% |
263,800
+25,200
| +11% | +$65.5K |
|
3685
Tarsus Pharmaceuticals
TARS
$2.57B
| $587K | ﹤0.01% |
16,166
+8,248
| +104% | +$243K |
|
3686
Direxion Daily CSI China Internet Index Bull 2X ETF
CWEB
$233M
| $586K | ﹤0.01% |
+19,605
| New | +$554K |
|
3687
Warrior Met Coal
HCC
$4.17B
| $586K | ﹤0.01% |
9,663
+7,113
| +279% | +$431K |
|
|
HIMX
3688
Himax Technologies
HIMX
$2.09B
| $586K | ﹤0.01% |
109,708
+46,392
| +73% | +$265K |
|
3689
PUT
M/I Homes
MHO
$3.89B
| $586K | ﹤0.01% |
4,300
+600
| +16% | +$76.2K |
|
3690
PUT
Terex
TEX
$7.84B
| $586K | ﹤0.01% |
9,100
+4,700
| +107% | +$276K |
|
3691
CALL
Ternium
TX
$9.68B
| $586K | ﹤0.01% |
14,100
+13,100
| +1,310% | +$519K |
|
|
TIGR
3692
CALL
UP Fintech Holding
TIGR
$858M
| $585K | ﹤0.01% |
170,100
-185,700
| -52% | -$736K |
|
3693
Teekay
TK
$981M
| $585K | ﹤0.01% |
80,403
+53,159
| +195% | +$416K |
|
3694
CALL
Fortune Brands Innovations
FBIN
$6.09B
| $584K | ﹤0.01% |
6,900
-6,000
| -47% | -$477K |
|
3695
CALL
Copa Holdings
CPA
$5.71B
| $583K | ﹤0.01% |
5,600
+200
| +4% | +$19.9K |
|
3696
CALL
Harmony Gold Mining
HMY
$9.7B
| $583K | ﹤0.01% |
71,400
+10,100
| +16% | +$64.5K |
|
3697
CALL
Denali Therapeutics
DNLI
$3.82B
| $582K | ﹤0.01% |
28,400
+27,900
| +5,580% | +$524K |
|
|
DX
3698
CALL
Dynex Capital
DX
$3.07B
| $582K | ﹤0.01% |
46,800
+46,500
| +15,500% | +$576K |
|
3699
Matrix Service
MTRX
$324M
| $582K | ﹤0.01% |
44,714
+31,018
| +226% | +$348K |
|
3700
CALL
Asure Software
ASUR
$237M
| $581K | ﹤0.01% |
74,800
-12,100
| -14% | -$109K |
|
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.